RDMA: iWARP Connection Manager.
Add an iWARP Connection Manager (CM), which abstracts connection management for iWARP devices (RNICs). It is a logical instance of the xx_cm where xx is the transport type (ib or iw). The symbols exported are used by the transport independent rdma_cm module, and are available also for transport dependent ULPs. Signed-off-by: Tom Tucker <tom@opengridcomputing.com> Signed-off-by: Steve Wise <swise@opengridcomputing.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
This commit is contained in:
Tom Tucker
Roland Dreier
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/*
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* Copyright (c) 2005 Network Appliance, Inc. All rights reserved.
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* Copyright (c) 2005 Open Grid Computing, Inc. All rights reserved.
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*
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* This software is available to you under a choice of one of two
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* licenses. You may choose to be licensed under the terms of the GNU
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* General Public License (GPL) Version 2, available from the file
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* COPYING in the main directory of this source tree, or the
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* OpenIB.org BSD license below:
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*
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* Redistribution and use in source and binary forms, with or
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* without modification, are permitted provided that the following
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* conditions are met:
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*
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* - Redistributions of source code must retain the above
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* copyright notice, this list of conditions and the following
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* disclaimer.
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*
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* - Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials
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* provided with the distribution.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#ifndef IWCM_H
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#define IWCM_H
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enum iw_cm_state {
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IW_CM_STATE_IDLE, /* unbound, inactive */
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IW_CM_STATE_LISTEN, /* listen waiting for connect */
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IW_CM_STATE_CONN_RECV, /* inbound waiting for user accept */
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IW_CM_STATE_CONN_SENT, /* outbound waiting for peer accept */
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IW_CM_STATE_ESTABLISHED, /* established */
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IW_CM_STATE_CLOSING, /* disconnect */
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IW_CM_STATE_DESTROYING /* object being deleted */
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};
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struct iwcm_id_private {
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struct iw_cm_id id;
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enum iw_cm_state state;
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unsigned long flags;
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struct ib_qp *qp;
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struct completion destroy_comp;
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wait_queue_head_t connect_wait;
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struct list_head work_list;
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spinlock_t lock;
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atomic_t refcount;
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struct list_head work_free_list;
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};
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#define IWCM_F_CALLBACK_DESTROY 1
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#define IWCM_F_CONNECT_WAIT 2
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#endif /* IWCM_H */
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/*
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* Copyright (c) 2005 Network Appliance, Inc. All rights reserved.
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* Copyright (c) 2005 Open Grid Computing, Inc. All rights reserved.
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*
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* This software is available to you under a choice of one of two
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* licenses. You may choose to be licensed under the terms of the GNU
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* General Public License (GPL) Version 2, available from the file
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* COPYING in the main directory of this source tree, or the
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* OpenIB.org BSD license below:
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*
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* Redistribution and use in source and binary forms, with or
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* without modification, are permitted provided that the following
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* conditions are met:
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*
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* - Redistributions of source code must retain the above
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* copyright notice, this list of conditions and the following
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* disclaimer.
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*
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* - Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials
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* provided with the distribution.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#ifndef IW_CM_H
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#define IW_CM_H
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#include <linux/in.h>
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#include <rdma/ib_cm.h>
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struct iw_cm_id;
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enum iw_cm_event_type {
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IW_CM_EVENT_CONNECT_REQUEST = 1, /* connect request received */
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IW_CM_EVENT_CONNECT_REPLY, /* reply from active connect request */
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IW_CM_EVENT_ESTABLISHED, /* passive side accept successful */
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IW_CM_EVENT_DISCONNECT, /* orderly shutdown */
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IW_CM_EVENT_CLOSE /* close complete */
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};
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enum iw_cm_event_status {
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IW_CM_EVENT_STATUS_OK = 0, /* request successful */
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IW_CM_EVENT_STATUS_ACCEPTED = 0, /* connect request accepted */
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IW_CM_EVENT_STATUS_REJECTED, /* connect request rejected */
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IW_CM_EVENT_STATUS_TIMEOUT, /* the operation timed out */
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IW_CM_EVENT_STATUS_RESET, /* reset from remote peer */
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IW_CM_EVENT_STATUS_EINVAL, /* asynchronous failure for bad parm */
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};
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struct iw_cm_event {
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enum iw_cm_event_type event;
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enum iw_cm_event_status status;
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struct sockaddr_in local_addr;
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struct sockaddr_in remote_addr;
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void *private_data;
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u8 private_data_len;
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void* provider_data;
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};
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/**
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* iw_cm_handler - Function to be called by the IW CM when delivering events
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* to the client.
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*
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* @cm_id: The IW CM identifier associated with the event.
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* @event: Pointer to the event structure.
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*/
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typedef int (*iw_cm_handler)(struct iw_cm_id *cm_id,
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struct iw_cm_event *event);
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/**
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* iw_event_handler - Function called by the provider when delivering provider
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* events to the IW CM. Returns either 0 indicating the event was processed
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* or -errno if the event could not be processed.
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*
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* @cm_id: The IW CM identifier associated with the event.
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* @event: Pointer to the event structure.
