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[infiniband] Provide a general mechanism for path record lookups

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Generalise out the path record lookup code from IPoIB.
This commit is contained in:
Michael Brown
2009-07-07 02:01:21 +01:00
parent 1d8c85d112
commit d6b47871de
4 changed files with 247 additions and 108 deletions
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116
src/drivers/net/ipoib.c
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@@ -29,6 +29,7 @@ FILE_LICENCE ( GPL2_OR_LATER );
#include <gpxe/netdevice.h>
#include <gpxe/infiniband.h>
#include <gpxe/ib_qset.h>
#include <gpxe/ib_pathrec.h>
#include <gpxe/ipoib.h>
/** @file
@@ -78,9 +79,6 @@ struct ipoib_device {
int broadcast_attached;
};
/** TID half used to identify get path record replies */
#define IPOIB_TID_GET_PATH_REC 0x11111111UL
/** TID half used to identify multicast member record replies */
#define IPOIB_TID_MC_MEMBER_REC 0x22222222UL
@@ -118,12 +116,6 @@ struct ipoib_peer {
uint8_t key;
/** MAC address */
struct ipoib_mac mac;
/** LID */
unsigned int lid;
/** Service level */
unsigned int sl;
/** Rate */
unsigned int rate;
};
/** Number of IPoIB peer cache entries
@@ -352,63 +344,6 @@ struct ll_protocol ipoib_protocol __ll_protocol = {
****************************************************************************
*/
/**
* Transmit path record request
*
* @v ipoib IPoIB device
* @v gid Destination GID
* @ret rc Return status code
*/
static int ipoib_get_path_record ( struct ipoib_device *ipoib,
struct ib_gid *gid ) {
struct ib_device *ibdev = ipoib->ibdev;
struct io_buffer *iobuf;
struct ib_mad_sa *sa;
struct ib_address_vector av;
int rc;
/* Allocate I/O buffer */
iobuf = alloc_iob ( sizeof ( *sa ) );
if ( ! iobuf )
return -ENOMEM;
iob_put ( iobuf, sizeof ( *sa ) );
sa = iobuf->data;
memset ( sa, 0, sizeof ( *sa ) );
/* Construct path record request */
sa->mad_hdr.base_version = IB_MGMT_BASE_VERSION;
sa->mad_hdr.mgmt_class = IB_MGMT_CLASS_SUBN_ADM;
sa->mad_hdr.class_version = 2;
sa->mad_hdr.method = IB_MGMT_METHOD_GET;
sa->mad_hdr.attr_id = htons ( IB_SA_ATTR_PATH_REC );
sa->mad_hdr.tid[0] = IPOIB_TID_GET_PATH_REC;
sa->mad_hdr.tid[1] = ipoib_meta_tid++;
sa->sa_hdr.comp_mask[1] =
htonl ( IB_SA_PATH_REC_DGID | IB_SA_PATH_REC_SGID );
memcpy ( &sa->sa_data.path_record.dgid, gid,
sizeof ( sa->sa_data.path_record.dgid ) );
memcpy ( &sa->sa_data.path_record.sgid, &ibdev->gid,
sizeof ( sa->sa_data.path_record.sgid ) );
/* Construct address vector */
memset ( &av, 0, sizeof ( av ) );
av.lid = ibdev->sm_lid;
av.sl = ibdev->sm_sl;
av.qpn = IB_QPN_GMA;
av.qkey = IB_QKEY_GMA;
/* Post send request */
if ( ( rc = ib_post_send ( ibdev, ipoib->meta.qp, &av,
iobuf ) ) != 0 ) {
DBGC ( ipoib, "IPoIB %p could not send get path record: %s\n",
ipoib, strerror ( rc ) );
free_iob ( iobuf );
return rc;
}
return 0;
}
/**
* Transmit multicast group membership request
*
@@ -484,7 +419,7 @@ static int ipoib_transmit ( struct net_device *netdev,
struct ipoib_hdr *ipoib_hdr;
struct ipoib_peer *dest;
struct ib_address_vector av;
struct ib_gid *gid;
int rc;
/* Sanity check */
if ( iob_len ( iobuf ) < sizeof ( *ipoib_hdr ) ) {
@@ -513,21 +448,16 @@ static int ipoib_transmit ( struct net_device *netdev,
/* Broadcast */
av.qpn = IB_QPN_BROADCAST;
av.lid = ipoib->broadcast_lid;
gid = &ipoib->broadcast_gid;
memcpy ( &av.gid, &ipoib->broadcast_gid, sizeof ( av.gid ) );
} else {
/* Unicast */
if ( ! dest->lid ) {
/* No LID yet - get path record to fetch LID */
ipoib_get_path_record ( ipoib, &dest->mac.gid );
return -ENOENT;
}
av.qpn = ntohl ( dest->mac.qpn );
av.lid = dest->lid;
av.rate = dest->rate;
av.sl = dest->sl;
gid = &dest->mac.gid;
memcpy ( &av.gid, &dest->mac.gid, sizeof ( av.gid ) );
if ( ( rc = ib_resolve_path ( ibdev, &av ) ) != 0 ) {
/* Path not resolved yet */
return rc;
}
}
memcpy ( &av.gid, gid, sizeof ( av.gid ) );
return ib_post_send ( ibdev, ipoib->data.qp, &av, iobuf );
}
@@ -617,33 +547,6 @@ static void ipoib_meta_complete_send ( struct ib_device *ibdev __unused,
free_iob ( iobuf );
}
/**
* Handle received IPoIB path record
*
* @v ipoib IPoIB device
* @v path_record Path record
*/
static void ipoib_recv_path_record ( struct ipoib_device *ipoib,
struct ib_path_record *path_record ) {
struct ipoib_peer *peer;
/* Locate peer cache entry */
peer = ipoib_lookup_peer_by_gid ( &path_record->dgid );
if ( ! peer ) {
DBGC ( ipoib, "IPoIB %p received unsolicited path record\n",
ipoib );
return;
}
/* Update path cache entry */
peer->lid = ntohs ( path_record->dlid );
peer->sl = ( path_record->reserved__sl & 0x0f );
peer->rate = ( path_record->rate_selector__rate & 0x3f );
DBG ( "IPoIB peer %x has dlid %x sl %x rate %x\n",
peer->key, peer->lid, peer->sl, peer->rate );
}
/**
* Handle received IPoIB multicast membership record
*
@@ -710,9 +613,6 @@ ipoib_meta_complete_recv ( struct ib_device *ibdev __unused,
}
switch ( sa->mad_hdr.tid[0] ) {
case IPOIB_TID_GET_PATH_REC:
ipoib_recv_path_record ( ipoib, &sa->sa_data.path_record );
break;
case IPOIB_TID_MC_MEMBER_REC:
ipoib_recv_mc_member_record ( ipoib,
&sa->sa_data.mc_member_record );