mirror of https://github.com/ipxe/ipxe.git
644 lines
16 KiB
C
644 lines
16 KiB
C
/*
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* Copyright (C) 2007 Michael Brown <mbrown@fensystems.co.uk>.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of the
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* License, or any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <stdint.h>
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#include <stdio.h>
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#include <string.h>
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#include <byteswap.h>
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#include <errno.h>
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#include <gpxe/if_arp.h>
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#include <gpxe/iobuf.h>
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#include <gpxe/netdevice.h>
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#include <gpxe/infiniband.h>
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#include <gpxe/ipoib.h>
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/** @file
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*
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* IP over Infiniband
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*/
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extern unsigned long hack_ipoib_qkey;
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extern struct ib_address_vector hack_ipoib_bcast_av;
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/** IPoIB MTU */
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#define IPOIB_MTU 2048
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/** Number of IPoIB data send work queue entries */
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#define IPOIB_DATA_NUM_SEND_WQES 4
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/** Number of IPoIB data receive work queue entries */
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#define IPOIB_DATA_NUM_RECV_WQES 4
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/** Number of IPoIB data completion entries */
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#define IPOIB_DATA_NUM_CQES 8
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/** Number of IPoIB metadata send work queue entries */
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#define IPOIB_META_NUM_SEND_WQES 4
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/** Number of IPoIB metadata receive work queue entries */
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#define IPOIB_META_NUM_RECV_WQES 4
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/** Number of IPoIB metadata completion entries */
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#define IPOIB_META_NUM_CQES 8
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/** An IPoIB queue set */
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struct ipoib_queue_set {
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/** Completion queue */
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struct ib_completion_queue *cq;
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/** Queue pair */
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struct ib_queue_pair *qp;
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/** Receive work queue fill level */
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unsigned int recv_fill;
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/** Receive work queue maximum fill level */
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unsigned int recv_max_fill;
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};
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/** An IPoIB device */
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struct ipoib_device {
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/** Network device */
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struct net_device *netdev;
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/** Underlying Infiniband device */
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struct ib_device *ibdev;
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/** Data queue set */
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struct ipoib_queue_set data;
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/** Data queue set */
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struct ipoib_queue_set meta;
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};
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/****************************************************************************
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*
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* IPoIB link layer
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*
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****************************************************************************
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*/
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/** Broadcast QPN used in IPoIB MAC addresses
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*
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* This is a guaranteed invalid real QPN
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*/
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#define IPOIB_BROADCAST_QPN 0xffffffffUL
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/** Broadcast IPoIB address */
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static struct ipoib_mac ipoib_broadcast = {
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.qpn = ntohl ( IPOIB_BROADCAST_QPN ),
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};
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/**
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* Transmit IPoIB packet
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*
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* @v iobuf I/O buffer
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* @v netdev Network device
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* @v net_protocol Network-layer protocol
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* @v ll_dest Link-layer destination address
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*
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* Prepends the IPoIB link-layer header and transmits the packet.
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*/
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static int ipoib_tx ( struct io_buffer *iobuf, struct net_device *netdev,
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struct net_protocol *net_protocol,
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const void *ll_dest ) {
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struct ipoib_hdr *ipoib_hdr =
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iob_push ( iobuf, sizeof ( *ipoib_hdr ) );
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/* Build IPoIB header */
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memcpy ( &ipoib_hdr->pseudo.peer, ll_dest,
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sizeof ( ipoib_hdr->pseudo.peer ) );
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ipoib_hdr->real.proto = net_protocol->net_proto;
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ipoib_hdr->real.reserved = 0;
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/* Hand off to network device */
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return netdev_tx ( netdev, iobuf );
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}
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/**
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* Process received IPoIB packet
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*
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* @v iobuf I/O buffer
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* @v netdev Network device
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*
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* Strips off the IPoIB link-layer header and passes up to the
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* network-layer protocol.
