| /* |
| * Copyright (c) 2004-2006 Intel Corporation. All rights reserved. |
| * Copyright (c) 2004 Topspin Corporation. All rights reserved. |
| * Copyright (c) 2004, 2005 Voltaire Corporation. All rights reserved. |
| * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved. |
| * |
| * This software is available to you under a choice of one of two |
| * licenses. You may choose to be licensed under the terms of the GNU |
| * General Public License (GPL) Version 2, available from the file |
| * COPYING in the main directory of this source tree, or the |
| * OpenIB.org BSD license below: |
| * |
| * Redistribution and use in source and binary forms, with or |
| * without modification, are permitted provided that the following |
| * conditions are met: |
| * |
| * - Redistributions of source code must retain the above |
| * copyright notice, this list of conditions and the following |
| * disclaimer. |
| * |
| * - Redistributions in binary form must reproduce the above |
| * copyright notice, this list of conditions and the following |
| * disclaimer in the documentation and/or other materials |
| * provided with the distribution. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
| * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
| * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
| * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS |
| * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN |
| * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN |
| * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
| * SOFTWARE. |
| * |
| * $Id: cm.c 4311 2005-12-05 18:42:01Z sean.hefty $ |
| */ |
| |
| #include <linux/completion.h> |
| #include <linux/dma-mapping.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/workqueue.h> |
| |
| #include <rdma/ib_cache.h> |
| #include <rdma/ib_cm.h> |
| #include "cm_msgs.h" |
| |
| MODULE_AUTHOR("Sean Hefty"); |
| MODULE_DESCRIPTION("InfiniBand CM"); |
| MODULE_LICENSE("Dual BSD/GPL"); |
| |
| static void cm_add_one(struct ib_device *device); |
| static void cm_remove_one(struct ib_device *device); |
| |
| static struct ib_client cm_client = { |
| .name = "cm", |
| .add = cm_add_one, |
| .remove = cm_remove_one |
| }; |
| |
| static struct ib_cm { |
| spinlock_t lock; |
| struct list_head device_list; |
| rwlock_t device_lock; |
| struct rb_root listen_service_table; |
| u64 listen_service_id; |
| /* struct rb_root peer_service_table; todo: fix peer to peer */ |
| struct rb_root remote_qp_table; |
| struct rb_root remote_id_table; |
| struct rb_root remote_sidr_table; |
| struct idr local_id_table; |
| __be32 random_id_operand; |
| struct list_head timewait_list; |
| struct workqueue_struct *wq; |
| } cm; |
| |
| struct cm_port { |
| struct cm_device *cm_dev; |
| struct ib_mad_agent *mad_agent; |
| u8 port_num; |
| }; |
| |
| struct cm_device { |
| struct list_head list; |
| struct ib_device *device; |
| u8 ack_delay; |
| struct cm_port port[0]; |
| }; |
| |
| struct cm_av { |
| struct cm_port *port; |
| union ib_gid dgid; |
| struct ib_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 ib_sa_path_rec path[0]; |
| }; |
| |
| struct cm_timewait_info { |
| struct cm_work work; /* Must be first. */ |
| struct list_head list; |
| struct rb_node remote_qp_node; |
| struct rb_node remote_id_node; |
| __be64 remote_ca_guid; |
| __be32 remote_qpn; |
| u8 inserted_remote_qp; |
| u8 inserted_remote_id; |
| }; |
| |
| struct cm_id_private { |
| struct ib_cm_id id; |
| |
| struct rb_node service_node; |
| struct rb_node sidr_id_node; |
| spinlock_t lock; /* Do not acquire inside cm.lock */ |
| struct completion comp; |
| atomic_t refcount; |
| |
| 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; |
| struct ib_cm_compare_data *compare_data; |
| |
| void *private_data; |
| __be64 tid; |
| __be32 local_qpn; |
| __be32 remote_qpn; |
| enum ib_qp_type qp_type; |
| __be32 sq_psn; |
| __be32 rq_psn; |
| int timeout_ms; |
| enum ib_mtu path_mtu; |
| __be16 pkey; |
| u8 private_data_len; |
| u8 max_cm_retries; |
| u8 peer_to_peer; |
| u8 responder_resources; |
| u8 initiator_depth; |
| u8 retry_count; |
| u8 rnr_retry_count; |
| u8 service_timeout; |
| u8 target_ack_delay; |
| |
| struct list_head work_list; |
| atomic_t work_count; |
| }; |
| |
| static void cm_work_handler(struct work_struct *work); |
| |
| static inline void cm_deref_id(struct cm_id_private *cm_id_priv) |
| { |
| if (atomic_dec_and_test(&cm_id_priv->refcount)) |
| complete(&cm_id_priv->comp); |
| } |
| |
| static int cm_alloc_msg(struct cm_id_private *cm_id_priv, |
| struct ib_mad_send_buf **msg) |
| { |
| struct ib_mad_agent *mad_agent; |
| struct ib_mad_send_buf *m; |
| struct ib_ah *ah; |
| |
| mad_agent = cm_id_priv->av.port->mad_agent; |
| ah = ib_create_ah(mad_agent->qp->pd, &cm_id_priv->av.ah_attr); |
| if (IS_ERR(ah)) |
| return PTR_ERR(ah); |
| |
| 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); |
| if (IS_ERR(m)) { |
| ib_destroy_ah(ah); |
| return PTR_ERR(m); |
| } |
| |
| /* Timeout set by caller if response is expected. */ |
| m->ah = ah; |
| m->retries = cm_id_priv->max_cm_retries; |
| |
| atomic_inc(&cm_id_priv->refcount); |
| m->context[0] = cm_id_priv; |
| *msg = m; |
| 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; |
| 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); |
| |
| m = 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); |
| if (IS_ERR(m)) { |
| ib_destroy_ah(ah); |
| return PTR_ERR(m); |
| } |
| m->ah = ah; |
| *msg = m; |
| return 0; |
| } |
| |
| static void cm_free_msg(struct ib_mad_send_buf *msg) |
| { |
| ib_destroy_ah(msg->ah); |
| if (msg->context[0]) |
| cm_deref_id(msg->context[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_init_av_for_response(struct cm_port *port, struct ib_wc *wc, |
| struct ib_grh *grh, struct cm_av *av) |
| { |
| av->port = port; |
| av->pkey_index = wc->pkey_index; |
| ib_init_ah_from_wc(port->cm_dev->device, port->port_num, wc, |
| grh, &av->ah_attr); |
| } |
| |
| static int cm_init_av_by_path(struct ib_sa_path_rec *path, struct cm_av *av) |
| { |
| struct cm_device *cm_dev; |
| struct cm_port *port = NULL; |
| unsigned long flags; |
| int ret; |
| u8 p; |
| |
| read_lock_irqsave(&cm.device_lock, flags); |
| list_for_each_entry(cm_dev, &cm.device_list, list) { |
| if (!ib_find_cached_gid(cm_dev->device, &path->sgid, |
| &p, NULL)) { |
| port = &cm_dev->port[p-1]; |
| break; |
| } |
| } |
| read_unlock_irqrestore(&cm.device_lock, flags); |
| |
| if (!port) |
| return -EINVAL; |
| |
| ret = ib_find_cached_pkey(cm_dev->device, port->port_num, |
| be16_to_cpu(path->pkey), &av->pkey_index); |
| if (ret) |
| return ret; |
| |
| av->port = port; |
| ib_init_ah_from_path(cm_dev->device, port->port_num, path, |
| &av->ah_attr); |
| av->timeout = path->packet_life_time + 1; |
| return 0; |
| } |
| |
| static int cm_alloc_id(struct cm_id_private *cm_id_priv) |
| { |
| unsigned long flags; |
| int ret, id; |
| static int next_id; |
| |
| do { |
| spin_lock_irqsave(&cm.lock, flags); |
| ret = idr_get_new_above(&cm.local_id_table, cm_id_priv, |
| next_id, &id); |
| if (!ret) |
| next_id = ((unsigned) id + 1) & MAX_ID_MASK; |
| spin_unlock_irqrestore(&cm.lock, flags); |
| } while( (ret == -EAGAIN) && idr_pre_get(&cm.local_id_table, GFP_KERNEL) ); |
| |
| cm_id_priv->id.local_id = (__force __be32) (id ^ cm.random_id_operand); |
| return ret; |
| } |
| |
| static void cm_free_id(__be32 local_id) |
| { |
| spin_lock_irq(&cm.lock); |
| idr_remove(&cm.local_id_table, |
| (__force int) (local_id ^ cm.random_id_operand)); |
| spin_unlock_irq(&cm.lock); |
| } |
| |
| static struct cm_id_private * cm_get_id(__be32 local_id, __be32 remote_id) |
| { |
| struct cm_id_private *cm_id_priv; |
| |
| cm_id_priv = idr_find(&cm.local_id_table, |
| (__force int) (local_id ^ cm.random_id_operand)); |
| if (cm_id_priv) { |
| if (cm_id_priv->id.remote_id == remote_id) |
| atomic_inc(&cm_id_priv->refcount); |
| else |
| cm_id_priv = NULL; |
| } |
| |
| return cm_id_priv; |
| } |
| |
| static struct cm_id_private * cm_acquire_id(__be32 local_id, __be32 remote_id) |
| { |
| struct cm_id_private *cm_id_priv; |
| |
| spin_lock_irq(&cm.lock); |
| cm_id_priv = cm_get_id(local_id, remote_id); |
| spin_unlock_irq(&cm.lock); |
| |
| return cm_id_priv; |
| } |
| |
| static void cm_mask_copy(u8 *dst, u8 *src, u8 *mask) |
| { |
| int i; |
| |
| for (i = 0; i < IB_CM_COMPARE_SIZE / sizeof(unsigned long); i++) |
| ((unsigned long *) dst)[i] = ((unsigned long *) src)[i] & |
| ((unsigned long *) mask)[i]; |
| } |
| |
| static int cm_compare_data(struct ib_cm_compare_data *src_data, |
| struct ib_cm_compare_data *dst_data) |
| { |
| u8 src[IB_CM_COMPARE_SIZE]; |
| u8 dst[IB_CM_COMPARE_SIZE]; |
| |
| if (!src_data || !dst_data) |
| return 0; |
| |
| cm_mask_copy(src, src_data->data, dst_data->mask); |
| cm_mask_copy(dst, dst_data->data, src_data->mask); |
| return memcmp(src, dst, IB_CM_COMPARE_SIZE); |
| } |
| |
| static int cm_compare_private_data(u8 *private_data, |
| struct ib_cm_compare_data *dst_data) |
| { |
| u8 src[IB_CM_COMPARE_SIZE]; |
| |
| if (!dst_data) |
| return 0; |
| |
| cm_mask_copy(src, private_data, dst_data->mask); |
| return memcmp(src, dst_data->data, IB_CM_COMPARE_SIZE); |
| } |
| |
| static struct cm_id_private * cm_insert_listen(struct cm_id_private *cm_id_priv) |
| { |
| struct rb_node **link = &cm.listen_service_table.rb_node; |
| struct rb_node *parent = NULL; |
| struct cm_id_private *cur_cm_id_priv; |
| __be64 service_id = cm_id_priv->id.service_id; |
| __be64 service_mask = cm_id_priv->id.service_mask; |
| int data_cmp; |
| |
| while (*link) { |
| parent = *link; |
| cur_cm_id_priv = rb_entry(parent, struct cm_id_private, |
| service_node); |
| data_cmp = cm_compare_data(cm_id_priv->compare_data, |
| cur_cm_id_priv->compare_data); |
| 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) && |
| !data_cmp) |
| 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 (service_id < cur_cm_id_priv->id.service_id) |
| link = &(*link)->rb_left; |
| else if (service_id > cur_cm_id_priv->id.service_id) |
| link = &(*link)->rb_right; |
| else if (data_cmp < 0) |
| link = &(*link)->rb_left; |
| else |
| link = &(*link)->rb_right; |
| } |
| rb_link_node(&cm_id_priv->service_node, parent, link); |
| rb_insert_color(&cm_id_priv->service_node, &cm.listen_service_table); |
| return NULL; |
| } |
| |
| static struct cm_id_private * cm_find_listen(struct ib_device *device, |
| __be64 service_id, |
| u8 *private_data) |
| { |
| struct rb_node *node = cm.listen_service_table.rb_node; |
| struct cm_id_private *cm_id_priv; |
| int data_cmp; |
| |
| while (node) { |
| cm_id_priv = rb_entry(node, struct cm_id_private, service_node); |
| data_cmp = cm_compare_private_data(private_data, |
| cm_id_priv->compare_data); |
| if ((cm_id_priv->id.service_mask & service_id) == |
| cm_id_priv->id.service_id && |
| (cm_id_priv->id.device == device) && !data_cmp) |
| 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 (service_id < cm_id_priv->id.service_id) |
| node = node->rb_left; |
| else if (service_id > cm_id_priv->id.service_id) |
| node = node->rb_right; |
| else if (data_cmp < 0) |
| node = node->rb_left; |
| 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 (remote_id < cur_timewait_info->work.remote_id) |
| link = &(*link)->rb_left; |
| else if (remote_id > cur_timewait_info->work.remote_id) |
| link = &(*link)->rb_right; |
| else if (remote_ca_guid < cur_timewait_info->remote_ca_guid) |
| link = &(*link)->rb_left; |
| else if (remote_ca_guid > cur_timewait_info->remote_ca_guid) |
| link = &(*link)->rb_right; |
| else |
| return cur_timewait_info; |
| } |
| timewait_info->inserted_remote_id = 1; |
| rb_link_node(&timewait_info->remote_id_node, parent, link); |
| rb_insert_color(&timewait_info->remote_id_node, &cm.remote_id_table); |
| return NULL; |
| } |
| |
| static struct cm_timewait_info * cm_find_remote_id(__be64 remote_ca_guid, |
| __be32 remote_id) |
| { |
| struct rb_node *node = cm.remote_id_table.rb_node; |
| struct cm_timewait_info *timewait_info; |
| |
| while (node) { |
| timewait_info = rb_entry(node, struct cm_timewait_info, |
| remote_id_node); |
| if (remote_id < timewait_info->work.remote_id) |
| node = node->rb_left; |
| else if (remote_id > timewait_info->work.remote_id) |
| node = node->rb_right; |
| else if (remote_ca_guid < timewait_info->remote_ca_guid) |
| node = node->rb_left; |
| else if (remote_ca_guid > timewait_info->remote_ca_guid) |
| node = node->rb_right; |
| else |
| return timewait_info; |
| } |
| return NULL; |
| } |
| |
| static struct cm_timewait_info * cm_insert_remote_qpn(struct cm_timewait_info |
| *timewait_info) |
| { |
| struct rb_node **link = &cm.remote_qp_table.rb_node; |
| struct rb_node *parent = NULL; |
| struct cm_timewait_info *cur_timewait_info; |
| __be64 remote_ca_guid = timewait_info->remote_ca_guid; |
| __be32 remote_qpn = timewait_info->remote_qpn; |
| |
| while (*link) { |
| parent = *link; |
| cur_timewait_info = rb_entry(parent, struct cm_timewait_info, |
| remote_qp_node); |
| if (remote_qpn < cur_timewait_info->remote_qpn) |
