Infiniband communication management. More...

#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include <byteswap.h>
#include <errno.h>
#include <assert.h>
#include <ipxe/infiniband.h>
#include <ipxe/ib_mi.h>
#include <ipxe/ib_pathrec.h>
#include <ipxe/ib_cm.h>

Functions
	FILE_LICENCE (GPL2_OR_LATER_OR_UBDL)

static	LIST_HEAD (ib_cm_conns)
	List of connections. More...

static struct ib_connection *	ib_cm_find (uint32_t local_id)
	Find connection by local communication ID. More...

static int	ib_cm_send_rtu (struct ib_device ibdev, struct ib_mad_interface mi, struct ib_mad_tid tid, struct ib_address_vector av, uint32_t local_id, uint32_t remote_id)
	Send "ready to use" response. More...

static void	ib_cm_recv_rep (struct ib_device ibdev, struct ib_mad_interface mi, union ib_mad mad, struct ib_address_vector av)
	Handle duplicate connection replies. More...

static int	ib_cm_send_drep (struct ib_device ibdev, struct ib_mad_interface mi, struct ib_mad_tid tid, struct ib_address_vector av, uint32_t local_id, uint32_t remote_id)
	Send reply to disconnection request. More...

static void	ib_cm_recv_dreq (struct ib_device ibdev, struct ib_mad_interface mi, union ib_mad mad, struct ib_address_vector av)
	Handle disconnection requests. More...

static int	ib_cm_rejection_reason_to_rc (uint16_t reason)
	Convert connection rejection reason to return status code. More...

static void	ib_cm_req_complete (struct ib_device ibdev, struct ib_mad_interface mi, struct ib_mad_transaction madx, int rc, union ib_mad mad, struct ib_address_vector *av)
	Handle connection request transaction completion. More...

static void	ib_cm_path_complete (struct ib_device ibdev, struct ib_path path, int rc, struct ib_address_vector *av)
	Handle connection path transaction completion. More...

struct ib_connection *	ib_create_conn (struct ib_device ibdev, struct ib_queue_pair qp, union ib_gid dgid, union ib_guid service_id, void private_data, size_t private_data_len, struct ib_connection_operations op)
	Create connection to remote QP. More...

void	ib_destroy_conn (struct ib_device ibdev, struct ib_queue_pair qp __unused, struct ib_connection *conn)
	Destroy connection to remote QP. More...

Variables
struct ib_mad_agent ib_cm_agent []	__ib_mad_agent
	Communication management agents. More...

static struct ib_mad_transaction_operations	ib_cm_req_op
	Connection request operations. More...

static struct ib_path_operations	ib_cm_path_op
	Connection path operations. More...

Detailed Description

Infiniband communication management.

Definition in file ib_cm.c.

Function Documentation

◆ FILE_LICENCE()

FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL )

◆ LIST_HEAD()

static LIST_HEAD ( ib_cm_conns )

static

List of connections.

◆ ib_cm_find()

static struct ib_connection* ib_cm_find ( uint32_t local_id )

static

Find connection by local communication ID.

Parameters

local_id Local communication ID

Return values

conn	Connection, or NULL

Definition at line 53 of file ib_cm.c.

                                                                {
         struct ib_connection *conn;
 
         list_for_each_entry ( conn, &ib_cm_conns, list ) {
                 if ( conn->local_id == local_id )
                         return conn;
         }
         return NULL;
 }

References ib_connection::list, list_for_each_entry, local_id, ib_connection::local_id, and NULL.

Referenced by ib_cm_recv_dreq(), and ib_cm_recv_rep().

◆ ib_cm_send_rtu()

static int ib_cm_send_rtu	(	struct ib_device *	ibdev,
		struct ib_mad_interface *	mi,
		struct ib_mad_tid *	tid,
		struct ib_address_vector *	av,
		uint32_t	local_id,
		uint32_t	remote_id
	)

static

Send "ready to use" response.

Parameters

ibdev	Infiniband device
mi	Management interface
tid	Transaction identifier
av	Address vector
local_id	Local communication ID
remote_id	Remote communication ID

Return values

rc	Return status code

Definition at line 74 of file ib_cm.c.