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*/
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static int ipoib_rx ( struct io_buffer *iobuf, struct net_device *netdev ) {
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struct ipoib_hdr *ipoib_hdr = iobuf->data;
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/* Sanity check */
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if ( iob_len ( iobuf ) < sizeof ( *ipoib_hdr ) ) {
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DBG ( "IPoIB packet too short (%d bytes)\n",
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iob_len ( iobuf ) );
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free_iob ( iobuf );
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return -EINVAL;
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}
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/* Strip off IPoIB header */
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iob_pull ( iobuf, sizeof ( *ipoib_hdr ) );
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/* Hand off to network-layer protocol */
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return net_rx ( iobuf, netdev, ipoib_hdr->real.proto,
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&ipoib_hdr->pseudo.peer );
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}
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/**
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* Transcribe IPoIB address
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*
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* @v ll_addr Link-layer address
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* @ret string Link-layer address in human-readable format
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*/
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const char * ipoib_ntoa ( const void *ll_addr ) {
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static char buf[61];
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const uint8_t *ipoib_addr = ll_addr;
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unsigned int i;
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char *p = buf;
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for ( i = 0 ; i < IPOIB_ALEN ; i++ ) {
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p += sprintf ( p, ":%02x", ipoib_addr[i] );
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}
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return ( buf + 1 );
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}
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/** IPoIB protocol */
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struct ll_protocol ipoib_protocol __ll_protocol = {
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.name = "IPoIB",
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.ll_proto = htons ( ARPHRD_INFINIBAND ),
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.ll_addr_len = IPOIB_ALEN,
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.ll_header_len = IPOIB_HLEN,
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.ll_broadcast = ( uint8_t * ) &ipoib_broadcast,
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.tx = ipoib_tx,
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.rx = ipoib_rx,
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.ntoa = ipoib_ntoa,
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};
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/****************************************************************************
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*
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* IPoIB network device
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*
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****************************************************************************
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*/
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/**
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* Destroy queue set
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*
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* @v ipoib IPoIB device
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* @v qset Queue set
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*/
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static void ipoib_destroy_qset ( struct ipoib_device *ipoib,
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struct ipoib_queue_set *qset ) {
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struct ib_device *ibdev = ipoib->ibdev;
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if ( qset->qp )
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ib_destroy_qp ( ibdev, qset->qp );
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if ( qset->cq )
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ib_destroy_cq ( ibdev, qset->cq );
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memset ( qset, 0, sizeof ( *qset ) );
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}
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/**
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* Create queue set
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*
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* @v ipoib IPoIB device
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* @v qset Queue set
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* @ret rc Return status code
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*/
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static int ipoib_create_qset ( struct ipoib_device *ipoib,
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struct ipoib_queue_set *qset,
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unsigned int num_cqes,
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unsigned int num_send_wqes,
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unsigned int num_recv_wqes,
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unsigned long qkey ) {
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struct ib_device *ibdev = ipoib->ibdev;
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int rc;
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/* Store queue parameters */
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qset->recv_max_fill = num_recv_wqes;
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/* Allocate completion queue */
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qset->cq = ib_create_cq ( ibdev, num_cqes );
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if ( ! qset->cq ) {
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DBGC ( ipoib, "IPoIB %p could not allocate completion queue\n",
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ipoib );
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rc = -ENOMEM;
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goto err;
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}
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/* Allocate queue pair */
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qset->qp = ib_create_qp ( ibdev, num_send_wqes, qset->cq,
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num_recv_wqes, qset->cq, qkey );
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if ( ! qset->qp ) {
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DBGC ( ipoib, "IPoIB %p could not allocate queue pair\n",