| link = &(*link)->rb_left; |
| else if (remote_qpn > cur_timewait_info->remote_qpn) |
| link = &(*link)->rb_right; |
| else if (remote_ca_guid < cur_timewait_info->remote_ca_guid) |
| link = &(*link)->rb_left; |
| else if (remote_ca_guid > cur_timewait_info->remote_ca_guid) |
| link = &(*link)->rb_right; |
| else |
| return cur_timewait_info; |
| } |
| timewait_info->inserted_remote_qp = 1; |
| rb_link_node(&timewait_info->remote_qp_node, parent, link); |
| rb_insert_color(&timewait_info->remote_qp_node, &cm.remote_qp_table); |
| return NULL; |
| } |
| |
| static struct cm_id_private * cm_insert_remote_sidr(struct cm_id_private |
| *cm_id_priv) |
| { |
| struct rb_node **link = &cm.remote_sidr_table.rb_node; |
| struct rb_node *parent = NULL; |
| struct cm_id_private *cur_cm_id_priv; |
| union ib_gid *port_gid = &cm_id_priv->av.dgid; |
| __be32 remote_id = cm_id_priv->id.remote_id; |
| |
| while (*link) { |
| parent = *link; |
| cur_cm_id_priv = rb_entry(parent, struct cm_id_private, |
| sidr_id_node); |
| if (remote_id < cur_cm_id_priv->id.remote_id) |
| link = &(*link)->rb_left; |
| else if (remote_id > cur_cm_id_priv->id.remote_id) |
| link = &(*link)->rb_right; |
| else { |
| int cmp; |
| cmp = memcmp(port_gid, &cur_cm_id_priv->av.dgid, |
| sizeof *port_gid); |
| if (cmp < 0) |
| link = &(*link)->rb_left; |
| else if (cmp > 0) |
| link = &(*link)->rb_right; |
| else |
| return cur_cm_id_priv; |
| } |
| } |
| rb_link_node(&cm_id_priv->sidr_id_node, parent, link); |
| rb_insert_color(&cm_id_priv->sidr_id_node, &cm.remote_sidr_table); |
| return NULL; |
| } |
| |
| static void cm_reject_sidr_req(struct cm_id_private *cm_id_priv, |
| enum ib_cm_sidr_status status) |
| { |
| struct ib_cm_sidr_rep_param param; |
| |
| memset(¶m, 0, sizeof param); |
| param.status = status; |
| ib_send_cm_sidr_rep(&cm_id_priv->id, ¶m); |
| } |
| |
| struct ib_cm_id *ib_create_cm_id(struct ib_device *device, |
| ib_cm_handler cm_handler, |
| void *context) |
| { |
| struct cm_id_private *cm_id_priv; |
| int ret; |
| |
| cm_id_priv = kzalloc(sizeof *cm_id_priv, GFP_KERNEL); |
| if (!cm_id_priv) |
| return ERR_PTR(-ENOMEM); |
| |
| cm_id_priv->id.state = IB_CM_IDLE; |
| cm_id_priv->id.device = device; |
| cm_id_priv->id.cm_handler = cm_handler; |
| cm_id_priv->id.context = context; |
| cm_id_priv->id.remote_cm_qpn = 1; |
| ret = cm_alloc_id(cm_id_priv); |
| if (ret) |
| goto error; |
| |
| spin_lock_init(&cm_id_priv->lock); |
| init_completion(&cm_id_priv->comp); |
| INIT_LIST_HEAD(&cm_id_priv->work_list); |
| atomic_set(&cm_id_priv->work_count, -1); |
| atomic_set(&cm_id_priv->refcount, 1); |
| return &cm_id_priv->id; |
| |
| error: |
| kfree(cm_id_priv); |
| return ERR_PTR(-ENOMEM); |
| } |
| EXPORT_SYMBOL(ib_create_cm_id); |
| |
| static struct cm_work * cm_dequeue_work(struct cm_id_private *cm_id_priv) |
| { |
| struct cm_work *work; |
| |
| if (list_empty(&cm_id_priv->work_list)) |
| return NULL; |
| |
| work = list_entry(cm_id_priv->work_list.next, struct cm_work, list); |
| list_del(&work->list); |
| return work; |
| } |
| |
| static void cm_free_work(struct cm_work *work) |
| { |
| if (work->mad_recv_wc) |
| ib_free_recv_mad(work->mad_recv_wc); |
| kfree(work); |
| } |
| |
| static inline int cm_convert_to_ms(int iba_time) |
| { |
| /* approximate conversion to ms from 4.096us x 2^iba_time */ |
| return 1 << max(iba_time - 8, 0); |
| } |
| |
| /* |
| * calculate: 4.096x2^ack_timeout = 4.096x2^ack_delay + 2x4.096x2^life_time |
| * Because of how ack_timeout is stored, adding one doubles the timeout. |
| * To avoid large timeouts, select the max(ack_delay, life_time + 1), and |
| * increment it (round up) only if the other is within 50%. |
| */ |
| static u8 cm_ack_timeout(u8 ca_ack_delay, u8 packet_life_time) |
| { |
| int ack_timeout = packet_life_time + 1; |
| |
| if (ack_timeout >= ca_ack_delay) |
| ack_timeout += (ca_ack_delay >= (ack_timeout - 1)); |
| else |
| ack_timeout = ca_ack_delay + |
| (ack_timeout >= (ca_ack_delay - 1)); |
| |
| return min(31, ack_timeout); |
| } |
| |
| static void cm_cleanup_timewait(struct cm_timewait_info *timewait_info) |
| { |
| if (timewait_info->inserted_remote_id) { |
| rb_erase(&timewait_info->remote_id_node, &cm.remote_id_table); |
| timewait_info->inserted_remote_id = 0; |
| } |
| |
| if (timewait_info->inserted_remote_qp) { |
| rb_erase(&timewait_info->remote_qp_node, &cm.remote_qp_table); |
| timewait_info->inserted_remote_qp = 0; |
| } |
| } |
| |
| static struct cm_timewait_info * cm_create_timewait_info(__be32 local_id) |
| { |
| struct cm_timewait_info *timewait_info; |
| |
| timewait_info = kzalloc(sizeof *timewait_info, GFP_KERNEL); |
| if (!timewait_info) |
| return ERR_PTR(-ENOMEM); |
| |
| timewait_info->work.local_id = local_id; |
| INIT_DELAYED_WORK(&timewait_info->work.work, cm_work_handler); |
| timewait_info->work.cm_event.event = IB_CM_TIMEWAIT_EXIT; |
| return timewait_info; |
| } |
| |
| static void cm_enter_timewait(struct cm_id_private *cm_id_priv) |
| { |
| int wait_time; |
| unsigned long flags; |
| |
| spin_lock_irqsave(&cm.lock, flags); |
| cm_cleanup_timewait(cm_id_priv->timewait_info); |
| list_add_tail(&cm_id_priv->timewait_info->list, &cm.timewait_list); |
| spin_unlock_irqrestore(&cm.lock, flags); |
| |
| /* |
| * The cm_id could be destroyed by the user before we exit timewait. |
| * To protect against this, we search for the cm_id after exiting |
| * timewait before notifying the user that we've exited timewait. |
| */ |
| cm_id_priv->id.state = IB_CM_TIMEWAIT; |
| wait_time = cm_convert_to_ms(cm_id_priv->av.timeout); |
| queue_delayed_work(cm.wq, &cm_id_priv->timewait_info->work.work, |
| msecs_to_jiffies(wait_time)); |
| cm_id_priv->timewait_info = NULL; |
| } |
| |
| static void cm_reset_to_idle(struct cm_id_private *cm_id_priv) |
| { |
| unsigned long flags; |
| |
| cm_id_priv->id.state = IB_CM_IDLE; |
| if (cm_id_priv->timewait_info) { |
| spin_lock_irqsave(&cm.lock, flags); |
| cm_cleanup_timewait(cm_id_priv->timewait_info); |
| spin_unlock_irqrestore(&cm.lock, flags); |
| kfree(cm_id_priv->timewait_info); |
| cm_id_priv->timewait_info = NULL; |
| } |
| } |
| |
| static void cm_destroy_id(struct ib_cm_id *cm_id, int err) |
| { |
| struct cm_id_private *cm_id_priv; |
| struct cm_work *work; |
| |
| cm_id_priv = container_of(cm_id, struct cm_id_private, id); |
| retest: |
| spin_lock_irq(&cm_id_priv->lock); |
| switch (cm_id->state) { |
| case IB_CM_LISTEN: |
| cm_id->state = IB_CM_IDLE; |
| spin_unlock_irq(&cm_id_priv->lock); |
| spin_lock_irq(&cm.lock); |
| rb_erase(&cm_id_priv->service_node, &cm.listen_service_table); |
| spin_unlock_irq(&cm.lock); |
| break; |
| case IB_CM_SIDR_REQ_SENT: |
| cm_id->state = IB_CM_IDLE; |
| ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
| spin_unlock_irq(&cm_id_priv->lock); |
| break; |
| case IB_CM_SIDR_REQ_RCVD: |
| spin_unlock_irq(&cm_id_priv->lock); |
| cm_reject_sidr_req(cm_id_priv, IB_SIDR_REJECT); |
| break; |
| case IB_CM_REQ_SENT: |
| ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
| spin_unlock_irq(&cm_id_priv->lock); |
| ib_send_cm_rej(cm_id, IB_CM_REJ_TIMEOUT, |
| &cm_id_priv->id.device->node_guid, |
| sizeof cm_id_priv->id.device->node_guid, |
| NULL, 0); |
| break; |
| case IB_CM_REQ_RCVD: |
| if (err == -ENOMEM) { |
| /* Do not reject to allow future retries. */ |
| cm_reset_to_idle(cm_id_priv); |
| spin_unlock_irq(&cm_id_priv->lock); |
| } else { |
| spin_unlock_irq(&cm_id_priv->lock); |
| ib_send_cm_rej(cm_id, IB_CM_REJ_CONSUMER_DEFINED, |
| NULL, 0, NULL, 0); |
| } |
| break; |
| case IB_CM_MRA_REQ_RCVD: |
| case IB_CM_REP_SENT: |
| case IB_CM_MRA_REP_RCVD: |
| ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
| /* Fall through */ |
| case IB_CM_MRA_REQ_SENT: |
| case IB_CM_REP_RCVD: |
| case IB_CM_MRA_REP_SENT: |
| spin_unlock_irq(&cm_id_priv->lock); |
| ib_send_cm_rej(cm_id, IB_CM_REJ_CONSUMER_DEFINED, |
| NULL, 0, NULL, 0); |
| break; |
| case IB_CM_ESTABLISHED: |
| spin_unlock_irq(&cm_id_priv->lock); |
| ib_send_cm_dreq(cm_id, NULL, 0); |
| goto retest; |
| case IB_CM_DREQ_SENT: |
| ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
| cm_enter_timewait(cm_id_priv); |
| spin_unlock_irq(&cm_id_priv->lock); |
| break; |
| case IB_CM_DREQ_RCVD: |
| spin_unlock_irq(&cm_id_priv->lock); |
| ib_send_cm_drep(cm_id, NULL, 0); |
| break; |
| default: |
| spin_unlock_irq(&cm_id_priv->lock); |
| break; |
| } |
| |
| cm_free_id(cm_id->local_id); |
| cm_deref_id(cm_id_priv); |
| wait_for_completion(&cm_id_priv->comp); |
| while ((work = cm_dequeue_work(cm_id_priv)) != NULL) |
| cm_free_work(work); |
| kfree(cm_id_priv->compare_data); |
| kfree(cm_id_priv->private_data); |
| kfree(cm_id_priv); |
| } |
| |
| void ib_destroy_cm_id(struct ib_cm_id *cm_id) |
| { |
| cm_destroy_id(cm_id, 0); |
| } |
| EXPORT_SYMBOL(ib_destroy_cm_id); |
| |
| int ib_cm_listen(struct ib_cm_id *cm_id, __be64 service_id, __be64 service_mask, |
| struct ib_cm_compare_data *compare_data) |
| { |
| struct cm_id_private *cm_id_priv, *cur_cm_id_priv; |
| unsigned long flags; |
| int ret = 0; |
| |
| service_mask = service_mask ? service_mask : |
| __constant_cpu_to_be64(~0ULL); |
| service_id &= service_mask; |
| if ((service_id & IB_SERVICE_ID_AGN_MASK) == IB_CM_ASSIGN_SERVICE_ID && |
| (service_id != IB_CM_ASSIGN_SERVICE_ID)) |
| return -EINVAL; |
| |
| cm_id_priv = container_of(cm_id, struct cm_id_private, id); |
| if (cm_id->state != IB_CM_IDLE) |
| return -EINVAL; |
| |
| if (compare_data) { |
| cm_id_priv->compare_data = kzalloc(sizeof *compare_data, |
| GFP_KERNEL); |
| if (!cm_id_priv->compare_data) |
| return -ENOMEM; |
| cm_mask_copy(cm_id_priv->compare_data->data, |
| compare_data->data, compare_data->mask); |
| memcpy(cm_id_priv->compare_data->mask, compare_data->mask, |
| IB_CM_COMPARE_SIZE); |
| } |
| |
| cm_id->state = IB_CM_LISTEN; |
| |
| spin_lock_irqsave(&cm.lock, flags); |
| if (service_id == IB_CM_ASSIGN_SERVICE_ID) { |
| cm_id->service_id = cpu_to_be64(cm.listen_service_id++); |
| cm_id->service_mask = __constant_cpu_to_be64(~0ULL); |
| } else { |
| cm_id->service_id = service_id; |
| cm_id->service_mask = service_mask; |
| } |
| cur_cm_id_priv = cm_insert_listen(cm_id_priv); |
| spin_unlock_irqrestore(&cm.lock, flags); |
| |
| if (cur_cm_id_priv) { |
| cm_id->state = IB_CM_IDLE; |
| kfree(cm_id_priv->compare_data); |
| cm_id_priv->compare_data = NULL; |
| ret = -EBUSY; |
| } |
| return ret; |
| } |
| EXPORT_SYMBOL(ib_cm_listen); |
| |
| static __be64 cm_form_tid(struct cm_id_private *cm_id_priv, |
| enum cm_msg_sequence msg_seq) |
| { |
| u64 hi_tid, low_tid; |
| |
| hi_tid = ((u64) cm_id_priv->av.port->mad_agent->hi_tid) << 32; |
| low_tid = (u64) ((__force u32)cm_id_priv->id.local_id | |
| (msg_seq << 30)); |
| return cpu_to_be64(hi_tid | low_tid); |
| } |
| |
| static void cm_format_mad_hdr(struct ib_mad_hdr *hdr, |
| __be16 attr_id, __be64 tid) |
| { |
| hdr->base_version = IB_MGMT_BASE_VERSION; |
| hdr->mgmt_class = IB_MGMT_CLASS_CM; |
| hdr->class_version = IB_CM_CLASS_VERSION; |
| hdr->method = IB_MGMT_METHOD_SEND; |
| hdr->attr_id = attr_id; |
| hdr->tid = tid; |
| } |
| |
| static void cm_format_req(struct cm_req_msg *req_msg, |
| struct cm_id_private *cm_id_priv, |
| struct ib_cm_req_param *param) |
| { |
| cm_format_mad_hdr(&req_msg->hdr, CM_REQ_ATTR_ID, |
| cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_REQ)); |
| |
| req_msg->local_comm_id = cm_id_priv->id.local_id; |
| req_msg->service_id = param->service_id; |
| req_msg->local_ca_guid = cm_id_priv->id.device->node_guid; |
| cm_req_set_local_qpn(req_msg, cpu_to_be32(param->qp_num)); |
| cm_req_set_resp_res(req_msg, param->responder_resources); |
| cm_req_set_init_depth(req_msg, param->initiator_depth); |
| cm_req_set_remote_resp_timeout(req_msg, |
| param->remote_cm_response_timeout); |
| cm_req_set_qp_type(req_msg, param->qp_type); |
| cm_req_set_flow_ctrl(req_msg, param->flow_control); |
| cm_req_set_starting_psn(req_msg, cpu_to_be32(param->starting_psn)); |
| cm_req_set_local_resp_timeout(req_msg, |
| param->local_cm_response_timeout); |
| cm_req_set_retry_count(req_msg, param->retry_count); |
| req_msg->pkey = param->primary_path->pkey; |
| cm_req_set_path_mtu(req_msg, param->primary_path->mtu); |
| cm_req_set_rnr_retry_count(req_msg, param->rnr_retry_count); |
| cm_req_set_max_cm_retries(req_msg, param->max_cm_retries); |
| cm_req_set_srq(req_msg, param->srq); |
| |
| req_msg->primary_local_lid = param->primary_path->slid; |
| req_msg->primary_remote_lid = param->primary_path->dlid; |
| req_msg->primary_local_gid = param->primary_path->sgid; |
| req_msg->primary_remote_gid = param->primary_path->dgid; |
| cm_req_set_primary_flow_label(req_msg, param->primary_path->flow_label); |
| cm_req_set_primary_packet_rate(req_msg, param->primary_path->rate); |
| req_msg->primary_traffic_class = param->primary_path->traffic_class; |
| req_msg->primary_hop_limit = param->primary_path->hop_limit; |
| cm_req_set_primary_sl(req_msg, param->primary_path->sl); |
| cm_req_set_primary_subnet_local(req_msg, 1); /* local only... */ |
| cm_req_set_primary_local_ack_timeout(req_msg, |