                                                                     {
         union ib_mad mad;
         struct ib_cm_ready_to_use *rtu = &mad.cm.cm_data.ready_to_use;
         int rc;
 
         /* Construct "ready to use" response */
         memset ( &mad, 0, sizeof ( mad ) );
         mad.hdr.mgmt_class = IB_MGMT_CLASS_CM;
         mad.hdr.class_version = IB_CM_CLASS_VERSION;
         mad.hdr.method = IB_MGMT_METHOD_SEND;
         memcpy ( &mad.hdr.tid, tid, sizeof ( mad.hdr.tid ) );
         mad.hdr.attr_id = htons ( IB_CM_ATTR_READY_TO_USE );
         rtu->local_id = htonl ( local_id );
         rtu->remote_id = htonl ( remote_id );
         if ( ( rc = ib_mi_send ( ibdev, mi, &mad, av ) ) != 0 ) {
                 DBGC ( local_id, "CM %08x could not send RTU: %s\n",
                        local_id, strerror ( rc ) );
                 return rc;
         }
 
         return 0;
 }

References ib_mad_hdr::attr_id, ib_mad_hdr::class_version, ib_mad::cm, ib_mad_cm::cm_data, DBGC, ib_mad::hdr, htonl, htons, IB_CM_ATTR_READY_TO_USE, IB_CM_CLASS_VERSION, IB_MGMT_CLASS_CM, IB_MGMT_METHOD_SEND, ib_mi_send(), local_id, ib_cm_ready_to_use::local_id, mad, memcpy(), memset(), ib_mad_hdr::method, ib_mad_hdr::mgmt_class, rc, ib_cm_data::ready_to_use, remote_id, ib_cm_ready_to_use::remote_id, strerror(), tid, and ib_mad_hdr::tid.

Referenced by ib_cm_recv_rep(), and ib_cm_req_complete().

◆ ib_cm_recv_rep()

static void ib_cm_recv_rep	(	struct ib_device *	ibdev,
		struct ib_mad_interface *	mi,
		union ib_mad *	mad,
		struct ib_address_vector *	av
	)

static

Handle duplicate connection replies.

Parameters

ibdev	Infiniband device
mi	Management interface
mad	Received MAD
av	Source address vector

Return values

rc	Return status code

If a "ready to use" MAD is lost, the peer may resend the connection reply. We have to respond to these with duplicate "ready to use" MADs, otherwise the peer may time out and drop the connection.

Definition at line 114 of file ib_cm.c.

                                                             {
         struct ib_cm_connect_reply *rep = &mad->cm.cm_data.connect_reply;
         struct ib_connection *conn;
         uint32_t local_id = ntohl ( rep->remote_id );
         int rc;
 
         /* Identify connection */
         conn = ib_cm_find ( local_id );
         if ( conn ) {
                 /* Try to send "ready to use" reply */
                 if ( ( rc = ib_cm_send_rtu ( ibdev, mi, &mad->hdr.tid, av,
                                              conn->local_id,
                                              conn->remote_id ) ) != 0 ) {
                         /* Ignore errors; the remote end will retry */
                 }
         } else {
                 DBGC ( local_id, "CM %08x unexpected REP\n", local_id );
         }
 }

References ib_mad::cm, ib_mad_cm::cm_data, ib_cm_data::connect_reply, DBGC, ib_mad::hdr, ib_cm_find(), ib_cm_send_rtu(), ib_connection::ibdev, local_id, ib_connection::local_id, mad, ntohl, rc, ib_connection::remote_id, ib_cm_connect_reply::remote_id, and ib_mad_hdr::tid.

◆ ib_cm_send_drep()

static int ib_cm_send_drep	(	struct ib_device *	ibdev,
		struct ib_mad_interface *	mi,
		struct ib_mad_tid *	tid,
		struct ib_address_vector *	av,
		uint32_t	local_id,
		uint32_t	remote_id
	)

static

Send reply to disconnection request.

