mirror of https://gitee.com/openkylin/linux.git
269 lines
8.5 KiB
C
269 lines
8.5 KiB
C
/*
|
|
* Copyright (c) 2005 Voltaire Inc. All rights reserved.
|
|
* Copyright (c) 2005 Intel Corporation. All rights reserved.
|
|
*
|
|
* This Software is licensed under one of the following licenses:
|
|
*
|
|
* 1) under the terms of the "Common Public License 1.0" a copy of which is
|
|
* available from the Open Source Initiative, see
|
|
* http://www.opensource.org/licenses/cpl.php.
|
|
*
|
|
* 2) under the terms of the "The BSD License" a copy of which is
|
|
* available from the Open Source Initiative, see
|
|
* http://www.opensource.org/licenses/bsd-license.php.
|
|
*
|
|
* 3) under the terms of the "GNU General Public License (GPL) Version 2" a
|
|
* copy of which is available from the Open Source Initiative, see
|
|
* http://www.opensource.org/licenses/gpl-license.php.
|
|
*
|
|
* Licensee has the right to choose one of the above licenses.
|
|
*
|
|
* Redistributions of source code must retain the above copyright
|
|
* notice and one of the license notices.
|
|
*
|
|
* Redistributions in binary form must reproduce both the above copyright
|
|
* notice, one of the license notices in the documentation
|
|
* and/or other materials provided with the distribution.
|
|
*
|
|
*/
|
|
|
|
#if !defined(RDMA_CM_H)
|
|
#define RDMA_CM_H
|
|
|
|
#include <linux/socket.h>
|
|
#include <linux/in6.h>
|
|
#include <rdma/ib_addr.h>
|
|
#include <rdma/ib_sa.h>
|
|
|
|
/*
|
|
* Upon receiving a device removal event, users must destroy the associated
|
|
* RDMA identifier and release all resources allocated with the device.
|
|
*/
|
|
enum rdma_cm_event_type {
|
|
RDMA_CM_EVENT_ADDR_RESOLVED,
|
|
RDMA_CM_EVENT_ADDR_ERROR,
|
|
RDMA_CM_EVENT_ROUTE_RESOLVED,
|
|
RDMA_CM_EVENT_ROUTE_ERROR,
|
|
RDMA_CM_EVENT_CONNECT_REQUEST,
|
|
RDMA_CM_EVENT_CONNECT_RESPONSE,
|
|
RDMA_CM_EVENT_CONNECT_ERROR,
|
|
RDMA_CM_EVENT_UNREACHABLE,
|
|
RDMA_CM_EVENT_REJECTED,
|
|
RDMA_CM_EVENT_ESTABLISHED,
|
|
RDMA_CM_EVENT_DISCONNECTED,
|
|
RDMA_CM_EVENT_DEVICE_REMOVAL,
|
|
};
|
|
|
|
enum rdma_port_space {
|
|
RDMA_PS_SDP = 0x0001,
|
|
RDMA_PS_TCP = 0x0106,
|
|
RDMA_PS_UDP = 0x0111,
|
|
RDMA_PS_SCTP = 0x0183
|
|
};
|
|
|
|
struct rdma_addr {
|
|
struct sockaddr src_addr;
|
|
u8 src_pad[sizeof(struct sockaddr_in6) -
|
|
sizeof(struct sockaddr)];
|
|
struct sockaddr dst_addr;
|
|
u8 dst_pad[sizeof(struct sockaddr_in6) -
|
|
sizeof(struct sockaddr)];
|
|
struct rdma_dev_addr dev_addr;
|
|
};
|
|
|
|
struct rdma_route {
|
|
struct rdma_addr addr;
|
|
struct ib_sa_path_rec *path_rec;
|
|
int num_paths;
|
|
};
|
|
|
|
struct rdma_cm_event {
|
|
enum rdma_cm_event_type event;
|
|
int status;
|
|
void *private_data;
|
|
u8 private_data_len;
|
|
};
|
|
|
|
struct rdma_cm_id;
|
|
|
|
/**
|
|
* rdma_cm_event_handler - Callback used to report user events.