| cm_ack_timeout(cm_id_priv->av.port->cm_dev->ack_delay, |
| param->primary_path->packet_life_time)); |
| |
| if (param->alternate_path) { |
| req_msg->alt_local_lid = param->alternate_path->slid; |
| req_msg->alt_remote_lid = param->alternate_path->dlid; |
| req_msg->alt_local_gid = param->alternate_path->sgid; |
| req_msg->alt_remote_gid = param->alternate_path->dgid; |
| cm_req_set_alt_flow_label(req_msg, |
| param->alternate_path->flow_label); |
| cm_req_set_alt_packet_rate(req_msg, param->alternate_path->rate); |
| req_msg->alt_traffic_class = param->alternate_path->traffic_class; |
| req_msg->alt_hop_limit = param->alternate_path->hop_limit; |
| cm_req_set_alt_sl(req_msg, param->alternate_path->sl); |
| cm_req_set_alt_subnet_local(req_msg, 1); /* local only... */ |
| cm_req_set_alt_local_ack_timeout(req_msg, |
| cm_ack_timeout(cm_id_priv->av.port->cm_dev->ack_delay, |
| param->alternate_path->packet_life_time)); |
| } |
| |
| if (param->private_data && param->private_data_len) |
| memcpy(req_msg->private_data, param->private_data, |
| param->private_data_len); |
| } |
| |
| static int cm_validate_req_param(struct ib_cm_req_param *param) |
| { |
| /* peer-to-peer not supported */ |
| if (param->peer_to_peer) |
| return -EINVAL; |
| |
| if (!param->primary_path) |
| return -EINVAL; |
| |
| if (param->qp_type != IB_QPT_RC && param->qp_type != IB_QPT_UC) |
| return -EINVAL; |
| |
| if (param->private_data && |
| param->private_data_len > IB_CM_REQ_PRIVATE_DATA_SIZE) |
| return -EINVAL; |
| |
| if (param->alternate_path && |
| (param->alternate_path->pkey != param->primary_path->pkey || |
| param->alternate_path->mtu != param->primary_path->mtu)) |
| return -EINVAL; |
| |
| return 0; |
| } |
| |
| int ib_send_cm_req(struct ib_cm_id *cm_id, |
| struct ib_cm_req_param *param) |
| { |
| struct cm_id_private *cm_id_priv; |
| struct cm_req_msg *req_msg; |
| unsigned long flags; |
| int ret; |
| |
| ret = cm_validate_req_param(param); |
| if (ret) |
| return ret; |
| |
| /* Verify that we're not in timewait. */ |
| cm_id_priv = container_of(cm_id, struct cm_id_private, id); |
| spin_lock_irqsave(&cm_id_priv->lock, flags); |
| if (cm_id->state != IB_CM_IDLE) { |
| spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| ret = -EINVAL; |
| goto out; |
| } |
| spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| |
| cm_id_priv->timewait_info = cm_create_timewait_info(cm_id_priv-> |
| id.local_id); |
| if (IS_ERR(cm_id_priv->timewait_info)) { |
| ret = PTR_ERR(cm_id_priv->timewait_info); |
| goto out; |
| } |
| |
| ret = cm_init_av_by_path(param->primary_path, &cm_id_priv->av); |
| if (ret) |
| goto error1; |
| if (param->alternate_path) { |
| ret = cm_init_av_by_path(param->alternate_path, |
| &cm_id_priv->alt_av); |
| if (ret) |
| goto error1; |
| } |
| cm_id->service_id = param->service_id; |
| cm_id->service_mask = __constant_cpu_to_be64(~0ULL); |
| cm_id_priv->timeout_ms = cm_convert_to_ms( |
| param->primary_path->packet_life_time) * 2 + |
| cm_convert_to_ms( |
| param->remote_cm_response_timeout); |
| cm_id_priv->max_cm_retries = param->max_cm_retries; |
| cm_id_priv->initiator_depth = param->initiator_depth; |
| cm_id_priv->responder_resources = param->responder_resources; |
| cm_id_priv->retry_count = param->retry_count; |
| cm_id_priv->path_mtu = param->primary_path->mtu; |
| cm_id_priv->pkey = param->primary_path->pkey; |
| cm_id_priv->qp_type = param->qp_type; |
| |
| ret = cm_alloc_msg(cm_id_priv, &cm_id_priv->msg); |
| if (ret) |
| goto error1; |
| |
| req_msg = (struct cm_req_msg *) cm_id_priv->msg->mad; |
| cm_format_req(req_msg, cm_id_priv, param); |
| cm_id_priv->tid = req_msg->hdr.tid; |
| cm_id_priv->msg->timeout_ms = cm_id_priv->timeout_ms; |
| cm_id_priv->msg->context[1] = (void *) (unsigned long) IB_CM_REQ_SENT; |
| |
| cm_id_priv->local_qpn = cm_req_get_local_qpn(req_msg); |
| cm_id_priv->rq_psn = cm_req_get_starting_psn(req_msg); |
| |
| spin_lock_irqsave(&cm_id_priv->lock, flags); |
| ret = ib_post_send_mad(cm_id_priv->msg, NULL); |
| if (ret) { |
| spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| goto error2; |
| } |
| BUG_ON(cm_id->state != IB_CM_IDLE); |
| cm_id->state = IB_CM_REQ_SENT; |
| spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| return 0; |
| |
| error2: cm_free_msg(cm_id_priv->msg); |
| error1: kfree(cm_id_priv->timewait_info); |
| out: return ret; |
| } |
| EXPORT_SYMBOL(ib_send_cm_req); |
| |
| static int cm_issue_rej(struct cm_port *port, |
| struct ib_mad_recv_wc *mad_recv_wc, |
| enum ib_cm_rej_reason reason, |
| enum cm_msg_response msg_rejected, |
| void *ari, u8 ari_length) |
| { |
| struct ib_mad_send_buf *msg = NULL; |
| struct cm_rej_msg *rej_msg, *rcv_msg; |
| int ret; |
| |
| ret = cm_alloc_response_msg(port, mad_recv_wc, &msg); |
| if (ret) |
| return ret; |
| |
| /* We just need common CM header information. Cast to any message. */ |
| rcv_msg = (struct cm_rej_msg *) mad_recv_wc->recv_buf.mad; |
| rej_msg = (struct cm_rej_msg *) msg->mad; |
| |
| cm_format_mad_hdr(&rej_msg->hdr, CM_REJ_ATTR_ID, rcv_msg->hdr.tid); |
| rej_msg->remote_comm_id = rcv_msg->local_comm_id; |
| rej_msg->local_comm_id = rcv_msg->remote_comm_id; |
| cm_rej_set_msg_rejected(rej_msg, msg_rejected); |
| rej_msg->reason = cpu_to_be16(reason); |
| |
| if (ari && ari_length) { |
| cm_rej_set_reject_info_len(rej_msg, ari_length); |
| memcpy(rej_msg->ari, ari, ari_length); |
| } |
| |
| ret = ib_post_send_mad(msg, NULL); |
| if (ret) |
| cm_free_msg(msg); |
| |
| return ret; |
| } |
| |
| static inline int cm_is_active_peer(__be64 local_ca_guid, __be64 remote_ca_guid, |
| __be32 local_qpn, __be32 remote_qpn) |
| { |
| return (be64_to_cpu(local_ca_guid) > be64_to_cpu(remote_ca_guid) || |
| ((local_ca_guid == remote_ca_guid) && |
| (be32_to_cpu(local_qpn) > be32_to_cpu(remote_qpn)))); |
| } |
| |
| static void cm_format_paths_from_req(struct cm_req_msg *req_msg, |
| struct ib_sa_path_rec *primary_path, |
| struct ib_sa_path_rec *alt_path) |
| { |
| memset(primary_path, 0, sizeof *primary_path); |
| primary_path->dgid = req_msg->primary_local_gid; |
| primary_path->sgid = req_msg->primary_remote_gid; |
| primary_path->dlid = req_msg->primary_local_lid; |
| primary_path->slid = req_msg->primary_remote_lid; |
| primary_path->flow_label = cm_req_get_primary_flow_label(req_msg); |
| primary_path->hop_limit = req_msg->primary_hop_limit; |
| primary_path->traffic_class = req_msg->primary_traffic_class; |
| primary_path->reversible = 1; |
| primary_path->pkey = req_msg->pkey; |
| primary_path->sl = cm_req_get_primary_sl(req_msg); |
| primary_path->mtu_selector = IB_SA_EQ; |
| primary_path->mtu = cm_req_get_path_mtu(req_msg); |
| primary_path->rate_selector = IB_SA_EQ; |
| primary_path->rate = cm_req_get_primary_packet_rate(req_msg); |
| primary_path->packet_life_time_selector = IB_SA_EQ; |
| primary_path->packet_life_time = |
| cm_req_get_primary_local_ack_timeout(req_msg); |
| primary_path->packet_life_time -= (primary_path->packet_life_time > 0); |
| |
| if (req_msg->alt_local_lid) { |
| memset(alt_path, 0, sizeof *alt_path); |
| alt_path->dgid = req_msg->alt_local_gid; |
| alt_path->sgid = req_msg->alt_remote_gid; |
| alt_path->dlid = req_msg->alt_local_lid; |
| alt_path->slid = req_msg->alt_remote_lid; |
| alt_path->flow_label = cm_req_get_alt_flow_label(req_msg); |
| alt_path->hop_limit = req_msg->alt_hop_limit; |
| alt_path->traffic_class = req_msg->alt_traffic_class; |
| alt_path->reversible = 1; |
| alt_path->pkey = req_msg->pkey; |
| alt_path->sl = cm_req_get_alt_sl(req_msg); |
| alt_path->mtu_selector = IB_SA_EQ; |
| alt_path->mtu = cm_req_get_path_mtu(req_msg); |
| alt_path->rate_selector = IB_SA_EQ; |
| alt_path->rate = cm_req_get_alt_packet_rate(req_msg); |
| alt_path->packet_life_time_selector = IB_SA_EQ; |
| alt_path->packet_life_time = |
| cm_req_get_alt_local_ack_timeout(req_msg); |
| alt_path->packet_life_time -= (alt_path->packet_life_time > 0); |
| } |
| } |
| |
| 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->port = cm_id_priv->av.port->port_num; |
| param->primary_path = &work->path[0]; |
| if (req_msg->alt_local_lid) |
| param->alternate_path = &work->path[1]; |
| else |
| param->alternate_path = NULL; |
| param->remote_ca_guid = req_msg->local_ca_guid; |
| param->remote_qkey = be32_to_cpu(req_msg->local_qkey); |
| param->remote_qpn = be32_to_cpu(cm_req_get_local_qpn(req_msg)); |
| param->qp_type = cm_req_get_qp_type(req_msg); |
| param->starting_psn = be32_to_cpu(cm_req_get_starting_psn(req_msg)); |
| param->responder_resources = cm_req_get_init_depth(req_msg); |
| param->initiator_depth = cm_req_get_resp_res(req_msg); |
| param->local_cm_response_timeout = |
| cm_req_get_remote_resp_timeout(req_msg); |
| param->flow_control = cm_req_get_flow_ctrl(req_msg); |
| param->remote_cm_response_timeout = |
| cm_req_get_local_resp_timeout(req_msg); |
| param->retry_count = cm_req_get_retry_count(req_msg); |
| param->rnr_retry_count = cm_req_get_rnr_retry_count(req_msg); |
| param->srq = cm_req_get_srq(req_msg); |
| work->cm_event.private_data = &req_msg->private_data; |
| } |
| |
| static void cm_process_work(struct cm_id_private *cm_id_priv, |
| struct cm_work *work) |
| { |
| int ret; |
| |
| /* We will typically only have the current event to report. */ |
| ret = cm_id_priv->id.cm_handler(&cm_id_priv->id, &work->cm_event); |
| cm_free_work(work); |
| |
| while (!ret && !atomic_add_negative(-1, &cm_id_priv->work_count)) { |
| spin_lock_irq(&cm_id_priv->lock); |
| work = cm_dequeue_work(cm_id_priv); |
| spin_unlock_irq(&cm_id_priv->lock); |
| BUG_ON(!work); |
| ret = cm_id_priv->id.cm_handler(&cm_id_priv->id, |
| &work->cm_event); |
| cm_free_work(work); |
| } |
| cm_deref_id(cm_id_priv); |
| if (ret) |
| cm_destroy_id(&cm_id_priv->id, ret); |
| } |
| |
| static void cm_format_mra(struct cm_mra_msg *mra_msg, |
| struct cm_id_private *cm_id_priv, |
| enum cm_msg_response msg_mraed, u8 service_timeout, |
| const void *private_data, u8 private_data_len) |
| { |
| cm_format_mad_hdr(&mra_msg->hdr, CM_MRA_ATTR_ID, cm_id_priv->tid); |
| cm_mra_set_msg_mraed(mra_msg, msg_mraed); |
| mra_msg->local_comm_id = cm_id_priv->id.local_id; |
| mra_msg->remote_comm_id = cm_id_priv->id.remote_id; |
| cm_mra_set_service_timeout(mra_msg, service_timeout); |
| |
| if (private_data && private_data_len) |
| memcpy(mra_msg->private_data, private_data, private_data_len); |
| } |
| |
| static void cm_format_rej(struct cm_rej_msg *rej_msg, |
| struct cm_id_private *cm_id_priv, |
| enum ib_cm_rej_reason reason, |
| void *ari, |
| u8 ari_length, |
| const void *private_data, |
| u8 private_data_len) |
| { |
| cm_format_mad_hdr(&rej_msg->hdr, CM_REJ_ATTR_ID, cm_id_priv->tid); |
| rej_msg->remote_comm_id = cm_id_priv->id.remote_id; |
| |
| switch(cm_id_priv->id.state) { |
| case IB_CM_REQ_RCVD: |
| rej_msg->local_comm_id = 0; |
| cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_REQ); |
| break; |
| case IB_CM_MRA_REQ_SENT: |
| rej_msg->local_comm_id = cm_id_priv->id.local_id; |
| cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_REQ); |
| break; |
| case IB_CM_REP_RCVD: |
| case IB_CM_MRA_REP_SENT: |
| rej_msg->local_comm_id = cm_id_priv->id.local_id; |
| cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_REP); |
| break; |
| default: |
| rej_msg->local_comm_id = cm_id_priv->id.local_id; |
| cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_OTHER); |
| break; |
| } |
| |
| rej_msg->reason = cpu_to_be16(reason); |
| if (ari && ari_length) { |
| cm_rej_set_reject_info_len(rej_msg, ari_length); |
| memcpy(rej_msg->ari, ari, ari_length); |
| } |
| |
| if (private_data && private_data_len) |
| memcpy(rej_msg->private_data, private_data, private_data_len); |
| } |
| |
| static void cm_dup_req_handler(struct cm_work *work, |
| struct cm_id_private *cm_id_priv) |
| { |
| struct ib_mad_send_buf *msg = NULL; |
| int ret; |
| |
| /* Quick state check to discard duplicate REQs. */ |
| if (cm_id_priv->id.state == IB_CM_REQ_RCVD) |
| return; |
| |
| ret = cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg); |
| if (ret) |
| return; |
| |
| spin_lock_irq(&cm_id_priv->lock); |
| switch (cm_id_priv->id.state) { |
| case IB_CM_MRA_REQ_SENT: |
| cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv, |
| CM_MSG_RESPONSE_REQ, cm_id_priv->service_timeout, |
| cm_id_priv->private_data, |
| cm_id_priv->private_data_len); |
| break; |
| case IB_CM_TIMEWAIT: |
| cm_format_rej((struct cm_rej_msg *) msg->mad, cm_id_priv, |
| IB_CM_REJ_STALE_CONN, NULL, 0, NULL, 0); |
| break; |
| default: |
| goto unlock; |
| } |
| spin_unlock_irq(&cm_id_priv->lock); |
| |
| ret = ib_post_send_mad(msg, NULL); |
| if (ret) |
| goto free; |
| return; |
| |
| unlock: spin_unlock_irq(&cm_id_priv->lock); |
| free: cm_free_msg(msg); |
| } |
| |
| static struct cm_id_private * cm_match_req(struct cm_work *work, |
| struct cm_id_private *cm_id_priv) |
| { |
| struct cm_id_private *listen_cm_id_priv, *cur_cm_id_priv; |
| struct cm_timewait_info *timewait_info; |
| struct cm_req_msg *req_msg; |
| |
| req_msg = (struct cm_req_msg *)work->mad_recv_wc->recv_buf.mad; |
