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- /*
- * Copyright (C) 2007 Michael Brown <mbrown@fensystems.co.uk>.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of the
- * License, or any later version.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- */
-
- #include <stdint.h>
- #include <stdlib.h>
- #include <stdio.h>
- #include <string.h>
- #include <byteswap.h>
- #include <errno.h>
- #include <assert.h>
- #include <gpxe/list.h>
- #include <gpxe/if_arp.h>
- #include <gpxe/netdevice.h>
- #include <gpxe/iobuf.h>
- #include <gpxe/infiniband.h>
-
- /** @file
- *
- * Infiniband protocol
- *
- */
-
- /**
- * Create completion queue
- *
- * @v ibdev Infiniband device
- * @v num_cqes Number of completion queue entries
- * @ret cq New completion queue
- */
- struct ib_completion_queue * ib_create_cq ( struct ib_device *ibdev,
- unsigned int num_cqes ) {
- struct ib_completion_queue *cq;
- int rc;
-
- DBGC ( ibdev, "IBDEV %p creating completion queue\n", ibdev );
-
- /* Allocate and initialise data structure */
- cq = zalloc ( sizeof ( *cq ) );
- if ( ! cq )
- return NULL;
- cq->num_cqes = num_cqes;
- INIT_LIST_HEAD ( &cq->work_queues );
-
- /* Perform device-specific initialisation and get CQN */
- if ( ( rc = ibdev->op->create_cq ( ibdev, cq ) ) != 0 ) {
- DBGC ( ibdev, "IBDEV %p could not initialise completion "
- "queue: %s\n", ibdev, strerror ( rc ) );
- free ( cq );
- return NULL;
- }
-
- DBGC ( ibdev, "IBDEV %p created %d-entry completion queue %p (%p) "
- "with CQN %#lx\n", ibdev, num_cqes, cq, cq->dev_priv, cq->cqn );
- return cq;
- }
-
- /**
- * Destroy completion queue
- *
- * @v ibdev Infiniband device
- * @v cq Completion queue
- */
- void ib_destroy_cq ( struct ib_device *ibdev,
- struct ib_completion_queue *cq ) {
- DBGC ( ibdev, "IBDEV %p destroying completion queue %#lx\n",
- ibdev, cq->cqn );
- assert ( list_empty ( &cq->work_queues ) );
- ibdev->op->destroy_cq ( ibdev, cq );
- free ( cq );
- }
-
- /**
- * Create queue pair
- *
- * @v ibdev Infiniband device
- * @v num_send_wqes Number of send work queue entries
- * @v send_cq Send completion queue
- * @v num_recv_wqes Number of receive work queue entries
- * @v recv_cq Receive completion queue
- * @v qkey Queue key
- * @ret qp Queue pair
- */
- struct ib_queue_pair * ib_create_qp ( struct ib_device *ibdev,
- unsigned int num_send_wqes,
- struct ib_completion_queue *send_cq,
- unsigned int num_recv_wqes,
- struct ib_completion_queue *recv_cq,
- unsigned long qkey ) {
- struct ib_queue_pair *qp;
- size_t total_size;
- int rc;
-
- DBGC ( ibdev, "IBDEV %p creating queue pair\n", ibdev );
-
- /* Allocate and initialise data structure */
- total_size = ( sizeof ( *qp ) +
- ( num_send_wqes * sizeof ( qp->send.iobufs[0] ) ) +
- ( num_recv_wqes * sizeof ( qp->recv.iobufs[0] ) ) );
- qp = zalloc ( total_size );
- if ( ! qp )
- return NULL;
- qp->qkey = qkey;
- qp->send.qp = qp;
- qp->send.is_send = 1;
- qp->send.cq = send_cq;
- list_add ( &qp->send.list, &send_cq->work_queues );
- qp->send.num_wqes = num_send_wqes;
- qp->send.iobufs = ( ( ( void * ) qp ) + sizeof ( *qp ) );
- qp->recv.qp = qp;
- qp->recv.cq = recv_cq;
- list_add ( &qp->recv.list, &recv_cq->work_queues );
- qp->recv.num_wqes = num_recv_wqes;
- qp->recv.iobufs = ( ( ( void * ) qp ) + sizeof ( *qp ) +
- ( num_send_wqes * sizeof ( qp->send.iobufs[0] ) ));
-
- /* Perform device-specific initialisation and get QPN */
- if ( ( rc = ibdev->op->create_qp ( ibdev, qp ) ) != 0 ) {
- DBGC ( ibdev, "IBDEV %p could not initialise queue pair: "
- "%s\n", ibdev, strerror ( rc ) );
- free ( qp );
- return NULL;
- }
-
- DBGC ( ibdev, "IBDEV %p created queue pair %p (%p) with QPN %#lx\n",
- ibdev, qp, qp->dev_priv, qp->qpn );
- DBGC ( ibdev, "IBDEV %p QPN %#lx has %d send entries at [%p,%p)\n",
- ibdev, qp->qpn, num_send_wqes, qp->send.iobufs,
- qp->recv.iobufs );
- DBGC ( ibdev, "IBDEV %p QPN %#lx has %d receive entries at [%p,%p)\n",
- ibdev, qp->qpn, num_send_wqes, qp->recv.iobufs,
- ( ( ( void * ) qp ) + total_size ) );
- return qp;
- }
-
- /**
- * Destroy queue pair
- *
- * @v ibdev Infiniband device
- * @v qp Queue pair
- */
- void ib_destroy_qp ( struct ib_device *ibdev,
- struct ib_queue_pair *qp ) {
- DBGC ( ibdev, "IBDEV %p destroying queue pair %#lx\n",
- ibdev, qp->qpn );
- ibdev->op->destroy_qp ( ibdev, qp );
- list_del ( &qp->send.list );
- list_del ( &qp->recv.list );
- free ( qp );
- }
-
- /**
- * Find work queue belonging to completion queue
- *
- * @v cq Completion queue
- * @v qpn Queue pair number
- * @v is_send Find send work queue (rather than receive)
- * @ret wq Work queue, or NULL if not found
- */
- struct ib_work_queue * ib_find_wq ( struct ib_completion_queue *cq,
- unsigned long qpn, int is_send ) {
- struct ib_work_queue *wq;
-
- list_for_each_entry ( wq, &cq->work_queues, list ) {
- if ( ( wq->qp->qpn == qpn ) && ( wq->is_send == is_send ) )
- return wq;
- }
- return NULL;
- }
-
- /**
- * Allocate Infiniband device
- *
- * @v priv_size Size of private data area
- * @ret ibdev Infiniband device, or NULL
- */
- struct ib_device * alloc_ibdev ( size_t priv_size ) {
- struct ib_device *ibdev;
- size_t total_len;
-
- total_len = ( sizeof ( *ibdev ) + priv_size );
- ibdev = zalloc ( total_len );
- if ( ibdev ) {
- ibdev->dev_priv = ( ( ( void * ) ibdev ) + sizeof ( *ibdev ) );
- }
- return ibdev;
- }
-
- /**
- * Free Infiniband device
- *
- * @v ibdev Infiniband device
- */
- void free_ibdev ( struct ib_device *ibdev ) {
- free ( ibdev );
- }
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