|
|
*
|
|
* Notes: Users may not call rdma_destroy_id from this callback to destroy
|
|
* the passed in id, or a corresponding listen id. Returning a
|
|
* non-zero value from the callback will destroy the passed in id.
|
|
*/
|
|
typedef int (*rdma_cm_event_handler)(struct rdma_cm_id *id,
|
|
struct rdma_cm_event *event);
|
|
|
|
struct rdma_cm_id {
|
|
struct ib_device *device;
|
|
void *context;
|
|
struct ib_qp *qp;
|
|
rdma_cm_event_handler event_handler;
|
|
struct rdma_route route;
|
|
enum rdma_port_space ps;
|
|
u8 port_num;
|
|
};
|
|
|
|
/**
|
|
* rdma_create_id - Create an RDMA identifier.
|
|
*
|
|
* @event_handler: User callback invoked to report events associated with the
|
|
* returned rdma_id.
|
|
* @context: User specified context associated with the id.
|
|
* @ps: RDMA port space.
|
|
*/
|
|
struct rdma_cm_id *rdma_create_id(rdma_cm_event_handler event_handler,
|
|
void *context, enum rdma_port_space ps);
|
|
|
|
/**
|
|
* rdma_destroy_id - Destroys an RDMA identifier.
|
|
*
|
|
* @id: RDMA identifier.
|
|
*
|
|
* Note: calling this function has the effect of canceling in-flight
|
|
* asynchronous operations associated with the id.
|
|
*/
|
|
void rdma_destroy_id(struct rdma_cm_id *id);
|
|
|
|
/**
|
|
* rdma_bind_addr - Bind an RDMA identifier to a source address and
|
|
* associated RDMA device, if needed.
|
|
*
|
|
* @id: RDMA identifier.
|
|
* @addr: Local address information. Wildcard values are permitted.
|
|
*
|
|
* This associates a source address with the RDMA identifier before calling
|
|
* rdma_listen. If a specific local address is given, the RDMA identifier will
|
|
* be bound to a local RDMA device.
|
|
*/
|
|
int rdma_bind_addr(struct rdma_cm_id *id, struct sockaddr *addr);
|
|
|
|
/**
|
|
* rdma_resolve_addr - Resolve destination and optional source addresses
|
|
* from IP addresses to an RDMA address. If successful, the specified
|
|
* rdma_cm_id will be bound to a local device.
|
|
*
|
|
* @id: RDMA identifier.
|
|
* @src_addr: Source address information. This parameter may be NULL.
|
|
* @dst_addr: Destination address information.
|
|
* @timeout_ms: Time to wait for resolution to complete.
|
|
*/
|
|
int rdma_resolve_addr(struct rdma_cm_id *id, struct sockaddr *src_addr,
|
|
struct sockaddr *dst_addr, int timeout_ms);
|
|
|
|
/**
|
|
* rdma_resolve_route - Resolve the RDMA address bound to the RDMA identifier
|
|
* into route information needed to establish a connection.
|
|
*
|
|
* This is called on the client side of a connection.
|
|
* Users must have first called rdma_resolve_addr to resolve a dst_addr
|
|
* into an RDMA address before calling this routine.
|
|
*/
|
|
int rdma_resolve_route(struct rdma_cm_id *id, int timeout_ms);
|
|
|
|
/**
|
|
* rdma_create_qp - Allocate a QP and associate it with the specified RDMA
|
|
* identifier.
|
|
*
|
|
* QPs allocated to an rdma_cm_id will automatically be transitioned by the CMA
|
|
* through their states.
|
|
*/
|
|
int rdma_create_qp(struct rdma_cm_id *id, struct ib_pd *pd,
|
|
struct ib_qp_init_attr *qp_init_attr);
|
|
|
|
/**
|
|
* rdma_destroy_qp - Deallocate the QP associated with the specified RDMA
|
|
* identifier.