| |
| /* Check for possible duplicate REQ. */ |
| spin_lock_irq(&cm.lock); |
| timewait_info = cm_insert_remote_id(cm_id_priv->timewait_info); |
| if (timewait_info) { |
| cur_cm_id_priv = cm_get_id(timewait_info->work.local_id, |
| timewait_info->work.remote_id); |
| spin_unlock_irq(&cm.lock); |
| if (cur_cm_id_priv) { |
| cm_dup_req_handler(work, cur_cm_id_priv); |
| cm_deref_id(cur_cm_id_priv); |
| } |
| return NULL; |
| } |
| |
| /* Check for stale connections. */ |
| timewait_info = cm_insert_remote_qpn(cm_id_priv->timewait_info); |
| if (timewait_info) { |
| cm_cleanup_timewait(cm_id_priv->timewait_info); |
| 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); |
| return NULL; |
| } |
| |
| /* Find matching listen request. */ |
| listen_cm_id_priv = cm_find_listen(cm_id_priv->id.device, |
| req_msg->service_id, |
| req_msg->private_data); |
| if (!listen_cm_id_priv) { |
| cm_cleanup_timewait(cm_id_priv->timewait_info); |
| spin_unlock_irq(&cm.lock); |
| cm_issue_rej(work->port, work->mad_recv_wc, |
| IB_CM_REJ_INVALID_SERVICE_ID, CM_MSG_RESPONSE_REQ, |
| NULL, 0); |
| goto out; |
| } |
| atomic_inc(&listen_cm_id_priv->refcount); |
| atomic_inc(&cm_id_priv->refcount); |
| cm_id_priv->id.state = IB_CM_REQ_RCVD; |
| atomic_inc(&cm_id_priv->work_count); |
| spin_unlock_irq(&cm.lock); |
| out: |
| return listen_cm_id_priv; |
| } |
| |
| static int cm_req_handler(struct cm_work *work) |
| { |
| struct ib_cm_id *cm_id; |
| struct cm_id_private *cm_id_priv, *listen_cm_id_priv; |
| struct cm_req_msg *req_msg; |
| int ret; |
| |
| req_msg = (struct cm_req_msg *)work->mad_recv_wc->recv_buf.mad; |
| |
| cm_id = ib_create_cm_id(work->port->cm_dev->device, NULL, NULL); |
| if (IS_ERR(cm_id)) |
| return PTR_ERR(cm_id); |
| |
| cm_id_priv = container_of(cm_id, struct cm_id_private, id); |
| cm_id_priv->id.remote_id = req_msg->local_comm_id; |
| cm_init_av_for_response(work->port, work->mad_recv_wc->wc, |
| work->mad_recv_wc->recv_buf.grh, |
| &cm_id_priv->av); |
| cm_id_priv->timewait_info = cm_create_timewait_info(cm_id_priv-> |
| id.local_id); |
| if (IS_ERR(cm_id_priv->timewait_info)) { |
| ret = PTR_ERR(cm_id_priv->timewait_info); |
| goto destroy; |
| } |
| cm_id_priv->timewait_info->work.remote_id = req_msg->local_comm_id; |
| cm_id_priv->timewait_info->remote_ca_guid = req_msg->local_ca_guid; |
| cm_id_priv->timewait_info->remote_qpn = cm_req_get_local_qpn(req_msg); |
| |
| listen_cm_id_priv = cm_match_req(work, cm_id_priv); |
| if (!listen_cm_id_priv) { |
| ret = -EINVAL; |
| kfree(cm_id_priv->timewait_info); |
| goto destroy; |
| } |
| |
| cm_id_priv->id.cm_handler = listen_cm_id_priv->id.cm_handler; |
| cm_id_priv->id.context = listen_cm_id_priv->id.context; |
| cm_id_priv->id.service_id = req_msg->service_id; |
| cm_id_priv->id.service_mask = __constant_cpu_to_be64(~0ULL); |
| |
| cm_format_paths_from_req(req_msg, &work->path[0], &work->path[1]); |
| ret = cm_init_av_by_path(&work->path[0], &cm_id_priv->av); |
| if (ret) { |
| ib_get_cached_gid(work->port->cm_dev->device, |
| work->port->port_num, 0, &work->path[0].sgid); |
| ib_send_cm_rej(cm_id, IB_CM_REJ_INVALID_GID, |
| &work->path[0].sgid, sizeof work->path[0].sgid, |
| NULL, 0); |
| goto rejected; |
| } |
| if (req_msg->alt_local_lid) { |
| ret = cm_init_av_by_path(&work->path[1], &cm_id_priv->alt_av); |
| if (ret) { |
| ib_send_cm_rej(cm_id, IB_CM_REJ_INVALID_ALT_GID, |
| &work->path[0].sgid, |
| sizeof work->path[0].sgid, NULL, 0); |
| goto rejected; |
| } |
| } |
| cm_id_priv->tid = req_msg->hdr.tid; |
| cm_id_priv->timeout_ms = cm_convert_to_ms( |
| cm_req_get_local_resp_timeout(req_msg)); |
| cm_id_priv->max_cm_retries = cm_req_get_max_cm_retries(req_msg); |
| cm_id_priv->remote_qpn = cm_req_get_local_qpn(req_msg); |
| cm_id_priv->initiator_depth = cm_req_get_resp_res(req_msg); |
| cm_id_priv->responder_resources = cm_req_get_init_depth(req_msg); |
| cm_id_priv->path_mtu = cm_req_get_path_mtu(req_msg); |
| cm_id_priv->pkey = req_msg->pkey; |
| cm_id_priv->sq_psn = cm_req_get_starting_psn(req_msg); |
| cm_id_priv->retry_count = cm_req_get_retry_count(req_msg); |
| cm_id_priv->rnr_retry_count = cm_req_get_rnr_retry_count(req_msg); |
| cm_id_priv->qp_type = cm_req_get_qp_type(req_msg); |
| |
| cm_format_req_event(work, cm_id_priv, &listen_cm_id_priv->id); |
| cm_process_work(cm_id_priv, work); |
| cm_deref_id(listen_cm_id_priv); |
| return 0; |
| |
| rejected: |
| atomic_dec(&cm_id_priv->refcount); |
| cm_deref_id(listen_cm_id_priv); |
| destroy: |
| ib_destroy_cm_id(cm_id); |
| return ret; |
| } |
| |
| static void cm_format_rep(struct cm_rep_msg *rep_msg, |
| struct cm_id_private *cm_id_priv, |
| struct ib_cm_rep_param *param) |
| { |
| cm_format_mad_hdr(&rep_msg->hdr, CM_REP_ATTR_ID, cm_id_priv->tid); |
| rep_msg->local_comm_id = cm_id_priv->id.local_id; |
| rep_msg->remote_comm_id = cm_id_priv->id.remote_id; |
| cm_rep_set_local_qpn(rep_msg, cpu_to_be32(param->qp_num)); |
| cm_rep_set_starting_psn(rep_msg, cpu_to_be32(param->starting_psn)); |
| rep_msg->resp_resources = param->responder_resources; |
| rep_msg->initiator_depth = param->initiator_depth; |
| cm_rep_set_target_ack_delay(rep_msg, |
| cm_id_priv->av.port->cm_dev->ack_delay); |
| cm_rep_set_failover(rep_msg, param->failover_accepted); |
| cm_rep_set_flow_ctrl(rep_msg, param->flow_control); |
| cm_rep_set_rnr_retry_count(rep_msg, param->rnr_retry_count); |
| cm_rep_set_srq(rep_msg, param->srq); |
| rep_msg->local_ca_guid = cm_id_priv->id.device->node_guid; |
| |
| if (param->private_data && param->private_data_len) |
| memcpy(rep_msg->private_data, param->private_data, |
| param->private_data_len); |
| } |
| |
| int ib_send_cm_rep(struct ib_cm_id *cm_id, |
| struct ib_cm_rep_param *param) |
| { |
| struct cm_id_private *cm_id_priv; |
| struct ib_mad_send_buf *msg; |
| struct cm_rep_msg *rep_msg; |
| unsigned long flags; |
| int ret; |
| |
| if (param->private_data && |
| param->private_data_len > IB_CM_REP_PRIVATE_DATA_SIZE) |
| return -EINVAL; |
| |
| cm_id_priv = container_of(cm_id, struct cm_id_private, id); |
| spin_lock_irqsave(&cm_id_priv->lock, flags); |
| if (cm_id->state != IB_CM_REQ_RCVD && |
| cm_id->state != IB_CM_MRA_REQ_SENT) { |
| ret = -EINVAL; |
| goto out; |
| } |
| |
| ret = cm_alloc_msg(cm_id_priv, &msg); |
| if (ret) |
| goto out; |
| |
| rep_msg = (struct cm_rep_msg *) msg->mad; |
| cm_format_rep(rep_msg, cm_id_priv, param); |
| msg->timeout_ms = cm_id_priv->timeout_ms; |
| msg->context[1] = (void *) (unsigned long) IB_CM_REP_SENT; |
| |
| ret = ib_post_send_mad(msg, NULL); |
| if (ret) { |
| spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| cm_free_msg(msg); |
| return ret; |
| } |
| |
| cm_id->state = IB_CM_REP_SENT; |
| cm_id_priv->msg = msg; |
| cm_id_priv->initiator_depth = param->initiator_depth; |
| cm_id_priv->responder_resources = param->responder_resources; |
| cm_id_priv->rq_psn = cm_rep_get_starting_psn(rep_msg); |
| cm_id_priv->local_qpn = cm_rep_get_local_qpn(rep_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); |
| rtu_msg->local_comm_id = cm_id_priv->id.local_id; |
| rtu_msg->remote_comm_id = cm_id_priv->id.remote_id; |
| |
| if (private_data && private_data_len) |
| memcpy(rtu_msg->private_data, private_data, private_data_len); |
| } |
| |
| int ib_send_cm_rtu(struct ib_cm_id *cm_id, |
| const void *private_data, |
| u8 private_data_len) |
| { |
| struct cm_id_private *cm_id_priv; |
| struct ib_mad_send_buf *msg; |
| unsigned long flags; |
| void *data; |
| int ret; |
| |
| if (private_data && private_data_len > IB_CM_RTU_PRIVATE_DATA_SIZE) |
| return -EINVAL; |
| |
| data = cm_copy_private_data(private_data, private_data_len); |
| if (IS_ERR(data)) |
| return PTR_ERR(data); |
| |
| cm_id_priv = container_of(cm_id, struct cm_id_private, id); |
| spin_lock_irqsave(&cm_id_priv->lock, flags); |
| if (cm_id->state != IB_CM_REP_RCVD && |
| cm_id->state != IB_CM_MRA_REP_SENT) { |
| ret = -EINVAL; |
| goto error; |
| } |
| |
| ret = cm_alloc_msg(cm_id_priv, &msg); |
| if (ret) |
| goto error; |
| |
| cm_format_rtu((struct cm_rtu_msg *) msg->mad, cm_id_priv, |
| private_data, private_data_len); |
| |
| ret = ib_post_send_mad(msg, NULL); |
| if (ret) { |
| spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| cm_free_msg(msg); |
| kfree(data); |
| return ret; |
| } |
| |
| cm_id->state = IB_CM_ESTABLISHED; |
| cm_set_private_data(cm_id_priv, data, private_data_len); |
| spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| return 0; |
| |
| error: spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| kfree(data); |
| return ret; |
| } |
| EXPORT_SYMBOL(ib_send_cm_rtu); |
| |
| static void cm_format_rep_event(struct cm_work *work) |
| { |
| struct cm_rep_msg *rep_msg; |
| struct ib_cm_rep_event_param *param; |
| |
| rep_msg = (struct cm_rep_msg *)work->mad_recv_wc->recv_buf.mad; |
| param = &work->cm_event.param.rep_rcvd; |
| param->remote_ca_guid = rep_msg->local_ca_guid; |
| param->remote_qkey = be32_to_cpu(rep_msg->local_qkey); |
| param->remote_qpn = be32_to_cpu(cm_rep_get_local_qpn(rep_msg)); |
| param->starting_psn = be32_to_cpu(cm_rep_get_starting_psn(rep_msg)); |
| param->responder_resources = rep_msg->initiator_depth; |
| param->initiator_depth = rep_msg->resp_resources; |
| param->target_ack_delay = cm_rep_get_target_ack_delay(rep_msg); |
| param->failover_accepted = cm_rep_get_failover(rep_msg); |
| param->flow_control = cm_rep_get_flow_ctrl(rep_msg); |
| param->rnr_retry_count = cm_rep_get_rnr_retry_count(rep_msg); |
| param->srq = cm_rep_get_srq(rep_msg); |
| work->cm_event.private_data = &rep_msg->private_data; |
| } |
| |
| static void cm_dup_rep_handler(struct cm_work *work) |
| { |
| struct cm_id_private *cm_id_priv; |
| struct cm_rep_msg *rep_msg; |
| struct ib_mad_send_buf *msg = NULL; |
| int ret; |
| |
| rep_msg = (struct cm_rep_msg *) work->mad_recv_wc->recv_buf.mad; |
| cm_id_priv = cm_acquire_id(rep_msg->remote_comm_id, |
| rep_msg->local_comm_id); |
| if (!cm_id_priv) |
| return; |
| |
| ret = cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg); |
| if (ret) |
| goto deref; |
| |
| spin_lock_irq(&cm_id_priv->lock); |
| if (cm_id_priv->id.state == IB_CM_ESTABLISHED) |
| cm_format_rtu((struct cm_rtu_msg *) msg->mad, cm_id_priv, |
| cm_id_priv->private_data, |
| cm_id_priv->private_data_len); |
| else if (cm_id_priv->id.state == IB_CM_MRA_REP_SENT) |
| cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv, |
| CM_MSG_RESPONSE_REP, cm_id_priv->service_timeout, |
| cm_id_priv->private_data, |
| cm_id_priv->private_data_len); |
| else |
| goto unlock; |
| spin_unlock_irq(&cm_id_priv->lock); |
| |
| ret = ib_post_send_mad(msg, NULL); |
| if (ret) |
| goto free; |
| goto deref; |
| |
| unlock: spin_unlock_irq(&cm_id_priv->lock); |
| free: cm_free_msg(msg); |
| deref: cm_deref_id(cm_id_priv); |
| } |
| |
| static int cm_rep_handler(struct cm_work *work) |
| { |
| struct cm_id_private *cm_id_priv; |
| struct cm_rep_msg *rep_msg; |
| int ret; |
| |
| rep_msg = (struct cm_rep_msg *)work->mad_recv_wc->recv_buf.mad; |
| cm_id_priv = cm_acquire_id(rep_msg->remote_comm_id, 0); |
| if (!cm_id_priv) { |
| cm_dup_rep_handler(work); |
| return -EINVAL; |
| } |
| |
| cm_format_rep_event(work); |
| |
| spin_lock_irq(&cm_id_priv->lock); |
| switch (cm_id_priv->id.state) { |
| case IB_CM_REQ_SENT: |
| case IB_CM_MRA_REQ_RCVD: |
| break; |
| default: |
| spin_unlock_irq(&cm_id_priv->lock); |
| ret = -EINVAL; |
| goto error; |
| } |
| |
| cm_id_priv->timewait_info->work.remote_id = rep_msg->local_comm_id; |
| cm_id_priv->timewait_info->remote_ca_guid = rep_msg->local_ca_guid; |
| cm_id_priv->timewait_info->remote_qpn = cm_rep_get_local_qpn(rep_msg); |
| |
| 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; |
| goto error; |
| } |
| /* Check for a stale connection. */ |
| if (cm_insert_remote_qpn(cm_id_priv->timewait_info)) { |
| rb_erase(&cm_id_priv->timewait_info->remote_id_node, |
| &cm.remote_id_table); |
| cm_id_priv->timewait_info->inserted_remote_id = 0; |
| 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; |
| goto error; |
| } |
| spin_unlock(&cm.lock); |
| |
| cm_id_priv->id.state = IB_CM_REP_RCVD; |
| cm_id_priv->id.remote_id = rep_msg->local_comm_id; |
| cm_id_priv->remote_qpn = cm_rep_get_local_qpn(rep_msg); |
| cm_id_priv->initiator_depth = rep_msg->resp_resources; |
| cm_id_priv->responder_resources = rep_msg->initiator_depth; |
| cm_id_priv->sq_psn = cm_rep_get_starting_psn(rep_msg); |
| cm_id_priv->rnr_retry_count = cm_rep_get_rnr_retry_count(rep_msg); |
| cm_id_priv->target_ack_delay = cm_rep_get_target_ack_delay(rep_msg); |
| cm_id_priv->av.timeout = |
| cm_ack_timeout(cm_id_priv->target_ack_delay, |
| cm_id_priv->av.timeout - 1); |
| cm_id_priv->alt_av.timeout = |
| cm_ack_timeout(cm_id_priv->target_ack_delay, |
| cm_id_priv->alt_av.timeout - 1); |
| |
| /* todo: handle peer_to_peer */ |
| |
| ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
| ret = atomic_inc_and_test(&cm_id_priv->work_count); |
| if (!ret) |
| list_add_tail(&work->list, &cm_id_priv->work_list); |
| spin_unlock_irq(&cm_id_priv->lock); |
| |
| if (ret) |