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ipoib );
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rc = -ENOMEM;
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goto err;
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}
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qset->qp->owner_priv = ipoib->netdev;
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return 0;
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err:
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ipoib_destroy_qset ( ipoib, qset );
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return rc;
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}
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/**
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* Transmit path record request
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*
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* @v ipoib IPoIB device
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* @v gid Destination GID
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* @ret rc Return status code
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*/
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static int ipoib_get_path_record ( struct ipoib_device *ipoib,
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struct ib_gid *gid ) {
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struct ib_device *ibdev = ipoib->ibdev;
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struct io_buffer *iobuf;
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struct ib_mad_path_record *path_record;
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struct ib_address_vector av;
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static uint32_t tid = 0;
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int rc;
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DBG ( "get_path_record():\n" );
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int get_path_record(struct ib_gid *dgid, uint16_t *dlid_p,
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uint8_t *sl_p, uint8_t *rate_p);
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uint16_t tmp_dlid;
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uint8_t tmp_sl;
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uint8_t tmp_rate;
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get_path_record ( gid, &tmp_dlid, &tmp_sl, &tmp_rate );
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DBG ( "ipoib_get_path_record():\n" );
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/* Allocate I/O buffer */
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iobuf = alloc_iob ( sizeof ( *path_record ) );
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if ( ! iobuf )
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return -ENOMEM;
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iob_put ( iobuf, sizeof ( *path_record ) );
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path_record = iobuf->data;
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memset ( path_record, 0, sizeof ( *path_record ) );
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/* Construct path record request */
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path_record->mad_hdr.base_version = IB_MGMT_BASE_VERSION;
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path_record->mad_hdr.mgmt_class = IB_MGMT_CLASS_SUBN_ADM;
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path_record->mad_hdr.class_version = 2;
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path_record->mad_hdr.method = IB_MGMT_METHOD_GET;
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path_record->mad_hdr.attr_id = htons ( IB_SA_ATTR_PATH_REC );
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path_record->mad_hdr.tid = tid++;
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path_record->sa_hdr.comp_mask[1] =
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htonl ( IB_SA_PATH_REC_DGID | IB_SA_PATH_REC_SGID );
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memcpy ( &path_record->dgid, gid, sizeof ( path_record->dgid ) );
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memcpy ( &path_record->sgid, &ibdev->port_gid,
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sizeof ( path_record->sgid ) );
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DBG_HD ( path_record, sizeof ( *path_record ) );
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/* Construct address vector */
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memset ( &av, 0, sizeof ( av ) );
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av.dlid = ibdev->sm_lid;
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av.dest_qp = IB_SA_QPN;
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av.qkey = IB_SA_QKEY;
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/* Post send request */
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if ( ( rc = ib_post_send ( ibdev, ipoib->meta.qp, &av,
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iobuf ) ) != 0 ) {
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DBGC ( ipoib, "IPoIB %p could not send get path record: %s\n",
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ipoib, strerror ( rc ) );
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free_iob ( iobuf );
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return rc;
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}
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return 0;
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}
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/**
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* Transmit packet via IPoIB network device
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*
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* @v netdev Network device
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* @v iobuf I/O buffer
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* @ret rc Return status code
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*/
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static int ipoib_transmit ( struct net_device *netdev,
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struct io_buffer *iobuf ) {
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struct ipoib_device *ipoib = netdev->priv;
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struct ib_device *ibdev = ipoib->ibdev;
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struct ipoib_pseudo_hdr *ipoib_pshdr = iobuf->data;
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int rc;
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if ( iob_len ( iobuf ) < sizeof ( *ipoib_pshdr ) ) {
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DBGC ( ipoib, "IPoIB %p buffer too short\n", ipoib );
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return -EINVAL;
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}
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DBG ( "TX pseudo-header:\n" );
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DBG_HD ( ipoib_pshdr, sizeof ( *ipoib_pshdr ) );
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if ( ipoib_pshdr->peer.qpn != htonl ( IPOIB_BROADCAST_QPN ) ) {
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DBG ( "Get path record\n" );
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rc = ipoib_get_path_record ( ipoib, &ipoib_pshdr->peer.gid );