Parameters

ibdev	Infiniband device
mi	Management interface
tid	Transaction identifier
av	Address vector
local_id	Local communication ID
remote_id	Remote communication ID

Return values

rc	Return status code

Definition at line 148 of file ib_cm.c.

                                                                      {
         union ib_mad mad;
         struct ib_cm_disconnect_reply *drep = &mad.cm.cm_data.disconnect_reply;
         int rc;
 
         /* Construct reply to disconnection request */
         memset ( &mad, 0, sizeof ( mad ) );
         mad.hdr.mgmt_class = IB_MGMT_CLASS_CM;
         mad.hdr.class_version = IB_CM_CLASS_VERSION;
         mad.hdr.method = IB_MGMT_METHOD_SEND;
         memcpy ( &mad.hdr.tid, tid, sizeof ( mad.hdr.tid ) );
         mad.hdr.attr_id = htons ( IB_CM_ATTR_DISCONNECT_REPLY );
         drep->local_id = htonl ( local_id );
         drep->remote_id = htonl ( remote_id );
         if ( ( rc = ib_mi_send ( ibdev, mi, &mad, av ) ) != 0 ) {
                 DBGC ( local_id, "CM %08x could not send DREP: %s\n",
                        local_id, strerror ( rc ) );
                 return rc;
         }
 
         return 0;
 }

References ib_mad_hdr::attr_id, ib_mad_hdr::class_version, ib_mad::cm, ib_mad_cm::cm_data, DBGC, ib_cm_data::disconnect_reply, ib_mad::hdr, htonl, htons, IB_CM_ATTR_DISCONNECT_REPLY, IB_CM_CLASS_VERSION, IB_MGMT_CLASS_CM, IB_MGMT_METHOD_SEND, ib_mi_send(), local_id, ib_cm_disconnect_reply::local_id, mad, memcpy(), memset(), ib_mad_hdr::method, ib_mad_hdr::mgmt_class, rc, remote_id, ib_cm_disconnect_reply::remote_id, strerror(), tid, and ib_mad_hdr::tid.

Referenced by ib_cm_recv_dreq().

◆ ib_cm_recv_dreq()

static void ib_cm_recv_dreq	(	struct ib_device *	ibdev,
		struct ib_mad_interface *	mi,
		union ib_mad *	mad,
		struct ib_address_vector *	av
	)

static

Handle disconnection requests.

Parameters

ibdev	Infiniband device
mi	Management interface
mad	Received MAD
av	Source address vector

Return values

rc	Return status code

Definition at line 184 of file ib_cm.c.

                                                              {
         struct ib_cm_disconnect_request *dreq =
                 &mad->cm.cm_data.disconnect_request;
         struct ib_connection *conn;
         uint32_t local_id = ntohl ( dreq->remote_id );
         uint32_t remote_id = ntohl ( dreq->local_id );
         int rc;
 
         /* Identify connection */
         conn = ib_cm_find ( local_id );
         if ( conn ) {
                 /* Notify upper layer */
                 conn->op->changed ( ibdev, conn->qp, conn, -ENOTCONN,
                                     &dreq->private_data,
                                     sizeof ( dreq->private_data ) );
         } else {
                 DBGC ( local_id, "CM %08x unexpected DREQ\n", local_id );
         }
 
         /* Send reply */
         if ( ( rc = ib_cm_send_drep ( ibdev, mi, &mad->hdr.tid, av, local_id,
                                       remote_id ) ) != 0 ) {
                 /* Ignore errors; the remote end will retry */
         }
 };

References ib_connection_operations::changed, ib_mad::cm, ib_mad_cm::cm_data, DBGC, ib_cm_data::disconnect_request, ENOTCONN, ib_mad::hdr, ib_cm_find(), ib_cm_send_drep(), ib_connection::ibdev, local_id, ib_cm_disconnect_request::local_id, mad, ntohl, ib_connection::op, ib_cm_disconnect_request::private_data, ib_connection::qp, rc, remote_id, ib_cm_disconnect_request::remote_id, and ib_mad_hdr::tid.