| cm_process_work(cm_id_priv, work); |
| else |
| cm_deref_id(cm_id_priv); |
| return 0; |
| |
| error: |
| cm_deref_id(cm_id_priv); |
| return ret; |
| } |
| |
| static int cm_establish_handler(struct cm_work *work) |
| { |
| struct cm_id_private *cm_id_priv; |
| int ret; |
| |
| /* See comment in cm_establish about lookup. */ |
| cm_id_priv = cm_acquire_id(work->local_id, work->remote_id); |
| if (!cm_id_priv) |
| return -EINVAL; |
| |
| spin_lock_irq(&cm_id_priv->lock); |
| if (cm_id_priv->id.state != IB_CM_ESTABLISHED) { |
| spin_unlock_irq(&cm_id_priv->lock); |
| goto out; |
| } |
| |
| ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
| ret = atomic_inc_and_test(&cm_id_priv->work_count); |
| if (!ret) |
| list_add_tail(&work->list, &cm_id_priv->work_list); |
| spin_unlock_irq(&cm_id_priv->lock); |
| |
| if (ret) |
| cm_process_work(cm_id_priv, work); |
| else |
| cm_deref_id(cm_id_priv); |
| return 0; |
| out: |
| cm_deref_id(cm_id_priv); |
| return -EINVAL; |
| } |
| |
| static int cm_rtu_handler(struct cm_work *work) |
| { |
| struct cm_id_private *cm_id_priv; |
| struct cm_rtu_msg *rtu_msg; |
| int ret; |
| |
| rtu_msg = (struct cm_rtu_msg *)work->mad_recv_wc->recv_buf.mad; |
| cm_id_priv = cm_acquire_id(rtu_msg->remote_comm_id, |
| rtu_msg->local_comm_id); |
| if (!cm_id_priv) |
| return -EINVAL; |
| |
| work->cm_event.private_data = &rtu_msg->private_data; |
| |
| spin_lock_irq(&cm_id_priv->lock); |
| if (cm_id_priv->id.state != IB_CM_REP_SENT && |
| cm_id_priv->id.state != IB_CM_MRA_REP_RCVD) { |
| spin_unlock_irq(&cm_id_priv->lock); |
| goto out; |
| } |
| cm_id_priv->id.state = IB_CM_ESTABLISHED; |
| |
| ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
| ret = atomic_inc_and_test(&cm_id_priv->work_count); |
| if (!ret) |
| list_add_tail(&work->list, &cm_id_priv->work_list); |
| spin_unlock_irq(&cm_id_priv->lock); |
| |
| if (ret) |
| cm_process_work(cm_id_priv, work); |
| else |
| cm_deref_id(cm_id_priv); |
| return 0; |
| out: |
| cm_deref_id(cm_id_priv); |
| return -EINVAL; |
| } |
| |
| static void cm_format_dreq(struct cm_dreq_msg *dreq_msg, |
| struct cm_id_private *cm_id_priv, |
| const void *private_data, |
| u8 private_data_len) |
| { |
| cm_format_mad_hdr(&dreq_msg->hdr, CM_DREQ_ATTR_ID, |
| cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_DREQ)); |
| dreq_msg->local_comm_id = cm_id_priv->id.local_id; |
| dreq_msg->remote_comm_id = cm_id_priv->id.remote_id; |
| cm_dreq_set_remote_qpn(dreq_msg, cm_id_priv->remote_qpn); |
| |
| if (private_data && private_data_len) |
| memcpy(dreq_msg->private_data, private_data, private_data_len); |
| } |
| |
| int ib_send_cm_dreq(struct ib_cm_id *cm_id, |
| const void *private_data, |
| u8 private_data_len) |
| { |
| struct cm_id_private *cm_id_priv; |
| struct ib_mad_send_buf *msg; |
| unsigned long flags; |
| int ret; |
| |
| if (private_data && private_data_len > IB_CM_DREQ_PRIVATE_DATA_SIZE) |
| return -EINVAL; |
| |
| cm_id_priv = container_of(cm_id, struct cm_id_private, id); |
| spin_lock_irqsave(&cm_id_priv->lock, flags); |
| if (cm_id->state != IB_CM_ESTABLISHED) { |
| ret = -EINVAL; |
| goto out; |
| } |
| |
| ret = cm_alloc_msg(cm_id_priv, &msg); |
| if (ret) { |
| cm_enter_timewait(cm_id_priv); |
| goto out; |
| } |
| |
| cm_format_dreq((struct cm_dreq_msg *) msg->mad, cm_id_priv, |
| private_data, private_data_len); |
| msg->timeout_ms = cm_id_priv->timeout_ms; |
| msg->context[1] = (void *) (unsigned long) IB_CM_DREQ_SENT; |
| |
| ret = ib_post_send_mad(msg, NULL); |
| if (ret) { |
| cm_enter_timewait(cm_id_priv); |
| spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| cm_free_msg(msg); |
| return ret; |
| } |
| |
| cm_id->state = IB_CM_DREQ_SENT; |
| cm_id_priv->msg = msg; |
| out: spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| return ret; |
| } |
| EXPORT_SYMBOL(ib_send_cm_dreq); |
| |
| static void cm_format_drep(struct cm_drep_msg *drep_msg, |
| struct cm_id_private *cm_id_priv, |
| const void *private_data, |
| u8 private_data_len) |
| { |
| cm_format_mad_hdr(&drep_msg->hdr, CM_DREP_ATTR_ID, cm_id_priv->tid); |
| drep_msg->local_comm_id = cm_id_priv->id.local_id; |
| drep_msg->remote_comm_id = cm_id_priv->id.remote_id; |
| |
| if (private_data && private_data_len) |
| memcpy(drep_msg->private_data, private_data, private_data_len); |
| } |
| |
| int ib_send_cm_drep(struct ib_cm_id *cm_id, |
| const void *private_data, |
| u8 private_data_len) |
| { |
| struct cm_id_private *cm_id_priv; |
| struct ib_mad_send_buf *msg; |
| unsigned long flags; |
| void *data; |
| int ret; |
| |
| if (private_data && private_data_len > IB_CM_DREP_PRIVATE_DATA_SIZE) |
| return -EINVAL; |
| |
| data = cm_copy_private_data(private_data, private_data_len); |
| if (IS_ERR(data)) |
| return PTR_ERR(data); |
| |
| cm_id_priv = container_of(cm_id, struct cm_id_private, id); |
| spin_lock_irqsave(&cm_id_priv->lock, flags); |
| if (cm_id->state != IB_CM_DREQ_RCVD) { |
| spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| kfree(data); |
| return -EINVAL; |
| } |
| |
| cm_set_private_data(cm_id_priv, data, private_data_len); |
| cm_enter_timewait(cm_id_priv); |
| |
| ret = cm_alloc_msg(cm_id_priv, &msg); |
| if (ret) |
| goto out; |
| |
| cm_format_drep((struct cm_drep_msg *) msg->mad, cm_id_priv, |
| private_data, private_data_len); |
| |
| ret = ib_post_send_mad(msg, NULL); |
| if (ret) { |
| spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| cm_free_msg(msg); |
| return ret; |
| } |
| |
| out: spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| return ret; |
| } |
| EXPORT_SYMBOL(ib_send_cm_drep); |
| |
| static int cm_issue_drep(struct cm_port *port, |
| struct ib_mad_recv_wc *mad_recv_wc) |
| { |
| struct ib_mad_send_buf *msg = NULL; |
| struct cm_dreq_msg *dreq_msg; |
| struct cm_drep_msg *drep_msg; |
| int ret; |
| |
| ret = cm_alloc_response_msg(port, mad_recv_wc, &msg); |
| if (ret) |
| return ret; |
| |
| dreq_msg = (struct cm_dreq_msg *) mad_recv_wc->recv_buf.mad; |
| drep_msg = (struct cm_drep_msg *) msg->mad; |
| |
| cm_format_mad_hdr(&drep_msg->hdr, CM_DREP_ATTR_ID, dreq_msg->hdr.tid); |
| drep_msg->remote_comm_id = dreq_msg->local_comm_id; |
| drep_msg->local_comm_id = dreq_msg->remote_comm_id; |
| |
| ret = ib_post_send_mad(msg, NULL); |
| if (ret) |
| cm_free_msg(msg); |
| |
| return ret; |
| } |
| |
| static int cm_dreq_handler(struct cm_work *work) |
| { |
| struct cm_id_private *cm_id_priv; |
| struct cm_dreq_msg *dreq_msg; |
| struct ib_mad_send_buf *msg = NULL; |
| int ret; |
| |
| dreq_msg = (struct cm_dreq_msg *)work->mad_recv_wc->recv_buf.mad; |
| cm_id_priv = cm_acquire_id(dreq_msg->remote_comm_id, |
| dreq_msg->local_comm_id); |
| if (!cm_id_priv) { |
| cm_issue_drep(work->port, work->mad_recv_wc); |
| return -EINVAL; |
| } |
| |
| work->cm_event.private_data = &dreq_msg->private_data; |
| |
| spin_lock_irq(&cm_id_priv->lock); |
| if (cm_id_priv->local_qpn != cm_dreq_get_remote_qpn(dreq_msg)) |
| goto unlock; |
| |
| switch (cm_id_priv->id.state) { |
| case IB_CM_REP_SENT: |
| case IB_CM_DREQ_SENT: |
| ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
| break; |
| case IB_CM_ESTABLISHED: |
| case IB_CM_MRA_REP_RCVD: |
| break; |
| case IB_CM_TIMEWAIT: |
| if (cm_alloc_response_msg(work->port, work->mad_recv_wc, &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 (ib_post_send_mad(msg, NULL)) |
| cm_free_msg(msg); |
| goto deref; |
| default: |
| goto unlock; |
| } |
| cm_id_priv->id.state = IB_CM_DREQ_RCVD; |
| cm_id_priv->tid = dreq_msg->hdr.tid; |
| ret = atomic_inc_and_test(&cm_id_priv->work_count); |
| if (!ret) |
| list_add_tail(&work->list, &cm_id_priv->work_list); |
| spin_unlock_irq(&cm_id_priv->lock); |
| |
| if (ret) |
| cm_process_work(cm_id_priv, work); |
| else |
| cm_deref_id(cm_id_priv); |
| return 0; |
| |
| unlock: spin_unlock_irq(&cm_id_priv->lock); |
| deref: cm_deref_id(cm_id_priv); |
| return -EINVAL; |
| } |
| |
| static int cm_drep_handler(struct cm_work *work) |
| { |
| struct cm_id_private *cm_id_priv; |
| struct cm_drep_msg *drep_msg; |
| int ret; |
| |
| drep_msg = (struct cm_drep_msg *)work->mad_recv_wc->recv_buf.mad; |
| cm_id_priv = cm_acquire_id(drep_msg->remote_comm_id, |
| drep_msg->local_comm_id); |
| if (!cm_id_priv) |
| return -EINVAL; |
| |
| work->cm_event.private_data = &drep_msg->private_data; |
| |
| spin_lock_irq(&cm_id_priv->lock); |
| if (cm_id_priv->id.state != IB_CM_DREQ_SENT && |
| cm_id_priv->id.state != IB_CM_DREQ_RCVD) { |
| spin_unlock_irq(&cm_id_priv->lock); |
| goto out; |
| } |
| cm_enter_timewait(cm_id_priv); |
| |
| ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
| ret = atomic_inc_and_test(&cm_id_priv->work_count); |
| if (!ret) |
| list_add_tail(&work->list, &cm_id_priv->work_list); |
| spin_unlock_irq(&cm_id_priv->lock); |
| |
| if (ret) |
| cm_process_work(cm_id_priv, work); |
| else |
| cm_deref_id(cm_id_priv); |
| return 0; |
| out: |
| cm_deref_id(cm_id_priv); |
| return -EINVAL; |
| } |
| |
| int ib_send_cm_rej(struct ib_cm_id *cm_id, |
| enum ib_cm_rej_reason reason, |
| void *ari, |
| u8 ari_length, |
| const void *private_data, |
| u8 private_data_len) |
| { |
| struct cm_id_private *cm_id_priv; |
| struct ib_mad_send_buf *msg; |
| unsigned long flags; |
| int ret; |
| |
| if ((private_data && private_data_len > IB_CM_REJ_PRIVATE_DATA_SIZE) || |
| (ari && ari_length > IB_CM_REJ_ARI_LENGTH)) |
| return -EINVAL; |
| |
| cm_id_priv = container_of(cm_id, struct cm_id_private, id); |
| |
| spin_lock_irqsave(&cm_id_priv->lock, flags); |
| switch (cm_id->state) { |
| case IB_CM_REQ_SENT: |
| case IB_CM_MRA_REQ_RCVD: |
| case IB_CM_REQ_RCVD: |
| case IB_CM_MRA_REQ_SENT: |
| case IB_CM_REP_RCVD: |
| case IB_CM_MRA_REP_SENT: |
| ret = cm_alloc_msg(cm_id_priv, &msg); |
| if (!ret) |
| cm_format_rej((struct cm_rej_msg *) msg->mad, |
| cm_id_priv, reason, ari, ari_length, |
| private_data, private_data_len); |
| |
| cm_reset_to_idle(cm_id_priv); |
| break; |
| case IB_CM_REP_SENT: |
| case IB_CM_MRA_REP_RCVD: |
| ret = cm_alloc_msg(cm_id_priv, &msg); |
| if (!ret) |
| cm_format_rej((struct cm_rej_msg *) msg->mad, |
| cm_id_priv, reason, ari, ari_length, |
| private_data, private_data_len); |
| |
| cm_enter_timewait(cm_id_priv); |
| break; |
| default: |
| ret = -EINVAL; |
| goto out; |
| } |
| |
| if (ret) |
| goto out; |
| |
| ret = ib_post_send_mad(msg, NULL); |
| if (ret) |
| cm_free_msg(msg); |
| |
| out: spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| return ret; |
| } |
| EXPORT_SYMBOL(ib_send_cm_rej); |
| |
| static void cm_format_rej_event(struct cm_work *work) |
| { |
| struct cm_rej_msg *rej_msg; |
| struct ib_cm_rej_event_param *param; |
| |
| rej_msg = (struct cm_rej_msg *)work->mad_recv_wc->recv_buf.mad; |
| param = &work->cm_event.param.rej_rcvd; |
| param->ari = rej_msg->ari; |
| param->ari_length = cm_rej_get_reject_info_len(rej_msg); |
| param->reason = __be16_to_cpu(rej_msg->reason); |
| work->cm_event.private_data = &rej_msg->private_data; |
| } |
| |
| static struct cm_id_private * cm_acquire_rejected_id(struct cm_rej_msg *rej_msg) |
| { |
| struct cm_timewait_info *timewait_info; |
| struct cm_id_private *cm_id_priv; |
| __be32 remote_id; |
| |
| remote_id = rej_msg->local_comm_id; |
| |
| if (__be16_to_cpu(rej_msg->reason) == IB_CM_REJ_TIMEOUT) { |
| spin_lock_irq(&cm.lock); |
| timewait_info = cm_find_remote_id( *((__be64 *) rej_msg->ari), |
| remote_id); |
| if (!timewait_info) { |
| spin_unlock_irq(&cm.lock); |
| return NULL; |
| } |
| cm_id_priv = idr_find(&cm.local_id_table, (__force int) |
| (timewait_info->work.local_id ^ |
| cm.random_id_operand)); |
| if (cm_id_priv) { |
| if (cm_id_priv->id.remote_id == remote_id) |
| atomic_inc(&cm_id_priv->refcount); |
| else |
| cm_id_priv = NULL; |
| } |
| spin_unlock_irq(&cm.lock); |
| } else if (cm_rej_get_msg_rejected(rej_msg) == CM_MSG_RESPONSE_REQ) |
| cm_id_priv = cm_acquire_id(rej_msg->remote_comm_id, 0); |
| else |
| cm_id_priv = cm_acquire_id(rej_msg->remote_comm_id, remote_id); |
| |
| return cm_id_priv; |
| } |
| |
| static int cm_rej_handler(struct cm_work *work) |
| { |
| struct cm_id_private *cm_id_priv; |
| struct cm_rej_msg *rej_msg; |
| int ret; |
| |
| rej_msg = (struct cm_rej_msg *)work->mad_recv_wc->recv_buf.mad; |
| cm_id_priv = cm_acquire_rejected_id(rej_msg); |
| if (!cm_id_priv) |
| return -EINVAL; |
| |
| cm_format_rej_event(work); |
| |
| spin_lock_irq(&cm_id_priv->lock); |
| switch (cm_id_priv->id.state) { |
| case IB_CM_REQ_SENT: |
| case IB_CM_MRA_REQ_RCVD: |
| case IB_CM_REP_SENT: |
| case IB_CM_MRA_REP_RCVD: |
| ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
| /* fall through */ |
| case IB_CM_REQ_RCVD: |
| case IB_CM_MRA_REQ_SENT: |
| if (__be16_to_cpu(rej_msg->reason) == IB_CM_REJ_STALE_CONN) |
| cm_enter_timewait(cm_id_priv); |
| else |
| cm_reset_to_idle(cm_id_priv); |
| break; |
| case IB_CM_DREQ_SENT: |
| ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
| /* fall through */ |
| case IB_CM_REP_RCVD: |
| case IB_CM_MRA_REP_SENT: |
| case IB_CM_ESTABLISHED: |
| cm_enter_timewait(cm_id_priv); |
| break; |
| default: |
| spin_unlock_irq(&cm_id_priv->lock); |