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free_iob ( iobuf );
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return 0;
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}
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iob_pull ( iobuf, ( sizeof ( *ipoib_pshdr ) ) );
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return ib_post_send ( ibdev, ipoib->data.qp,
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&hack_ipoib_bcast_av, iobuf );
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}
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/**
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* Handle IPoIB data send completion
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*
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* @v ibdev Infiniband device
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* @v qp Queue pair
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* @v completion Completion
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* @v iobuf I/O buffer
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*/
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static void ipoib_data_complete_send ( struct ib_device *ibdev __unused,
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struct ib_queue_pair *qp,
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struct ib_completion *completion,
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struct io_buffer *iobuf ) {
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struct net_device *netdev = qp->owner_priv;
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netdev_tx_complete_err ( netdev, iobuf,
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( completion->syndrome ? -EIO : 0 ) );
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}
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/**
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* Handle IPoIB data receive completion
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*
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* @v ibdev Infiniband device
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* @v qp Queue pair
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* @v completion Completion
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* @v iobuf I/O buffer
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*/
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static void ipoib_data_complete_recv ( struct ib_device *ibdev __unused,
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struct ib_queue_pair *qp,
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struct ib_completion *completion,
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struct io_buffer *iobuf ) {
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struct net_device *netdev = qp->owner_priv;
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struct ipoib_device *ipoib = netdev->priv;
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struct ib_global_route_header *grh = iobuf->data;
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struct ipoib_pseudo_hdr *ipoib_pshdr;
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if ( completion->syndrome ) {
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netdev_rx_err ( netdev, iobuf, -EIO );
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} else {
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iob_put ( iobuf, completion->len );
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iob_pull ( iobuf, ( sizeof ( *grh ) -
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sizeof ( *ipoib_pshdr ) ) );
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/* FIXME: fill in a MAC address for the sake of AoE! */
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netdev_rx ( netdev, iobuf );
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}
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ipoib->data.recv_fill--;
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}
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/**
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* Handle IPoIB metadata send completion
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*
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* @v ibdev Infiniband device
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* @v qp Queue pair
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* @v completion Completion
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* @v iobuf I/O buffer
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*/
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static void ipoib_meta_complete_send ( struct ib_device *ibdev __unused,
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struct ib_queue_pair *qp,
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struct ib_completion *completion,
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struct io_buffer *iobuf ) {
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struct net_device *netdev = qp->owner_priv;
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struct ipoib_device *ipoib = netdev->priv;
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DBG ( "Woohoo! METADATA TX completion\n" );
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if ( completion->syndrome ) {
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DBGC ( ipoib, "IPoIB %p metadata TX completion error %x\n",
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ipoib, completion->syndrome );
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}
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free_iob ( iobuf );
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}
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/**
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* Handle IPoIB metadata receive completion
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*
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* @v ibdev Infiniband device
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* @v qp Queue pair
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* @v completion Completion
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* @v iobuf I/O buffer
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*/
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static void ipoib_meta_complete_recv ( struct ib_device *ibdev __unused,
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struct ib_queue_pair *qp,
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struct ib_completion *completion,
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struct io_buffer *iobuf ) {
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struct net_device *netdev = qp->owner_priv;
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struct ipoib_device *ipoib = netdev->priv;
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DBG ( "***************** META TX!!!!!! ********\n" );
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if ( completion->syndrome ) {
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DBGC ( ipoib, "IPoIB %p metadata RX completion error %x\n",
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ipoib, completion->syndrome );
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} else {
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iob_put ( iobuf, completion->len );