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*/
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typedef int (*iw_event_handler)(struct iw_cm_id *cm_id,
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struct iw_cm_event *event);
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struct iw_cm_id {
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iw_cm_handler cm_handler; /* client callback function */
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void *context; /* client cb context */
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struct ib_device *device;
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struct sockaddr_in local_addr;
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struct sockaddr_in remote_addr;
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void *provider_data; /* provider private data */
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iw_event_handler event_handler; /* cb for provider
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events */
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/* Used by provider to add and remove refs on IW cm_id */
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void (*add_ref)(struct iw_cm_id *);
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void (*rem_ref)(struct iw_cm_id *);
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};
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struct iw_cm_conn_param {
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const void *private_data;
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u16 private_data_len;
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u32 ord;
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u32 ird;
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u32 qpn;
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};
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struct iw_cm_verbs {
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void (*add_ref)(struct ib_qp *qp);
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void (*rem_ref)(struct ib_qp *qp);
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struct ib_qp * (*get_qp)(struct ib_device *device,
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int qpn);
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int (*connect)(struct iw_cm_id *cm_id,
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struct iw_cm_conn_param *conn_param);
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int (*accept)(struct iw_cm_id *cm_id,
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struct iw_cm_conn_param *conn_param);
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int (*reject)(struct iw_cm_id *cm_id,
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const void *pdata, u8 pdata_len);
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int (*create_listen)(struct iw_cm_id *cm_id,
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int backlog);
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int (*destroy_listen)(struct iw_cm_id *cm_id);
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};
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/**
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* iw_create_cm_id - Create an IW CM identifier.
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*
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* @device: The IB device on which to create the IW CM identier.
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* @event_handler: User callback invoked to report events associated with the
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* returned IW CM identifier.
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* @context: User specified context associated with the id.
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*/
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struct iw_cm_id *iw_create_cm_id(struct ib_device *device,
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iw_cm_handler cm_handler, void *context);
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/**
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* iw_destroy_cm_id - Destroy an IW CM identifier.
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*
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* @cm_id: The previously created IW CM identifier to destroy.
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*
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* The client can assume that no events will be delivered for the CM ID after
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* this function returns.
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*/
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void iw_destroy_cm_id(struct iw_cm_id *cm_id);
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/**
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* iw_cm_bind_qp - Unbind the specified IW CM identifier and QP
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*
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* @cm_id: The IW CM idenfier to unbind from the QP.
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* @qp: The QP
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*
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* This is called by the provider when destroying the QP to ensure
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* that any references held by the IWCM are released. It may also
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* be called by the IWCM when destroying a CM_ID to that any
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* references held by the provider are released.
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*/
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void iw_cm_unbind_qp(struct iw_cm_id *cm_id, struct ib_qp *qp);
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/**
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* iw_cm_get_qp - Return the ib_qp associated with a QPN
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*
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* @ib_device: The IB device
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* @qpn: The queue pair number
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*/
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struct ib_qp *iw_cm_get_qp(struct ib_device *device, int qpn);
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/**
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* iw_cm_listen - Listen for incoming connection requests on the
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* specified IW CM id.
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*
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* @cm_id: The IW CM identifier.
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* @backlog: The maximum number of outstanding un-accepted inbound listen
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* requests to queue.
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*
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* The source address and port number are specified in the IW CM identifier
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* structure.
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*/
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int iw_cm_listen(struct iw_cm_id *cm_id, int backlog);
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/**
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* iw_cm_accept - Called to accept an incoming connect request.
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*
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* @cm_id: The IW CM identifier associated with the connection request.
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* @iw_param: Pointer to a structure containing connection establishment
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* parameters.
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*
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* The specified cm_id will have been provided in the event data for a
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* CONNECT_REQUEST event. Subsequent events related to this connection will be
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* delivered to the specified IW CM identifier prior and may occur prior to
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* the return of this function. If this function returns a non-zero value, the
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* client can assume that no events will be delivered to the specified IW CM
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* identifier.
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*/
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int iw_cm_accept(struct iw_cm_id *cm_id, struct iw_cm_conn_param *iw_param);
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/**
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* iw_cm_reject - Reject an incoming connection request.
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*
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* @cm_id: Connection identifier associated with the request.
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* @private_daa: Pointer to data to deliver to the remote peer as part of the
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* reject message.
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* @private_data_len: The number of bytes in the private_data parameter.
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*
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* The client can assume that no events will be delivered to the specified IW
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* CM identifier following the return of this function. The private_data
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* buffer is available for reuse when this function returns.
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*/
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int iw_cm_reject(struct iw_cm_id *cm_id, const void *private_data,
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u8 private_data_len);
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/**
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* iw_cm_connect - Called to request a connection to a remote peer.
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*
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* @cm_id: The IW CM identifier for the connection.
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* @iw_param: Pointer to a structure containing connection establishment
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* parameters.
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*
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* Events may be delivered to the specified IW CM identifier prior to the
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* return of this function. If this function returns a non-zero value, the
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* client can assume that no events will be delivered to the specified IW CM
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* identifier.
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*/
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int iw_cm_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *iw_param);
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/**
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* iw_cm_disconnect - Close the specified connection.
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*
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* @cm_id: The IW CM identifier to close.
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* @abrupt: If 0, the connection will be closed gracefully, otherwise, the
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* connection will be reset.
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*
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* The IW CM identifier is still active until the IW_CM_EVENT_CLOSE event is
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* delivered.
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*/
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int iw_cm_disconnect(struct iw_cm_id *cm_id, int abrupt);
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/**
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* iw_cm_init_qp_attr - Called to initialize the attributes of the QP
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* associated with a IW CM identifier.
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*
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* @cm_id: The IW CM identifier associated with the QP
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* @qp_attr: Pointer to the QP attributes structure.
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* @qp_attr_mask: Pointer to a bit vector specifying which QP attributes are
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* valid.
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*/
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int iw_cm_init_qp_attr(struct iw_cm_id *cm_id, struct ib_qp_attr *qp_attr,
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int *qp_attr_mask);
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#endif /* IW_CM_H */
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