| ret = -EINVAL; |
| goto out; |
| } |
| |
| ret = atomic_inc_and_test(&cm_id_priv->work_count); |
| if (!ret) |
| list_add_tail(&work->list, &cm_id_priv->work_list); |
| spin_unlock_irq(&cm_id_priv->lock); |
| |
| if (ret) |
| cm_process_work(cm_id_priv, work); |
| else |
| cm_deref_id(cm_id_priv); |
| return 0; |
| out: |
| cm_deref_id(cm_id_priv); |
| return -EINVAL; |
| } |
| |
| int ib_send_cm_mra(struct ib_cm_id *cm_id, |
| u8 service_timeout, |
| const void *private_data, |
| u8 private_data_len) |
| { |
| struct cm_id_private *cm_id_priv; |
| struct ib_mad_send_buf *msg; |
| enum ib_cm_state cm_state; |
| enum ib_cm_lap_state lap_state; |
| enum cm_msg_response msg_response; |
| void *data; |
| unsigned long flags; |
| int ret; |
| |
| if (private_data && private_data_len > IB_CM_MRA_PRIVATE_DATA_SIZE) |
| return -EINVAL; |
| |
| data = cm_copy_private_data(private_data, private_data_len); |
| if (IS_ERR(data)) |
| return PTR_ERR(data); |
| |
| cm_id_priv = container_of(cm_id, struct cm_id_private, id); |
| |
| spin_lock_irqsave(&cm_id_priv->lock, flags); |
| switch(cm_id_priv->id.state) { |
| case IB_CM_REQ_RCVD: |
| cm_state = IB_CM_MRA_REQ_SENT; |
| lap_state = cm_id->lap_state; |
| msg_response = CM_MSG_RESPONSE_REQ; |
| break; |
| case IB_CM_REP_RCVD: |
| cm_state = IB_CM_MRA_REP_SENT; |
| lap_state = cm_id->lap_state; |
| msg_response = CM_MSG_RESPONSE_REP; |
| break; |
| case IB_CM_ESTABLISHED: |
| cm_state = cm_id->state; |
| lap_state = IB_CM_MRA_LAP_SENT; |
| msg_response = CM_MSG_RESPONSE_OTHER; |
| break; |
| default: |
| ret = -EINVAL; |
| goto error1; |
| } |
| |
| if (!(service_timeout & IB_CM_MRA_FLAG_DELAY)) { |
| ret = cm_alloc_msg(cm_id_priv, &msg); |
| if (ret) |
| goto error1; |
| |
| cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv, |
| msg_response, service_timeout, |
| private_data, private_data_len); |
| ret = ib_post_send_mad(msg, NULL); |
| if (ret) |
| goto error2; |
| } |
| |
| cm_id->state = cm_state; |
| cm_id->lap_state = lap_state; |
| cm_id_priv->service_timeout = service_timeout; |
| cm_set_private_data(cm_id_priv, data, private_data_len); |
| spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| return 0; |
| |
| error1: spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| kfree(data); |
| return ret; |
| |
| error2: spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| kfree(data); |
| cm_free_msg(msg); |
| return ret; |
| } |
| EXPORT_SYMBOL(ib_send_cm_mra); |
| |
| static struct cm_id_private * cm_acquire_mraed_id(struct cm_mra_msg *mra_msg) |
| { |
| switch (cm_mra_get_msg_mraed(mra_msg)) { |
| case CM_MSG_RESPONSE_REQ: |
| return cm_acquire_id(mra_msg->remote_comm_id, 0); |
| case CM_MSG_RESPONSE_REP: |
| case CM_MSG_RESPONSE_OTHER: |
| return cm_acquire_id(mra_msg->remote_comm_id, |
| mra_msg->local_comm_id); |
| default: |
| return NULL; |
| } |
| } |
| |
| static int cm_mra_handler(struct cm_work *work) |
| { |
| struct cm_id_private *cm_id_priv; |
| struct cm_mra_msg *mra_msg; |
| int timeout, ret; |
| |
| mra_msg = (struct cm_mra_msg *)work->mad_recv_wc->recv_buf.mad; |
| cm_id_priv = cm_acquire_mraed_id(mra_msg); |
| if (!cm_id_priv) |
| return -EINVAL; |
| |
| work->cm_event.private_data = &mra_msg->private_data; |
| work->cm_event.param.mra_rcvd.service_timeout = |
| cm_mra_get_service_timeout(mra_msg); |
| timeout = cm_convert_to_ms(cm_mra_get_service_timeout(mra_msg)) + |
| cm_convert_to_ms(cm_id_priv->av.timeout); |
| |
| spin_lock_irq(&cm_id_priv->lock); |
| switch (cm_id_priv->id.state) { |
| case IB_CM_REQ_SENT: |
| if (cm_mra_get_msg_mraed(mra_msg) != CM_MSG_RESPONSE_REQ || |
| ib_modify_mad(cm_id_priv->av.port->mad_agent, |
| cm_id_priv->msg, timeout)) |
| goto out; |
| cm_id_priv->id.state = IB_CM_MRA_REQ_RCVD; |
| break; |
| case IB_CM_REP_SENT: |
| if (cm_mra_get_msg_mraed(mra_msg) != CM_MSG_RESPONSE_REP || |
| ib_modify_mad(cm_id_priv->av.port->mad_agent, |
| cm_id_priv->msg, timeout)) |
| goto out; |
| cm_id_priv->id.state = IB_CM_MRA_REP_RCVD; |
| break; |
| case IB_CM_ESTABLISHED: |
| if (cm_mra_get_msg_mraed(mra_msg) != CM_MSG_RESPONSE_OTHER || |
| cm_id_priv->id.lap_state != IB_CM_LAP_SENT || |
| ib_modify_mad(cm_id_priv->av.port->mad_agent, |
| cm_id_priv->msg, timeout)) |
| goto out; |
| cm_id_priv->id.lap_state = IB_CM_MRA_LAP_RCVD; |
| break; |
| default: |
| goto out; |
| } |
| |
| cm_id_priv->msg->context[1] = (void *) (unsigned long) |
| cm_id_priv->id.state; |
| ret = atomic_inc_and_test(&cm_id_priv->work_count); |
| if (!ret) |
| list_add_tail(&work->list, &cm_id_priv->work_list); |
| spin_unlock_irq(&cm_id_priv->lock); |
| |
| if (ret) |
| cm_process_work(cm_id_priv, work); |
| else |
| cm_deref_id(cm_id_priv); |
| return 0; |
| out: |
| spin_unlock_irq(&cm_id_priv->lock); |
| cm_deref_id(cm_id_priv); |
| return -EINVAL; |
| } |
| |
| static void cm_format_lap(struct cm_lap_msg *lap_msg, |
| struct cm_id_private *cm_id_priv, |
| struct ib_sa_path_rec *alternate_path, |
| const void *private_data, |
| u8 private_data_len) |
| { |
| cm_format_mad_hdr(&lap_msg->hdr, CM_LAP_ATTR_ID, |
| cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_LAP)); |
| lap_msg->local_comm_id = cm_id_priv->id.local_id; |
| lap_msg->remote_comm_id = cm_id_priv->id.remote_id; |
| cm_lap_set_remote_qpn(lap_msg, cm_id_priv->remote_qpn); |
| /* todo: need remote CM response timeout */ |
| cm_lap_set_remote_resp_timeout(lap_msg, 0x1F); |
| lap_msg->alt_local_lid = alternate_path->slid; |
| lap_msg->alt_remote_lid = alternate_path->dlid; |
| lap_msg->alt_local_gid = alternate_path->sgid; |
| lap_msg->alt_remote_gid = alternate_path->dgid; |
| cm_lap_set_flow_label(lap_msg, alternate_path->flow_label); |
| cm_lap_set_traffic_class(lap_msg, alternate_path->traffic_class); |
| lap_msg->alt_hop_limit = alternate_path->hop_limit; |
| cm_lap_set_packet_rate(lap_msg, alternate_path->rate); |
| cm_lap_set_sl(lap_msg, alternate_path->sl); |
| cm_lap_set_subnet_local(lap_msg, 1); /* local only... */ |
| cm_lap_set_local_ack_timeout(lap_msg, |
| cm_ack_timeout(cm_id_priv->av.port->cm_dev->ack_delay, |
| alternate_path->packet_life_time)); |
| |
| if (private_data && private_data_len) |
| memcpy(lap_msg->private_data, private_data, private_data_len); |
| } |
| |
| int ib_send_cm_lap(struct ib_cm_id *cm_id, |
| struct ib_sa_path_rec *alternate_path, |
| const void *private_data, |
| u8 private_data_len) |
| { |
| struct cm_id_private *cm_id_priv; |
| struct ib_mad_send_buf *msg; |
| unsigned long flags; |
| int ret; |
| |
| if (private_data && private_data_len > IB_CM_LAP_PRIVATE_DATA_SIZE) |
| return -EINVAL; |
| |
| cm_id_priv = container_of(cm_id, struct cm_id_private, id); |
| spin_lock_irqsave(&cm_id_priv->lock, flags); |
| if (cm_id->state != IB_CM_ESTABLISHED || |
| (cm_id->lap_state != IB_CM_LAP_UNINIT && |
| cm_id->lap_state != IB_CM_LAP_IDLE)) { |
| ret = -EINVAL; |
| goto out; |
| } |
| |
| ret = cm_init_av_by_path(alternate_path, &cm_id_priv->alt_av); |
| if (ret) |
| goto out; |
| cm_id_priv->alt_av.timeout = |
| cm_ack_timeout(cm_id_priv->target_ack_delay, |
| cm_id_priv->alt_av.timeout - 1); |
| |
| ret = cm_alloc_msg(cm_id_priv, &msg); |
| if (ret) |
| goto out; |
| |
| cm_format_lap((struct cm_lap_msg *) msg->mad, cm_id_priv, |
| alternate_path, private_data, private_data_len); |
| msg->timeout_ms = cm_id_priv->timeout_ms; |
| msg->context[1] = (void *) (unsigned long) IB_CM_ESTABLISHED; |
| |
| ret = ib_post_send_mad(msg, NULL); |
| if (ret) { |
| spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| cm_free_msg(msg); |
| return ret; |
| } |
| |
| cm_id->lap_state = IB_CM_LAP_SENT; |
| cm_id_priv->msg = msg; |
| |
| out: spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| return ret; |
| } |
| EXPORT_SYMBOL(ib_send_cm_lap); |
| |
| static void cm_format_path_from_lap(struct cm_id_private *cm_id_priv, |
| struct ib_sa_path_rec *path, |
| struct cm_lap_msg *lap_msg) |
| { |
| memset(path, 0, sizeof *path); |
| path->dgid = lap_msg->alt_local_gid; |
| path->sgid = lap_msg->alt_remote_gid; |
| path->dlid = lap_msg->alt_local_lid; |
| path->slid = lap_msg->alt_remote_lid; |
| path->flow_label = cm_lap_get_flow_label(lap_msg); |
| path->hop_limit = lap_msg->alt_hop_limit; |
| path->traffic_class = cm_lap_get_traffic_class(lap_msg); |
| path->reversible = 1; |
| path->pkey = cm_id_priv->pkey; |
| path->sl = cm_lap_get_sl(lap_msg); |
| path->mtu_selector = IB_SA_EQ; |
| path->mtu = cm_id_priv->path_mtu; |
| path->rate_selector = IB_SA_EQ; |
| path->rate = cm_lap_get_packet_rate(lap_msg); |
| path->packet_life_time_selector = IB_SA_EQ; |
| path->packet_life_time = cm_lap_get_local_ack_timeout(lap_msg); |
| path->packet_life_time -= (path->packet_life_time > 0); |
| } |
| |
| static int cm_lap_handler(struct cm_work *work) |
| { |
| struct cm_id_private *cm_id_priv; |
| struct cm_lap_msg *lap_msg; |
| struct ib_cm_lap_event_param *param; |
| struct ib_mad_send_buf *msg = NULL; |
| int ret; |
| |
| /* todo: verify LAP request and send reject APR if invalid. */ |
| lap_msg = (struct cm_lap_msg *)work->mad_recv_wc->recv_buf.mad; |
| cm_id_priv = cm_acquire_id(lap_msg->remote_comm_id, |
| lap_msg->local_comm_id); |
| if (!cm_id_priv) |
| return -EINVAL; |
| |
| param = &work->cm_event.param.lap_rcvd; |
| param->alternate_path = &work->path[0]; |
| cm_format_path_from_lap(cm_id_priv, param->alternate_path, lap_msg); |
| work->cm_event.private_data = &lap_msg->private_data; |
| |
| spin_lock_irq(&cm_id_priv->lock); |
| if (cm_id_priv->id.state != IB_CM_ESTABLISHED) |
| goto unlock; |
| |
| switch (cm_id_priv->id.lap_state) { |
| case IB_CM_LAP_UNINIT: |
| case IB_CM_LAP_IDLE: |
| break; |
| case IB_CM_MRA_LAP_SENT: |
| if (cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg)) |
| goto unlock; |
| |
| cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv, |
| CM_MSG_RESPONSE_OTHER, |
| cm_id_priv->service_timeout, |
| cm_id_priv->private_data, |
| cm_id_priv->private_data_len); |
| spin_unlock_irq(&cm_id_priv->lock); |
| |
| if (ib_post_send_mad(msg, NULL)) |
| cm_free_msg(msg); |
| goto deref; |
| default: |
| goto unlock; |
| } |
| |
| cm_id_priv->id.lap_state = IB_CM_LAP_RCVD; |
| cm_id_priv->tid = lap_msg->hdr.tid; |
| cm_init_av_for_response(work->port, work->mad_recv_wc->wc, |
| work->mad_recv_wc->recv_buf.grh, |
| &cm_id_priv->av); |
| cm_init_av_by_path(param->alternate_path, &cm_id_priv->alt_av); |
| ret = atomic_inc_and_test(&cm_id_priv->work_count); |
| if (!ret) |
| list_add_tail(&work->list, &cm_id_priv->work_list); |
| spin_unlock_irq(&cm_id_priv->lock); |
| |
| if (ret) |
| cm_process_work(cm_id_priv, work); |
| else |
| cm_deref_id(cm_id_priv); |
| return 0; |
| |
| unlock: spin_unlock_irq(&cm_id_priv->lock); |
| deref: cm_deref_id(cm_id_priv); |
| return -EINVAL; |
| } |
| |
| static void cm_format_apr(struct cm_apr_msg *apr_msg, |
| struct cm_id_private *cm_id_priv, |
| enum ib_cm_apr_status status, |
| void *info, |
| u8 info_length, |
| const void *private_data, |
| u8 private_data_len) |
| { |
| cm_format_mad_hdr(&apr_msg->hdr, CM_APR_ATTR_ID, cm_id_priv->tid); |
| apr_msg->local_comm_id = cm_id_priv->id.local_id; |
| apr_msg->remote_comm_id = cm_id_priv->id.remote_id; |
| apr_msg->ap_status = (u8) status; |
| |
| if (info && info_length) { |
| apr_msg->info_length = info_length; |
| memcpy(apr_msg->info, info, info_length); |
| } |
| |
| if (private_data && private_data_len) |
| memcpy(apr_msg->private_data, private_data, private_data_len); |
| } |
| |
| int ib_send_cm_apr(struct ib_cm_id *cm_id, |
| enum ib_cm_apr_status status, |
| void *info, |
| u8 info_length, |
| const void *private_data, |
| u8 private_data_len) |
| { |
| struct cm_id_private *cm_id_priv; |
| struct ib_mad_send_buf *msg; |
| unsigned long flags; |
| int ret; |
| |
| if ((private_data && private_data_len > IB_CM_APR_PRIVATE_DATA_SIZE) || |
| (info && info_length > IB_CM_APR_INFO_LENGTH)) |
| return -EINVAL; |
| |
| cm_id_priv = container_of(cm_id, struct cm_id_private, id); |
| spin_lock_irqsave(&cm_id_priv->lock, flags); |
| if (cm_id->state != IB_CM_ESTABLISHED || |
| (cm_id->lap_state != IB_CM_LAP_RCVD && |
| cm_id->lap_state != IB_CM_MRA_LAP_SENT)) { |
| ret = -EINVAL; |
| goto out; |
| } |
| |
| ret = cm_alloc_msg(cm_id_priv, &msg); |
| if (ret) |
| goto out; |
| |
| cm_format_apr((struct cm_apr_msg *) msg->mad, cm_id_priv, status, |
| info, info_length, private_data, private_data_len); |
| ret = ib_post_send_mad(msg, NULL); |
| if (ret) { |
| spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| cm_free_msg(msg); |
| return ret; |
| } |
| |
| cm_id->lap_state = IB_CM_LAP_IDLE; |
| out: spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| return ret; |
| } |
| EXPORT_SYMBOL(ib_send_cm_apr); |
| |
| static int cm_apr_handler(struct cm_work *work) |
| { |
| struct cm_id_private *cm_id_priv; |
| struct cm_apr_msg *apr_msg; |
| int ret; |
| |
| apr_msg = (struct cm_apr_msg *)work->mad_recv_wc->recv_buf.mad; |
| cm_id_priv = cm_acquire_id(apr_msg->remote_comm_id, |
| apr_msg->local_comm_id); |
| if (!cm_id_priv) |
| return -EINVAL; /* Unmatched reply. */ |
| |