◆ ib_cm_rejection_reason_to_rc()

static int ib_cm_rejection_reason_to_rc ( uint16_t reason )

static

Convert connection rejection reason to return status code.

Parameters

reason Rejection reason (in network byte order)

Return values

rc	Return status code

Definition at line 235 of file ib_cm.c.

                                                             {
         switch ( reason ) {
         case htons ( IB_CM_REJECT_BAD_SERVICE_ID ) :
                 return -ENODEV;
         case htons ( IB_CM_REJECT_STALE_CONN ) :
                 return -EALREADY;
         case htons ( IB_CM_REJECT_CONSUMER ) :
                 return -ENOTTY;
         default:
                 return -EPERM;
         }
 }

References EALREADY, ENODEV, ENOTTY, EPERM, htons, IB_CM_REJECT_BAD_SERVICE_ID, IB_CM_REJECT_CONSUMER, IB_CM_REJECT_STALE_CONN, and reason.

Referenced by ib_cm_req_complete().

◆ ib_cm_req_complete()

static void ib_cm_req_complete	(	struct ib_device *	ibdev,
		struct ib_mad_interface *	mi,
		struct ib_mad_transaction *	madx,
		int	rc,
		union ib_mad *	mad,
		struct ib_address_vector *	av
	)

static

Handle connection request transaction completion.

Parameters

ibdev	Infiniband device
mi	Management interface
madx	Management transaction
rc	Status code
mad	Received MAD (or NULL on error)
av	Source address vector (or NULL on error)

Definition at line 258 of file ib_cm.c.

                                                                 {
         struct ib_connection *conn = ib_madx_get_ownerdata ( madx );
         struct ib_queue_pair *qp = conn->qp;
         struct ib_cm_common *common = &mad->cm.cm_data.common;
         struct ib_cm_connect_reply *rep = &mad->cm.cm_data.connect_reply;
         struct ib_cm_connect_reject *rej = &mad->cm.cm_data.connect_reject;
         uint32_t local_id = conn->local_id;
         void *private_data = NULL;
         size_t private_data_len = 0;
 
         /* Report failures */
         if ( ( rc == 0 ) && ( mad->hdr.status != htons ( IB_MGMT_STATUS_OK ) ))
                 rc = -EIO;
         if ( rc != 0 ) {
                 DBGC ( local_id, "CM %08x connection request failed: %s\n",
                        local_id, strerror ( rc ) );
                 goto out;
         }
 
         /* Record remote communication ID */
         conn->remote_id = ntohl ( common->local_id );
 
         /* Handle response */
         switch ( mad->hdr.attr_id ) {
 
         case htons ( IB_CM_ATTR_CONNECT_REPLY ) :
                 /* Extract fields */
                 qp->av.qpn = ( ntohl ( rep->local_qpn ) >> 8 );
                 qp->send.psn = ( ntohl ( rep->starting_psn ) >> 8 );
                 private_data = &rep->private_data;
                 private_data_len = sizeof ( rep->private_data );
                 DBGC ( local_id, "CM %08x connected to QPN %#lx PSN %#x\n",
                        local_id, qp->av.qpn, qp->send.psn );
 
                 /* Modify queue pair */
                 if ( ( rc = ib_modify_qp ( ibdev, qp ) ) != 0 ) {
                         DBGC ( local_id, "CM %08x could not modify queue "
                                "pair: %s\n", local_id, strerror ( rc ) );
                         goto out;
                 }
 
                 /* Send "ready to use" reply */
                 if ( ( rc = ib_cm_send_rtu ( ibdev, mi, &mad->hdr.tid, av,
                                              conn->local_id,
                                              conn->remote_id ) ) != 0 ) {
                         /* Treat as non-fatal */
                         rc = 0;
                 }
                 break;
 
         case htons ( IB_CM_ATTR_CONNECT_REJECT ) :
                 /* Extract fields */
                 DBGC ( local_id, "CM %08x connection rejected (reason %d)\n",
                        local_id, ntohs ( rej->reason ) );
                 /* Private data is valid only for a Consumer Reject */
                 if ( rej->reason == htons ( IB_CM_REJECT_CONSUMER ) ) {
                         private_data = &rej->private_data;
                         private_data_len = sizeof ( rej->private_data );
                 }
                 rc = ib_cm_rejection_reason_to_rc ( rej->reason );
                 break;
 
         default:
                 DBGC ( local_id, "CM %08x unexpected response (attribute "
                        "%04x)\n", local_id, ntohs ( mad->hdr.attr_id ) );
                 rc = -ENOTSUP;
                 break;
         }
 
  out:
         /* Destroy the completed transaction */
         ib_destroy_madx ( ibdev, ibdev->gsi, madx );
         conn->madx = NULL;
 