|
|
*
|
|
* Users must destroy any QP associated with an RDMA identifier before
|
|
* destroying the RDMA ID.
|
|
*/
|
|
void rdma_destroy_qp(struct rdma_cm_id *id);
|
|
|
|
/**
|
|
* rdma_init_qp_attr - Initializes the QP attributes for use in transitioning
|
|
* to a specified QP state.
|
|
* @id: Communication identifier associated with the QP attributes to
|
|
* initialize.
|
|
* @qp_attr: On input, specifies the desired QP state. On output, the
|
|
* mandatory and desired optional attributes will be set in order to
|
|
* modify the QP to the specified state.
|
|
* @qp_attr_mask: The QP attribute mask that may be used to transition the
|
|
* QP to the specified state.
|
|
*
|
|
* Users must set the @qp_attr->qp_state to the desired QP state. This call
|
|
* will set all required attributes for the given transition, along with
|
|
* known optional attributes. Users may override the attributes returned from
|
|
* this call before calling ib_modify_qp.
|
|
*
|
|
* Users that wish to have their QP automatically transitioned through its
|
|
* states can associate a QP with the rdma_cm_id by calling rdma_create_qp().
|
|
*/
|
|
int rdma_init_qp_attr(struct rdma_cm_id *id, struct ib_qp_attr *qp_attr,
|
|
int *qp_attr_mask);
|
|
|
|
struct rdma_conn_param {
|
|
const void *private_data;
|
|
u8 private_data_len;
|
|
u8 responder_resources;
|
|
u8 initiator_depth;
|
|
u8 flow_control;
|
|
u8 retry_count; /* ignored when accepting */
|
|
u8 rnr_retry_count;
|
|
/* Fields below ignored if a QP is created on the rdma_cm_id. */
|
|
u8 srq;
|
|
u32 qp_num;
|
|
enum ib_qp_type qp_type;
|
|
};
|
|
|
|
/**
|
|
* rdma_connect - Initiate an active connection request.
|
|
*
|
|
* Users must have resolved a route for the rdma_cm_id to connect with
|
|
* by having called rdma_resolve_route before calling this routine.
|
|
*/
|
|
int rdma_connect(struct rdma_cm_id *id, struct rdma_conn_param *conn_param);
|
|
|
|
/**
|
|
* rdma_listen - This function is called by the passive side to
|
|
* listen for incoming connection requests.
|
|
*
|
|
* Users must have bound the rdma_cm_id to a local address by calling
|
|
* rdma_bind_addr before calling this routine.
|
|
*/
|
|
int rdma_listen(struct rdma_cm_id *id, int backlog);
|
|
|
|
/**
|
|
* rdma_accept - Called to accept a connection request or response.
|
|
* @id: Connection identifier associated with the request.
|
|
* @conn_param: Information needed to establish the connection. This must be
|
|
* provided if accepting a connection request. If accepting a connection
|
|
* response, this parameter must be NULL.
|
|
*
|
|
* Typically, this routine is only called by the listener to accept a connection
|
|
* request. It must also be called on the active side of a connection if the
|
|
* user is performing their own QP transitions.
|
|
*
|
|
* In the case of error, a reject message is sent to the remote side and the
|
|
* state of the qp associated with the id is modified to error, such that any
|
|
* previously posted receive buffers would be flushed.
|
|
*/
|
|
int rdma_accept(struct rdma_cm_id *id, struct rdma_conn_param *conn_param);
|
|
|
|
/**
|
|
* rdma_reject - Called to reject a connection request or response.
|
|
*/
|
|
int rdma_reject(struct rdma_cm_id *id, const void *private_data,
|
|
u8 private_data_len);
|
|
|
|
/**
|
|
* rdma_disconnect - This function disconnects the associated QP and
|
|
* transitions it into the error state.
|
|
*/
|
|
int rdma_disconnect(struct rdma_cm_id *id);
|
|
|
|
#endif /* RDMA_CM_H */
|
|
|