| work->cm_event.param.apr_rcvd.ap_status = apr_msg->ap_status; |
| work->cm_event.param.apr_rcvd.apr_info = &apr_msg->info; |
| work->cm_event.param.apr_rcvd.info_len = apr_msg->info_length; |
| work->cm_event.private_data = &apr_msg->private_data; |
| |
| spin_lock_irq(&cm_id_priv->lock); |
| if (cm_id_priv->id.state != IB_CM_ESTABLISHED || |
| (cm_id_priv->id.lap_state != IB_CM_LAP_SENT && |
| cm_id_priv->id.lap_state != IB_CM_MRA_LAP_RCVD)) { |
| spin_unlock_irq(&cm_id_priv->lock); |
| goto out; |
| } |
| cm_id_priv->id.lap_state = IB_CM_LAP_IDLE; |
| ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
| cm_id_priv->msg = NULL; |
| |
| ret = atomic_inc_and_test(&cm_id_priv->work_count); |
| if (!ret) |
| list_add_tail(&work->list, &cm_id_priv->work_list); |
| spin_unlock_irq(&cm_id_priv->lock); |
| |
| if (ret) |
| cm_process_work(cm_id_priv, work); |
| else |
| cm_deref_id(cm_id_priv); |
| return 0; |
| out: |
| cm_deref_id(cm_id_priv); |
| return -EINVAL; |
| } |
| |
| static int cm_timewait_handler(struct cm_work *work) |
| { |
| struct cm_timewait_info *timewait_info; |
| struct cm_id_private *cm_id_priv; |
| int ret; |
| |
| timewait_info = (struct cm_timewait_info *)work; |
| spin_lock_irq(&cm.lock); |
| list_del(&timewait_info->list); |
| spin_unlock_irq(&cm.lock); |
| |
| cm_id_priv = cm_acquire_id(timewait_info->work.local_id, |
| timewait_info->work.remote_id); |
| if (!cm_id_priv) |
| return -EINVAL; |
| |
| spin_lock_irq(&cm_id_priv->lock); |
| if (cm_id_priv->id.state != IB_CM_TIMEWAIT || |
| cm_id_priv->remote_qpn != timewait_info->remote_qpn) { |
| spin_unlock_irq(&cm_id_priv->lock); |
| goto out; |
| } |
| cm_id_priv->id.state = IB_CM_IDLE; |
| ret = atomic_inc_and_test(&cm_id_priv->work_count); |
| if (!ret) |
| list_add_tail(&work->list, &cm_id_priv->work_list); |
| spin_unlock_irq(&cm_id_priv->lock); |
| |
| if (ret) |
| cm_process_work(cm_id_priv, work); |
| else |
| cm_deref_id(cm_id_priv); |
| return 0; |
| out: |
| cm_deref_id(cm_id_priv); |
| return -EINVAL; |
| } |
| |
| static void cm_format_sidr_req(struct cm_sidr_req_msg *sidr_req_msg, |
| struct cm_id_private *cm_id_priv, |
| struct ib_cm_sidr_req_param *param) |
| { |
| cm_format_mad_hdr(&sidr_req_msg->hdr, CM_SIDR_REQ_ATTR_ID, |
| cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_SIDR)); |
| sidr_req_msg->request_id = cm_id_priv->id.local_id; |
| sidr_req_msg->pkey = cpu_to_be16(param->path->pkey); |
| sidr_req_msg->service_id = param->service_id; |
| |
| if (param->private_data && param->private_data_len) |
| memcpy(sidr_req_msg->private_data, param->private_data, |
| param->private_data_len); |
| } |
| |
| int ib_send_cm_sidr_req(struct ib_cm_id *cm_id, |
| struct ib_cm_sidr_req_param *param) |
| { |
| struct cm_id_private *cm_id_priv; |
| struct ib_mad_send_buf *msg; |
| unsigned long flags; |
| int ret; |
| |
| if (!param->path || (param->private_data && |
| param->private_data_len > IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE)) |
| return -EINVAL; |
| |
| cm_id_priv = container_of(cm_id, struct cm_id_private, id); |
| ret = cm_init_av_by_path(param->path, &cm_id_priv->av); |
| if (ret) |
| goto out; |
| |
| cm_id->service_id = param->service_id; |
| cm_id->service_mask = __constant_cpu_to_be64(~0ULL); |
| cm_id_priv->timeout_ms = param->timeout_ms; |
| cm_id_priv->max_cm_retries = param->max_cm_retries; |
| ret = cm_alloc_msg(cm_id_priv, &msg); |
| if (ret) |
| goto out; |
| |
| cm_format_sidr_req((struct cm_sidr_req_msg *) msg->mad, cm_id_priv, |
| param); |
| msg->timeout_ms = cm_id_priv->timeout_ms; |
| msg->context[1] = (void *) (unsigned long) IB_CM_SIDR_REQ_SENT; |
| |
| spin_lock_irqsave(&cm_id_priv->lock, flags); |
| if (cm_id->state == IB_CM_IDLE) |
| ret = ib_post_send_mad(msg, NULL); |
| else |
| ret = -EINVAL; |
| |
| if (ret) { |
| spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| cm_free_msg(msg); |
| goto out; |
| } |
| cm_id->state = IB_CM_SIDR_REQ_SENT; |
| cm_id_priv->msg = msg; |
| spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| out: |
| return ret; |
| } |
| EXPORT_SYMBOL(ib_send_cm_sidr_req); |
| |
| static void cm_format_sidr_req_event(struct cm_work *work, |
| struct ib_cm_id *listen_id) |
| { |
| struct cm_sidr_req_msg *sidr_req_msg; |
| struct ib_cm_sidr_req_event_param *param; |
| |
| sidr_req_msg = (struct cm_sidr_req_msg *) |
| work->mad_recv_wc->recv_buf.mad; |
| param = &work->cm_event.param.sidr_req_rcvd; |
| param->pkey = __be16_to_cpu(sidr_req_msg->pkey); |
| param->listen_id = listen_id; |
| param->port = work->port->port_num; |
| work->cm_event.private_data = &sidr_req_msg->private_data; |
| } |
| |
| static int cm_sidr_req_handler(struct cm_work *work) |
| { |
| struct ib_cm_id *cm_id; |
| struct cm_id_private *cm_id_priv, *cur_cm_id_priv; |
| struct cm_sidr_req_msg *sidr_req_msg; |
| struct ib_wc *wc; |
| |
| cm_id = ib_create_cm_id(work->port->cm_dev->device, NULL, NULL); |
| if (IS_ERR(cm_id)) |
| return PTR_ERR(cm_id); |
| cm_id_priv = container_of(cm_id, struct cm_id_private, id); |
| |
| /* Record SGID/SLID and request ID for lookup. */ |
| sidr_req_msg = (struct cm_sidr_req_msg *) |
| work->mad_recv_wc->recv_buf.mad; |
| wc = work->mad_recv_wc->wc; |
| cm_id_priv->av.dgid.global.subnet_prefix = cpu_to_be64(wc->slid); |
| cm_id_priv->av.dgid.global.interface_id = 0; |
| cm_init_av_for_response(work->port, work->mad_recv_wc->wc, |
| work->mad_recv_wc->recv_buf.grh, |
| &cm_id_priv->av); |
| cm_id_priv->id.remote_id = sidr_req_msg->request_id; |
| cm_id_priv->tid = sidr_req_msg->hdr.tid; |
| atomic_inc(&cm_id_priv->work_count); |
| |
| spin_lock_irq(&cm.lock); |
| cur_cm_id_priv = cm_insert_remote_sidr(cm_id_priv); |
| if (cur_cm_id_priv) { |
| spin_unlock_irq(&cm.lock); |
| goto out; /* Duplicate message. */ |
| } |
| cm_id_priv->id.state = IB_CM_SIDR_REQ_RCVD; |
| cur_cm_id_priv = cm_find_listen(cm_id->device, |
| sidr_req_msg->service_id, |
| sidr_req_msg->private_data); |
| if (!cur_cm_id_priv) { |
| spin_unlock_irq(&cm.lock); |
| cm_reject_sidr_req(cm_id_priv, IB_SIDR_UNSUPPORTED); |
| goto out; /* No match. */ |
| } |
| atomic_inc(&cur_cm_id_priv->refcount); |
| spin_unlock_irq(&cm.lock); |
| |
| cm_id_priv->id.cm_handler = cur_cm_id_priv->id.cm_handler; |
| cm_id_priv->id.context = cur_cm_id_priv->id.context; |
| cm_id_priv->id.service_id = sidr_req_msg->service_id; |
| cm_id_priv->id.service_mask = __constant_cpu_to_be64(~0ULL); |
| |
| cm_format_sidr_req_event(work, &cur_cm_id_priv->id); |
| cm_process_work(cm_id_priv, work); |
| cm_deref_id(cur_cm_id_priv); |
| return 0; |
| out: |
| ib_destroy_cm_id(&cm_id_priv->id); |
| return -EINVAL; |
| } |
| |
| static void cm_format_sidr_rep(struct cm_sidr_rep_msg *sidr_rep_msg, |
| struct cm_id_private *cm_id_priv, |
| struct ib_cm_sidr_rep_param *param) |
| { |
| cm_format_mad_hdr(&sidr_rep_msg->hdr, CM_SIDR_REP_ATTR_ID, |
| cm_id_priv->tid); |
| sidr_rep_msg->request_id = cm_id_priv->id.remote_id; |
| sidr_rep_msg->status = param->status; |
| cm_sidr_rep_set_qpn(sidr_rep_msg, cpu_to_be32(param->qp_num)); |
| sidr_rep_msg->service_id = cm_id_priv->id.service_id; |
| sidr_rep_msg->qkey = cpu_to_be32(param->qkey); |
| |
| if (param->info && param->info_length) |
| memcpy(sidr_rep_msg->info, param->info, param->info_length); |
| |
| if (param->private_data && param->private_data_len) |
| memcpy(sidr_rep_msg->private_data, param->private_data, |
| param->private_data_len); |
| } |
| |
| int ib_send_cm_sidr_rep(struct ib_cm_id *cm_id, |
| struct ib_cm_sidr_rep_param *param) |
| { |
| struct cm_id_private *cm_id_priv; |
| struct ib_mad_send_buf *msg; |
| unsigned long flags; |
| int ret; |
| |
| if ((param->info && param->info_length > IB_CM_SIDR_REP_INFO_LENGTH) || |
| (param->private_data && |
| param->private_data_len > IB_CM_SIDR_REP_PRIVATE_DATA_SIZE)) |
| return -EINVAL; |
| |
| cm_id_priv = container_of(cm_id, struct cm_id_private, id); |
| spin_lock_irqsave(&cm_id_priv->lock, flags); |
| if (cm_id->state != IB_CM_SIDR_REQ_RCVD) { |
| ret = -EINVAL; |
| goto error; |
| } |
| |
| ret = cm_alloc_msg(cm_id_priv, &msg); |
| if (ret) |
| goto error; |
| |
| cm_format_sidr_rep((struct cm_sidr_rep_msg *) msg->mad, cm_id_priv, |
| param); |
| ret = ib_post_send_mad(msg, NULL); |
| if (ret) { |
| spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| cm_free_msg(msg); |
| return ret; |
| } |
| cm_id->state = IB_CM_IDLE; |
| spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| |
| spin_lock_irqsave(&cm.lock, flags); |
| rb_erase(&cm_id_priv->sidr_id_node, &cm.remote_sidr_table); |
| spin_unlock_irqrestore(&cm.lock, flags); |
| return 0; |
| |
| error: spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| return ret; |
| } |
| EXPORT_SYMBOL(ib_send_cm_sidr_rep); |
| |
| static void cm_format_sidr_rep_event(struct cm_work *work) |
| { |
| struct cm_sidr_rep_msg *sidr_rep_msg; |
| struct ib_cm_sidr_rep_event_param *param; |
| |
| sidr_rep_msg = (struct cm_sidr_rep_msg *) |
| work->mad_recv_wc->recv_buf.mad; |
| param = &work->cm_event.param.sidr_rep_rcvd; |
| param->status = sidr_rep_msg->status; |
| param->qkey = be32_to_cpu(sidr_rep_msg->qkey); |
| param->qpn = be32_to_cpu(cm_sidr_rep_get_qpn(sidr_rep_msg)); |
| param->info = &sidr_rep_msg->info; |
| param->info_len = sidr_rep_msg->info_length; |
| work->cm_event.private_data = &sidr_rep_msg->private_data; |
| } |
| |
| static int cm_sidr_rep_handler(struct cm_work *work) |
| { |
| struct cm_sidr_rep_msg *sidr_rep_msg; |
| struct cm_id_private *cm_id_priv; |
| |
| sidr_rep_msg = (struct cm_sidr_rep_msg *) |
| work->mad_recv_wc->recv_buf.mad; |
| cm_id_priv = cm_acquire_id(sidr_rep_msg->request_id, 0); |
| if (!cm_id_priv) |
| return -EINVAL; /* Unmatched reply. */ |
| |
| spin_lock_irq(&cm_id_priv->lock); |
| if (cm_id_priv->id.state != IB_CM_SIDR_REQ_SENT) { |
| spin_unlock_irq(&cm_id_priv->lock); |
| goto out; |
| } |
| cm_id_priv->id.state = IB_CM_IDLE; |
| ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
| spin_unlock_irq(&cm_id_priv->lock); |
| |
| cm_format_sidr_rep_event(work); |
| cm_process_work(cm_id_priv, work); |
| return 0; |
| out: |
| cm_deref_id(cm_id_priv); |
| return -EINVAL; |
| } |
| |
| static void cm_process_send_error(struct ib_mad_send_buf *msg, |
| enum ib_wc_status wc_status) |
| { |
| struct cm_id_private *cm_id_priv; |
| struct ib_cm_event cm_event; |
| enum ib_cm_state state; |
| int ret; |
| |
| memset(&cm_event, 0, sizeof cm_event); |
| cm_id_priv = msg->context[0]; |
| |
| /* Discard old sends or ones without a response. */ |
| spin_lock_irq(&cm_id_priv->lock); |
| state = (enum ib_cm_state) (unsigned long) msg->context[1]; |
| if (msg != cm_id_priv->msg || state != cm_id_priv->id.state) |
| goto discard; |
| |
| switch (state) { |
| case IB_CM_REQ_SENT: |
| case IB_CM_MRA_REQ_RCVD: |
| cm_reset_to_idle(cm_id_priv); |
| cm_event.event = IB_CM_REQ_ERROR; |
| break; |
| case IB_CM_REP_SENT: |
| case IB_CM_MRA_REP_RCVD: |
| cm_reset_to_idle(cm_id_priv); |
| cm_event.event = IB_CM_REP_ERROR; |
| break; |
| case IB_CM_DREQ_SENT: |
| cm_enter_timewait(cm_id_priv); |
| cm_event.event = IB_CM_DREQ_ERROR; |
| break; |
| case IB_CM_SIDR_REQ_SENT: |
| cm_id_priv->id.state = IB_CM_IDLE; |
| cm_event.event = IB_CM_SIDR_REQ_ERROR; |
| break; |
| default: |
| goto discard; |
| } |
| spin_unlock_irq(&cm_id_priv->lock); |
| cm_event.param.send_status = wc_status; |
| |
| /* No other events can occur on the cm_id at this point. */ |
| ret = cm_id_priv->id.cm_handler(&cm_id_priv->id, &cm_event); |
| cm_free_msg(msg); |
| if (ret) |
| ib_destroy_cm_id(&cm_id_priv->id); |
| return; |
| discard: |
| spin_unlock_irq(&cm_id_priv->lock); |
| cm_free_msg(msg); |
| } |
| |
| static void cm_send_handler(struct ib_mad_agent *mad_agent, |
| struct ib_mad_send_wc *mad_send_wc) |
| { |
| struct ib_mad_send_buf *msg = mad_send_wc->send_buf; |
| |
| switch (mad_send_wc->status) { |
| case IB_WC_SUCCESS: |
| case IB_WC_WR_FLUSH_ERR: |
| cm_free_msg(msg); |
| break; |
| default: |
| if (msg->context[0] && msg->context[1]) |
| cm_process_send_error(msg, mad_send_wc->status); |
| else |
| cm_free_msg(msg); |
| break; |
| } |
| } |
| |
| static void cm_work_handler(struct work_struct *_work) |
| { |
| struct cm_work *work = container_of(_work, struct cm_work, work.work); |
| int ret; |
| |
| switch (work->cm_event.event) { |
| case IB_CM_REQ_RECEIVED: |
| ret = cm_req_handler(work); |
| break; |
| case IB_CM_MRA_RECEIVED: |
| ret = cm_mra_handler(work); |
| break; |
| case IB_CM_REJ_RECEIVED: |
| ret = cm_rej_handler(work); |
| break; |
| case IB_CM_REP_RECEIVED: |
| ret = cm_rep_handler(work); |
| break; |
| case IB_CM_RTU_RECEIVED: |
| ret = cm_rtu_handler(work); |
| break; |
| case IB_CM_USER_ESTABLISHED: |
| ret = cm_establish_handler(work); |
| break; |
| case IB_CM_DREQ_RECEIVED: |
| ret = cm_dreq_handler(work); |
| break; |
| case IB_CM_DREP_RECEIVED: |
| ret = cm_drep_handler(work); |
| break; |
| case IB_CM_SIDR_REQ_RECEIVED: |
| ret = cm_sidr_req_handler(work); |
| break; |
| case IB_CM_SIDR_REP_RECEIVED: |
| ret = cm_sidr_rep_handler(work); |
| break; |
| case IB_CM_LAP_RECEIVED: |