         /* Hand off to the upper completion handler */
         conn->op->changed ( ibdev, qp, conn, rc, private_data,
                             private_data_len );
 }

References ib_mad_hdr::attr_id, ib_connection_operations::changed, ib_mad::cm, ib_mad_cm::cm_data, ib_cm_data::common, common, ib_cm_data::connect_reject, ib_cm_data::connect_reply, DBGC, EIO, ENOTSUP, ib_device::gsi, ib_mad::hdr, htons, IB_CM_ATTR_CONNECT_REJECT, IB_CM_ATTR_CONNECT_REPLY, IB_CM_REJECT_CONSUMER, ib_cm_rejection_reason_to_rc(), ib_cm_send_rtu(), ib_destroy_madx(), ib_madx_get_ownerdata(), IB_MGMT_STATUS_OK, ib_modify_qp(), local_id, ib_connection::local_id, ib_cm_common::local_id, ib_cm_connect_reply::local_qpn, mad, ib_connection::madx, ntohl, ntohs, NULL, ib_connection::op, out, private_data, ib_cm_connect_reject::private_data, ib_cm_connect_reply::private_data, qp, ib_connection::qp, rc, ib_cm_connect_reject::reason, ib_connection::remote_id, ib_cm_connect_reply::starting_psn, ib_mad_hdr::status, strerror(), and ib_mad_hdr::tid.

◆ ib_cm_path_complete()

static void ib_cm_path_complete	(	struct ib_device *	ibdev,
		struct ib_path *	path,
		int	rc,
		struct ib_address_vector *	av
	)

static

Handle connection path transaction completion.

Parameters

ibdev	Infiniband device
path	Path
rc	Status code
av	Address vector, or NULL on error

Definition at line 354 of file ib_cm.c.

                                                                  {
         struct ib_connection *conn = ib_path_get_ownerdata ( path );
         struct ib_queue_pair *qp = conn->qp;
         union ib_mad mad;
         struct ib_cm_connect_request *req = &mad.cm.cm_data.connect_request;
         uint32_t local_id = conn->local_id;
         size_t private_data_len;
 
         /* Report failures */
         if ( rc != 0 ) {
                 DBGC ( local_id, "CM %08x path lookup failed: %s\n",
                        local_id, strerror ( rc ) );
                 conn->op->changed ( ibdev, qp, conn, rc, NULL, 0 );
                 goto out;
         }
 
         /* Update queue pair peer path */
         memcpy ( &qp->av, av, sizeof ( qp->av ) );
 