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DBG ( "Metadata RX:\n" );
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DBG_HD ( iobuf->data, iob_len ( iobuf ) );
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}
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ipoib->meta.recv_fill--;
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free_iob ( iobuf );
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}
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/**
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* Refill IPoIB receive ring
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*
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* @v ipoib IPoIB device
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*/
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static void ipoib_refill_recv ( struct ipoib_device *ipoib,
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struct ipoib_queue_set *qset ) {
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struct ib_device *ibdev = ipoib->ibdev;
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struct io_buffer *iobuf;
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int rc;
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while ( qset->recv_fill < qset->recv_max_fill ) {
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iobuf = alloc_iob ( IPOIB_MTU );
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if ( ! iobuf )
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break;
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if ( ( rc = ib_post_recv ( ibdev, qset->qp, iobuf ) ) != 0 ) {
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free_iob ( iobuf );
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break;
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}
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qset->recv_fill++;
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}
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}
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/**
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* Poll IPoIB network device
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*
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* @v netdev Network device
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*/
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static void ipoib_poll ( struct net_device *netdev ) {
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struct ipoib_device *ipoib = netdev->priv;
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struct ib_device *ibdev = ipoib->ibdev;
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ib_poll_cq ( ibdev, ipoib->data.cq, ipoib_data_complete_send,
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ipoib_data_complete_recv );
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ib_poll_cq ( ibdev, ipoib->meta.cq, ipoib_meta_complete_send,
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ipoib_meta_complete_recv );
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ipoib_refill_recv ( ipoib, &ipoib->meta );
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ipoib_refill_recv ( ipoib, &ipoib->data );
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}
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/**
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* Enable/disable interrupts on IPoIB network device
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*
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* @v netdev Network device
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* @v enable Interrupts should be enabled
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*/
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static void ipoib_irq ( struct net_device *netdev __unused,
|
|
int enable __unused ) {
|
|
/* No implementation */
|
|
}
|
|
|
|
/**
|
|
* Open IPoIB network device
|
|
*
|
|
* @v netdev Network device
|
|
* @ret rc Return status code
|
|
*/
|
|
static int ipoib_open ( struct net_device *netdev ) {
|
|
struct ipoib_device *ipoib = netdev->priv;
|
|
struct ib_device *ibdev = ipoib->ibdev;
|
|
int rc;
|
|
|
|
/* Attach to broadcast multicast GID */
|
|
if ( ( rc = ib_mcast_attach ( ibdev, ipoib->data.qp,
|
|
&ibdev->broadcast_gid ) ) != 0 ) {
|
|
DBG ( "Could not attach to broadcast GID: %s\n",
|
|
strerror ( rc ) );
|
|
return rc;
|
|
}
|
|
|
|
/* Fill receive rings */
|
|
ipoib_refill_recv ( ipoib, &ipoib->meta );
|
|
ipoib_refill_recv ( ipoib, &ipoib->data );
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* Close IPoIB network device
|
|
*
|
|
* @v netdev Network device
|
|
*/
|
|
static void ipoib_close ( struct net_device *netdev ) {
|
|
struct ipoib_device *ipoib = netdev->priv;
|
|
struct ib_device *ibdev = ipoib->ibdev;
|
|
|
|
/* Detach from broadcast multicast GID */
|
|
ib_mcast_detach ( ibdev, ipoib->data.qp, &ipoib_broadcast.gid );
|
|
|
|
/* FIXME: should probably flush the receive ring */
|
|
}
|
|
|
|
/** IPoIB network device operations */
|
|
static struct net_device_operations ipoib_operations = {
|
|
.open = ipoib_open,
|
|
.close = ipoib_close,
|
|
.transmit = ipoib_transmit,
|
|
.poll = ipoib_poll,
|
|
.irq = ipoib_irq,
|
|
};
|
|
|
|
/**
|
|
* Probe IPoIB device
|
|
*
|
|
* @v ibdev Infiniband device
|
|
* @ret rc Return status code
|
|
*/
|
|
int ipoib_probe ( struct ib_device *ibdev ) {
|
|
struct net_device *netdev;
|
|
struct ipoib_device *ipoib;
|
|
struct ipoib_mac *mac;
|
|
int rc;
|
|
|
|
/* Allocate network device */
|
|
netdev = alloc_ipoibdev ( sizeof ( *ipoib ) );
|
|
if ( ! netdev )
|
|
return -ENOMEM;
|
|
netdev_init ( netdev, &ipoib_operations );
|
|
ipoib = netdev->priv;
|
|
ib_set_ownerdata ( ibdev, netdev );
|
|
netdev->dev = ibdev->dev;
|
|
memset ( ipoib, 0, sizeof ( *ipoib ) );
|
|
ipoib->netdev = netdev;
|
|
ipoib->ibdev = ibdev;
|
|
|
|
/* Allocate metadata queue set */
|
|
if ( ( rc = ipoib_create_qset ( ipoib, &ipoib->meta,
|
|
IPOIB_META_NUM_CQES,
|
|
IPOIB_META_NUM_SEND_WQES,
|
|
IPOIB_META_NUM_RECV_WQES,
|
|
IB_SA_QKEY ) ) != 0 ) {
|
|
DBGC ( ipoib, "IPoIB %p could not allocate metadata QP: %s\n",
|
|
ipoib, strerror ( rc ) );
|
|
goto err_create_meta_qset;
|
|
}
|
|
|
|
/* Allocate data queue set */
|
|
if ( ( rc = ipoib_create_qset ( ipoib, &ipoib->data,
|
|
IPOIB_DATA_NUM_CQES,
|
|
IPOIB_DATA_NUM_SEND_WQES,
|
|
IPOIB_DATA_NUM_RECV_WQES,
|
|
hack_ipoib_qkey ) ) != 0 ) {
|
|
DBGC ( ipoib, "IPoIB %p could not allocate data QP: %s\n",
|
|
ipoib, strerror ( rc ) );
|
|
goto err_create_data_qset;
|
|
}
|
|
|
|
/* Construct MAC address */
|
|
mac = ( ( struct ipoib_mac * ) netdev->ll_addr );
|
|
mac->qpn = htonl ( ipoib->data.qp->qpn );
|
|
memcpy ( &mac->gid, &ibdev->port_gid, sizeof ( mac->gid ) );
|
|
|
|
/* Register network device */
|
|
if ( ( rc = register_netdev ( netdev ) ) != 0 )
|
|
goto err_register_netdev;
|
|
|
|
return 0;
|
|
|
|
err_register_netdev:
|
|
ipoib_destroy_qset ( ipoib, &ipoib->data );
|
|
err_create_data_qset:
|
|
ipoib_destroy_qset ( ipoib, &ipoib->meta );
|
|
err_create_meta_qset:
|
|
netdev_nullify ( netdev );
|
|
netdev_put ( netdev );
|
|
return rc;
|
|
}
|
|
|
|
/**
|
|
* Remove IPoIB device
|
|
*
|
|
* @v ibdev Infiniband device
|
|
*/
|
|
void ipoib_remove ( struct ib_device *ibdev ) {
|
|
struct net_device *netdev = ib_get_ownerdata ( ibdev );
|
|
|
|
unregister_netdev ( netdev );
|
|
netdev_nullify ( netdev );
|
|
netdev_put ( netdev );
|
|
}
|