| ret = cm_lap_handler(work); |
| break; |
| case IB_CM_APR_RECEIVED: |
| ret = cm_apr_handler(work); |
| break; |
| case IB_CM_TIMEWAIT_EXIT: |
| ret = cm_timewait_handler(work); |
| break; |
| default: |
| ret = -EINVAL; |
| break; |
| } |
| if (ret) |
| cm_free_work(work); |
| } |
| |
| static int cm_establish(struct ib_cm_id *cm_id) |
| { |
| struct cm_id_private *cm_id_priv; |
| struct cm_work *work; |
| unsigned long flags; |
| int ret = 0; |
| |
| work = kmalloc(sizeof *work, GFP_ATOMIC); |
| if (!work) |
| return -ENOMEM; |
| |
| cm_id_priv = container_of(cm_id, struct cm_id_private, id); |
| spin_lock_irqsave(&cm_id_priv->lock, flags); |
| switch (cm_id->state) |
| { |
| case IB_CM_REP_SENT: |
| case IB_CM_MRA_REP_RCVD: |
| cm_id->state = IB_CM_ESTABLISHED; |
| break; |
| case IB_CM_ESTABLISHED: |
| ret = -EISCONN; |
| break; |
| default: |
| ret = -EINVAL; |
| break; |
| } |
| spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| |
| if (ret) { |
| kfree(work); |
| goto out; |
| } |
| |
| /* |
| * The CM worker thread may try to destroy the cm_id before it |
| * can execute this work item. To prevent potential deadlock, |
| * we need to find the cm_id once we're in the context of the |
| * worker thread, rather than holding a reference on it. |
| */ |
| INIT_DELAYED_WORK(&work->work, cm_work_handler); |
| work->local_id = cm_id->local_id; |
| work->remote_id = cm_id->remote_id; |
| work->mad_recv_wc = NULL; |
| work->cm_event.event = IB_CM_USER_ESTABLISHED; |
| queue_delayed_work(cm.wq, &work->work, 0); |
| out: |
| return ret; |
| } |
| |
| static int cm_migrate(struct ib_cm_id *cm_id) |
| { |
| struct cm_id_private *cm_id_priv; |
| unsigned long flags; |
| int ret = 0; |
| |
| cm_id_priv = container_of(cm_id, struct cm_id_private, id); |
| spin_lock_irqsave(&cm_id_priv->lock, flags); |
| if (cm_id->state == IB_CM_ESTABLISHED && |
| (cm_id->lap_state == IB_CM_LAP_UNINIT || |
| cm_id->lap_state == IB_CM_LAP_IDLE)) { |
| cm_id->lap_state = IB_CM_LAP_IDLE; |
| cm_id_priv->av = cm_id_priv->alt_av; |
| } else |
| ret = -EINVAL; |
| spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| |
| return ret; |
| } |
| |
| int ib_cm_notify(struct ib_cm_id *cm_id, enum ib_event_type event) |
| { |
| int ret; |
| |
| switch (event) { |
| case IB_EVENT_COMM_EST: |
| ret = cm_establish(cm_id); |
| break; |
| case IB_EVENT_PATH_MIG: |
| ret = cm_migrate(cm_id); |
| break; |
| default: |
| ret = -EINVAL; |
| } |
| return ret; |
| } |
| EXPORT_SYMBOL(ib_cm_notify); |
| |
| static void cm_recv_handler(struct ib_mad_agent *mad_agent, |
| struct ib_mad_recv_wc *mad_recv_wc) |
| { |
| struct cm_work *work; |
| enum ib_cm_event_type event; |
| int paths = 0; |
| |
| switch (mad_recv_wc->recv_buf.mad->mad_hdr.attr_id) { |
| case CM_REQ_ATTR_ID: |
| paths = 1 + (((struct cm_req_msg *) mad_recv_wc->recv_buf.mad)-> |
| alt_local_lid != 0); |
| event = IB_CM_REQ_RECEIVED; |
| break; |
| case CM_MRA_ATTR_ID: |
| event = IB_CM_MRA_RECEIVED; |
| break; |
| case CM_REJ_ATTR_ID: |
| event = IB_CM_REJ_RECEIVED; |
| break; |
| case CM_REP_ATTR_ID: |
| event = IB_CM_REP_RECEIVED; |
| break; |
| case CM_RTU_ATTR_ID: |
| event = IB_CM_RTU_RECEIVED; |
| break; |
| case CM_DREQ_ATTR_ID: |
| event = IB_CM_DREQ_RECEIVED; |
| break; |
| case CM_DREP_ATTR_ID: |
| event = IB_CM_DREP_RECEIVED; |
| break; |
| case CM_SIDR_REQ_ATTR_ID: |
| event = IB_CM_SIDR_REQ_RECEIVED; |
| break; |
| case CM_SIDR_REP_ATTR_ID: |
| event = IB_CM_SIDR_REP_RECEIVED; |
| break; |
| case CM_LAP_ATTR_ID: |
| paths = 1; |
| event = IB_CM_LAP_RECEIVED; |
| break; |
| case CM_APR_ATTR_ID: |
| event = IB_CM_APR_RECEIVED; |
| break; |
| default: |
| ib_free_recv_mad(mad_recv_wc); |
| return; |
| } |
| |
| work = kmalloc(sizeof *work + sizeof(struct ib_sa_path_rec) * paths, |
| GFP_KERNEL); |
| if (!work) { |
| ib_free_recv_mad(mad_recv_wc); |
| return; |
| } |
| |
| INIT_DELAYED_WORK(&work->work, cm_work_handler); |
| work->cm_event.event = event; |
| work->mad_recv_wc = mad_recv_wc; |
| work->port = (struct cm_port *)mad_agent->context; |
| queue_delayed_work(cm.wq, &work->work, 0); |
| } |
| |
| static int cm_init_qp_init_attr(struct cm_id_private *cm_id_priv, |
| struct ib_qp_attr *qp_attr, |
| int *qp_attr_mask) |
| { |
| unsigned long flags; |
| int ret; |
| |
| spin_lock_irqsave(&cm_id_priv->lock, flags); |
| switch (cm_id_priv->id.state) { |
| case IB_CM_REQ_SENT: |
| case IB_CM_MRA_REQ_RCVD: |
| case IB_CM_REQ_RCVD: |
| case IB_CM_MRA_REQ_SENT: |
| case IB_CM_REP_RCVD: |
| case IB_CM_MRA_REP_SENT: |
| case IB_CM_REP_SENT: |
| case IB_CM_MRA_REP_RCVD: |
| case IB_CM_ESTABLISHED: |
| *qp_attr_mask = IB_QP_STATE | IB_QP_ACCESS_FLAGS | |
| IB_QP_PKEY_INDEX | IB_QP_PORT; |
| qp_attr->qp_access_flags = IB_ACCESS_REMOTE_WRITE; |
| if (cm_id_priv->responder_resources) |
| qp_attr->qp_access_flags |= IB_ACCESS_REMOTE_READ | |
| IB_ACCESS_REMOTE_ATOMIC; |
| qp_attr->pkey_index = cm_id_priv->av.pkey_index; |
| qp_attr->port_num = cm_id_priv->av.port->port_num; |
| ret = 0; |
| break; |
| default: |
| ret = -EINVAL; |
| break; |
| } |
| spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| return ret; |
| } |
| |
| static int cm_init_qp_rtr_attr(struct cm_id_private *cm_id_priv, |
| struct ib_qp_attr *qp_attr, |
| int *qp_attr_mask) |
| { |
| unsigned long flags; |
| int ret; |
| |
| spin_lock_irqsave(&cm_id_priv->lock, flags); |
| switch (cm_id_priv->id.state) { |
| case IB_CM_REQ_RCVD: |
| case IB_CM_MRA_REQ_SENT: |
| case IB_CM_REP_RCVD: |
| case IB_CM_MRA_REP_SENT: |
| case IB_CM_REP_SENT: |
| case IB_CM_MRA_REP_RCVD: |
| case IB_CM_ESTABLISHED: |
| *qp_attr_mask = IB_QP_STATE | IB_QP_AV | IB_QP_PATH_MTU | |
| IB_QP_DEST_QPN | IB_QP_RQ_PSN; |
| qp_attr->ah_attr = cm_id_priv->av.ah_attr; |
| qp_attr->path_mtu = cm_id_priv->path_mtu; |
| qp_attr->dest_qp_num = be32_to_cpu(cm_id_priv->remote_qpn); |
| qp_attr->rq_psn = be32_to_cpu(cm_id_priv->rq_psn); |
| if (cm_id_priv->qp_type == IB_QPT_RC) { |
| *qp_attr_mask |= IB_QP_MAX_DEST_RD_ATOMIC | |
| IB_QP_MIN_RNR_TIMER; |
| qp_attr->max_dest_rd_atomic = |
| cm_id_priv->responder_resources; |
| qp_attr->min_rnr_timer = 0; |
| } |
| if (cm_id_priv->alt_av.ah_attr.dlid) { |
| *qp_attr_mask |= IB_QP_ALT_PATH; |
| qp_attr->alt_port_num = cm_id_priv->alt_av.port->port_num; |
| qp_attr->alt_pkey_index = cm_id_priv->alt_av.pkey_index; |
| qp_attr->alt_timeout = cm_id_priv->alt_av.timeout; |
| qp_attr->alt_ah_attr = cm_id_priv->alt_av.ah_attr; |
| } |
| ret = 0; |
| break; |
| default: |
| ret = -EINVAL; |
| break; |
| } |
| spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| return ret; |
| } |
| |
| static int cm_init_qp_rts_attr(struct cm_id_private *cm_id_priv, |
| struct ib_qp_attr *qp_attr, |
| int *qp_attr_mask) |
| { |
| unsigned long flags; |
| int ret; |
| |
| spin_lock_irqsave(&cm_id_priv->lock, flags); |
| switch (cm_id_priv->id.state) { |
| /* Allow transition to RTS before sending REP */ |
| case IB_CM_REQ_RCVD: |
| case IB_CM_MRA_REQ_SENT: |
| |
| case IB_CM_REP_RCVD: |
| case IB_CM_MRA_REP_SENT: |
| case IB_CM_REP_SENT: |
| case IB_CM_MRA_REP_RCVD: |
| case IB_CM_ESTABLISHED: |
| if (cm_id_priv->id.lap_state == IB_CM_LAP_UNINIT) { |
| *qp_attr_mask = IB_QP_STATE | IB_QP_SQ_PSN; |
| qp_attr->sq_psn = be32_to_cpu(cm_id_priv->sq_psn); |
| if (cm_id_priv->qp_type == IB_QPT_RC) { |
| *qp_attr_mask |= IB_QP_TIMEOUT | IB_QP_RETRY_CNT | |
| IB_QP_RNR_RETRY | |
| IB_QP_MAX_QP_RD_ATOMIC; |
| qp_attr->timeout = cm_id_priv->av.timeout; |
| qp_attr->retry_cnt = cm_id_priv->retry_count; |
| qp_attr->rnr_retry = cm_id_priv->rnr_retry_count; |
| qp_attr->max_rd_atomic = |
| cm_id_priv->initiator_depth; |
| } |
| if (cm_id_priv->alt_av.ah_attr.dlid) { |
| *qp_attr_mask |= IB_QP_PATH_MIG_STATE; |
| qp_attr->path_mig_state = IB_MIG_REARM; |
| } |
| } else { |
| *qp_attr_mask = IB_QP_ALT_PATH | IB_QP_PATH_MIG_STATE; |
| qp_attr->alt_port_num = cm_id_priv->alt_av.port->port_num; |
| qp_attr->alt_pkey_index = cm_id_priv->alt_av.pkey_index; |
| qp_attr->alt_timeout = cm_id_priv->alt_av.timeout; |
| qp_attr->alt_ah_attr = cm_id_priv->alt_av.ah_attr; |
| qp_attr->path_mig_state = IB_MIG_REARM; |
| } |
| ret = 0; |
| break; |
| default: |
| ret = -EINVAL; |
| break; |
| } |
| spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| return ret; |
| } |
| |
| int ib_cm_init_qp_attr(struct ib_cm_id *cm_id, |
| struct ib_qp_attr *qp_attr, |
| int *qp_attr_mask) |
| { |
| struct cm_id_private *cm_id_priv; |
| int ret; |
| |
| cm_id_priv = container_of(cm_id, struct cm_id_private, id); |
| switch (qp_attr->qp_state) { |
| case IB_QPS_INIT: |
| ret = cm_init_qp_init_attr(cm_id_priv, qp_attr, qp_attr_mask); |
| break; |
| case IB_QPS_RTR: |
| ret = cm_init_qp_rtr_attr(cm_id_priv, qp_attr, qp_attr_mask); |
| break; |
| case IB_QPS_RTS: |
| ret = cm_init_qp_rts_attr(cm_id_priv, qp_attr, qp_attr_mask); |
| break; |
| default: |
| ret = -EINVAL; |
| break; |
| } |
| return ret; |
| } |
| EXPORT_SYMBOL(ib_cm_init_qp_attr); |
| |
| static void cm_get_ack_delay(struct cm_device *cm_dev) |
| { |
| struct ib_device_attr attr; |
| |
| if (ib_query_device(cm_dev->device, &attr)) |
| cm_dev->ack_delay = 0; /* acks will rely on packet life time */ |
| else |
| cm_dev->ack_delay = attr.local_ca_ack_delay; |
| } |
| |
| static void cm_add_one(struct ib_device *device) |
| { |
| struct cm_device *cm_dev; |
| struct cm_port *port; |
| struct ib_mad_reg_req reg_req = { |
| .mgmt_class = IB_MGMT_CLASS_CM, |
| .mgmt_class_version = IB_CM_CLASS_VERSION |
| }; |
| struct ib_port_modify port_modify = { |
| .set_port_cap_mask = IB_PORT_CM_SUP |
| }; |
| unsigned long flags; |
| int ret; |
| u8 i; |
| |
| if (rdma_node_get_transport(device->node_type) != RDMA_TRANSPORT_IB) |
| return; |
| |
| cm_dev = kmalloc(sizeof(*cm_dev) + sizeof(*port) * |
| device->phys_port_cnt, GFP_KERNEL); |
| if (!cm_dev) |
| return; |
| |
| cm_dev->device = device; |
| cm_get_ack_delay(cm_dev); |
| |
| set_bit(IB_MGMT_METHOD_SEND, reg_req.method_mask); |
| for (i = 1; i <= device->phys_port_cnt; i++) { |
| port = &cm_dev->port[i-1]; |
| port->cm_dev = cm_dev; |
| port->port_num = i; |
| port->mad_agent = ib_register_mad_agent(device, i, |
| IB_QPT_GSI, |
| ®_req, |
| 0, |
| cm_send_handler, |
| cm_recv_handler, |
| port); |
| if (IS_ERR(port->mad_agent)) |
| goto error1; |
| |
| ret = ib_modify_port(device, i, 0, &port_modify); |
| if (ret) |
| goto error2; |
| } |
| ib_set_client_data(device, &cm_client, cm_dev); |
| |
| write_lock_irqsave(&cm.device_lock, flags); |
| list_add_tail(&cm_dev->list, &cm.device_list); |
| write_unlock_irqrestore(&cm.device_lock, flags); |
| return; |
| |
| error2: |
| ib_unregister_mad_agent(port->mad_agent); |
| error1: |
| port_modify.set_port_cap_mask = 0; |
| port_modify.clr_port_cap_mask = IB_PORT_CM_SUP; |
| while (--i) { |
| port = &cm_dev->port[i-1]; |
| ib_modify_port(device, port->port_num, 0, &port_modify); |
| ib_unregister_mad_agent(port->mad_agent); |
| } |
| kfree(cm_dev); |
| } |
| |
| static void cm_remove_one(struct ib_device *device) |
| { |
| struct cm_device *cm_dev; |
| struct cm_port *port; |
| struct ib_port_modify port_modify = { |
| .clr_port_cap_mask = IB_PORT_CM_SUP |
| }; |
| unsigned long flags; |
| int i; |
| |
| cm_dev = ib_get_client_data(device, &cm_client); |
| if (!cm_dev) |
| return; |
| |
| write_lock_irqsave(&cm.device_lock, flags); |
| list_del(&cm_dev->list); |
| write_unlock_irqrestore(&cm.device_lock, flags); |
| |
| for (i = 1; i <= device->phys_port_cnt; i++) { |
| port = &cm_dev->port[i-1]; |
| ib_modify_port(device, port->port_num, 0, &port_modify); |
| ib_unregister_mad_agent(port->mad_agent); |
| } |
| kfree(cm_dev); |
| } |
| |
| static int __init ib_cm_init(void) |
| { |
| int ret; |
| |
| memset(&cm, 0, sizeof cm); |
| INIT_LIST_HEAD(&cm.device_list); |
| rwlock_init(&cm.device_lock); |
| spin_lock_init(&cm.lock); |
| cm.listen_service_table = RB_ROOT; |
| cm.listen_service_id = __constant_be64_to_cpu(IB_CM_ASSIGN_SERVICE_ID); |
| cm.remote_id_table = RB_ROOT; |
| cm.remote_qp_table = RB_ROOT; |
| cm.remote_sidr_table = RB_ROOT; |
| idr_init(&cm.local_id_table); |
| get_random_bytes(&cm.random_id_operand, sizeof cm.random_id_operand); |
| idr_pre_get(&cm.local_id_table, GFP_KERNEL); |
| INIT_LIST_HEAD(&cm.timewait_list); |
| |
| cm.wq = create_workqueue("ib_cm"); |
| if (!cm.wq) |
| return -ENOMEM; |
| |
| ret = ib_register_client(&cm_client); |
| if (ret) |
| goto error; |
| |
| return 0; |
| error: |
| destroy_workqueue(cm.wq); |
| return ret; |
| } |
| |
| static void __exit ib_cm_cleanup(void) |
| { |
| struct cm_timewait_info *timewait_info, *tmp; |
| |
| spin_lock_irq(&cm.lock); |
| list_for_each_entry(timewait_info, &cm.timewait_list, list) |
| cancel_delayed_work(&timewait_info->work.work); |
| spin_unlock_irq(&cm.lock); |
| |
| destroy_workqueue(cm.wq); |
| |
| list_for_each_entry_safe(timewait_info, tmp, &cm.timewait_list, list) { |
| list_del(&timewait_info->list); |
| kfree(timewait_info); |
| } |
| |
| ib_unregister_client(&cm_client); |
| idr_destroy(&cm.local_id_table); |
| } |
| |
| module_init(ib_cm_init); |
| module_exit(ib_cm_cleanup); |
| |