         /* Construct connection request */
         memset ( &mad, 0, sizeof ( mad ) );
         mad.hdr.mgmt_class = IB_MGMT_CLASS_CM;
         mad.hdr.class_version = IB_CM_CLASS_VERSION;
         mad.hdr.method = IB_MGMT_METHOD_SEND;
         mad.hdr.attr_id = htons ( IB_CM_ATTR_CONNECT_REQUEST );
         req->local_id = htonl ( conn->local_id );
         memcpy ( &req->service_id, &conn->service_id,
                  sizeof ( req->service_id ) );
         memcpy ( &req->local_ca, &ibdev->node_guid, sizeof ( req->local_ca ) );
         req->local_qpn__responder_resources = htonl ( ( qp->qpn << 8 ) | 1 );
         req->local_eecn__initiator_depth = htonl ( ( 0 << 8 ) | 1 );
         req->remote_eecn__remote_timeout__service_type__ee_flow_ctrl =
                 htonl ( ( 0x14 << 3 ) | ( IB_CM_TRANSPORT_RC << 1 ) |
                         ( 0 << 0 ) );
         req->starting_psn__local_timeout__retry_count =
                 htonl ( ( qp->recv.psn << 8 ) | ( 0x14 << 3 ) |
                         ( 0x07 << 0 ) );
         req->pkey = htons ( ibdev->pkey );
         req->payload_mtu__rdc_exists__rnr_retry =
                 ( ( IB_MTU_2048 << 4 ) | ( 1 << 3 ) | ( 0x07 << 0 ) );
         req->max_cm_retries__srq = ( ( 0x0f << 4 ) | ( 0 << 3 ) );
         req->primary.local_lid = htons ( ibdev->lid );
         req->primary.remote_lid = htons ( conn->qp->av.lid );
         memcpy ( &req->primary.local_gid, &ibdev->gid,
                  sizeof ( req->primary.local_gid ) );
         memcpy ( &req->primary.remote_gid, &conn->qp->av.gid,
                  sizeof ( req->primary.remote_gid ) );
         req->primary.flow_label__rate =
                 htonl ( ( 0 << 12 ) | ( conn->qp->av.rate << 0 ) );
         req->primary.hop_limit = 0;
         req->primary.sl__subnet_local =
                 ( ( conn->qp->av.sl << 4 ) | ( 1 << 3 ) );
         req->primary.local_ack_timeout = ( 0x13 << 3 );
         private_data_len = conn->private_data_len;
         if ( private_data_len > sizeof ( req->private_data ) )
                 private_data_len = sizeof ( req->private_data );
         memcpy ( &req->private_data, &conn->private_data, private_data_len );
 
         /* Create connection request */
         av->qpn = IB_QPN_GSI;
         av->qkey = IB_QKEY_GSI;
         conn->madx = ib_create_madx ( ibdev, ibdev->gsi, &mad, av,
                                       &ib_cm_req_op );
         if ( ! conn->madx ) {
                 DBGC ( local_id, "CM %08x could not create connection "
                        "request\n", local_id );
                 conn->op->changed ( ibdev, qp, conn, rc, NULL, 0 );
                 goto out;
         }
         ib_madx_set_ownerdata ( conn->madx, conn );
 
  out:
         /* Destroy the completed transaction */
         ib_destroy_path ( ibdev, path );
         conn->path = NULL;
 }

◆ ib_create_conn()

struct ib_connection* ib_create_conn	(	struct ib_device *	ibdev,
		struct ib_queue_pair *	qp,
		union ib_gid *	dgid,
		union ib_guid *	service_id,
		void *	private_data,
		size_t	private_data_len,
		struct ib_connection_operations *	op
	)

Create connection to remote QP.

Parameters

ibdev	Infiniband device
qp	Queue pair
dgid	Target GID
service_id	Target service ID
private_data	Connection request private data
private_data_len	Length of connection request private data
op	Connection operations

Return values

conn	Connection

Definition at line 451 of file ib_cm.c.

                                                        {
         struct ib_connection *conn;
         uint32_t local_id;
 
         /* Allocate and initialise request */
         conn = zalloc ( sizeof ( *conn ) + private_data_len );
         if ( ! conn )
                 goto err_alloc_conn;
         conn->ibdev = ibdev;
         conn->qp = qp;
         memset ( &qp->av, 0, sizeof ( qp->av ) );
         qp->av.gid_present = 1;
         memcpy ( &qp->av.gid, dgid, sizeof ( qp->av.gid ) );
         conn->local_id = local_id = random();
         memcpy ( &conn->service_id, service_id, sizeof ( conn->service_id ) );
         conn->op = op;
         conn->private_data_len = private_data_len;
         memcpy ( &conn->private_data, private_data, private_data_len );
 
         /* Create path */
         conn->path = ib_create_path ( ibdev, &qp->av, &ib_cm_path_op );
         if ( ! conn->path )
                 goto err_create_path;
         ib_path_set_ownerdata ( conn->path, conn );
 
         /* Add to list of connections */
         list_add ( &conn->list, &ib_cm_conns );
 
         DBGC ( local_id, "CM %08x created for IBDEV %s QPN %#lx\n",
                local_id, ibdev->name, qp->qpn );
         DBGC ( local_id, "CM %08x connecting to " IB_GID_FMT " "
                IB_GUID_FMT "\n", local_id, IB_GID_ARGS ( dgid ),
                IB_GUID_ARGS ( service_id ) );
 
         return conn;
 
         ib_destroy_path ( ibdev, conn->path );
  err_create_path:
         free ( conn );
  err_alloc_conn:
         return NULL;
 }

References DBGC, dgid, free, ib_cm_path_op, ib_create_path(), ib_destroy_path(), IB_GID_ARGS, IB_GID_FMT, IB_GUID_ARGS, IB_GUID_FMT, ib_path_set_ownerdata(), ib_connection::ibdev, ib_connection::list, list_add, local_id, ib_connection::local_id, memcpy(), memset(), ib_device::name, NULL, ib_connection::op, op, ib_connection::path, private_data, ib_connection::private_data, ib_connection::private_data_len, qp, ib_connection::qp, random(), service_id, ib_connection::service_id, and zalloc().

Referenced by ib_cmrc_xfer_deliver().

◆ ib_destroy_conn()

void ib_destroy_conn	(	struct ib_device *	ibdev,
		struct ib_queue_pair *qp	__unused,
		struct ib_connection *	conn
	)

Destroy connection to remote QP.

Parameters

ibdev	Infiniband device
qp	Queue pair
conn	Connection

Definition at line 504 of file ib_cm.c.

                                                     {
 
         list_del ( &conn->list );
         if ( conn->madx )
                 ib_destroy_madx ( ibdev, ibdev->gsi, conn->madx );
         if ( conn->path )
                 ib_destroy_path ( ibdev, conn->path );
         free ( conn );
 }

References free, ib_device::gsi, ib_destroy_madx(), ib_destroy_path(), ib_connection::ibdev, ib_connection::list, list_del, ib_connection::madx, and ib_connection::path.

Referenced by ib_cmrc_shutdown().

Variable Documentation

◆ __ib_mad_agent

struct ib_mad_agent ib_cm_agent [] __ib_mad_agent

Initial value:

= {
        {
                .mgmt_class = IB_MGMT_CLASS_CM,
                .class_version = IB_CM_CLASS_VERSION,
                .attr_id = htons ( IB_CM_ATTR_CONNECT_REPLY ),
                .handle = ib_cm_recv_rep,
        },
        {
                .mgmt_class = IB_MGMT_CLASS_CM,
                .class_version = IB_CM_CLASS_VERSION,
                .attr_id = htons ( IB_CM_ATTR_DISCONNECT_REQUEST ),
                .handle = ib_cm_recv_dreq,
        },
}

Communication management agents.

Definition at line 214 of file ib_cm.c.

◆ ib_cm_req_op

struct ib_mad_transaction_operations ib_cm_req_op

static

Initial value:

= {
        .complete = ib_cm_req_complete,
}

Connection request operations.

Definition at line 342 of file ib_cm.c.

Referenced by ib_cm_path_complete().

◆ ib_cm_path_op

struct ib_path_operations ib_cm_path_op

static

Initial value:

= {
        .complete = ib_cm_path_complete,
}

Connection path operations.

Definition at line 434 of file ib_cm.c.

Referenced by ib_create_conn().

Functions

Variables

Detailed Description

Function Documentation

◆ FILE_LICENCE()

◆ LIST_HEAD()

◆ ib_cm_find()

◆ ib_cm_send_rtu()

◆ ib_cm_recv_rep()

◆ ib_cm_send_drep()

◆ ib_cm_recv_dreq()

◆ ib_cm_rejection_reason_to_rc()

◆ ib_cm_req_complete()

◆ ib_cm_path_complete()

◆ ib_create_conn()

◆ ib_destroy_conn()

Variable Documentation

◆ __ib_mad_agent

◆ ib_cm_req_op

◆ ib_cm_path_op