#include <gpxe/netdevice.h>
#include <gpxe/infiniband.h>
#include <gpxe/ib_qset.h>
+#include <gpxe/ib_pathrec.h>
#include <gpxe/ipoib.h>
/** @file
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
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
****************************************************************************
*/
-/**
- * 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
*
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 ) ) {
/* 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 );
}
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
*
}
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 );
--- /dev/null
+/*
+ * Copyright (C) 2009 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.
+ */
+
+FILE_LICENCE ( GPL2_OR_LATER );
+
+#include <stdint.h>
+#include <string.h>
+#include <byteswap.h>
+#include <errno.h>
+#include <gpxe/infiniband.h>
+#include <gpxe/ib_gma.h>
+#include <gpxe/ib_pathrec.h>
+
+/** @file
+ *
+ * Infiniband path lookups
+ *
+ */
+
+/** Number of path record cache entries
+ *
+ * Must be a power of two.
+ */
+#define IB_NUM_CACHED_PATHS 4
+
+/** A path record cache entry */
+struct ib_cached_path_record {
+ /** Infiniband device's port GID
+ *
+ * Used to disambiguate cache entries when we have multiple
+ * Infiniband devices, without having to maintain a pointer to
+ * the Infiniband device.
+ */
+ struct ib_gid sgid;
+ /** Destination GID */
+ struct ib_gid dgid;
+ /** Destination LID */
+ unsigned int dlid;
+ /** Rate */
+ unsigned int rate;
+ /** Service level */
+ unsigned int sl;
+};
+
+/** Path record cache */
+static struct ib_cached_path_record ib_path_cache[IB_NUM_CACHED_PATHS];
+
+/** Oldest path record cache entry index */
+static unsigned int ib_path_cache_idx;
+
+/**
+ * Find path record cache entry
+ *
+ * @v ibdev Infiniband device
+ * @v dgid Destination GID
+ * @ret cached Path record cache entry, or NULL
+ */
+static struct ib_cached_path_record *
+ib_find_path_cache_entry ( struct ib_device *ibdev, struct ib_gid *dgid ) {
+ struct ib_cached_path_record *cached;
+ unsigned int i;
+
+ for ( i = 0 ; i < IB_NUM_CACHED_PATHS ; i++ ) {
+ cached = &ib_path_cache[i];
+ if ( memcmp ( &cached->sgid, &ibdev->gid,
+ sizeof ( cached->sgid ) ) != 0 )
+ continue;
+ if ( memcmp ( &cached->dgid, dgid,
+ sizeof ( cached->dgid ) ) != 0 )
+ continue;
+ return cached;
+ }
+
+ return NULL;
+}
+
+/**
+ * Resolve path record
+ *
+ * @v ibdev Infiniband device
+ * @v av Address vector to complete
+ * @ret rc Return status code
+ */
+int ib_resolve_path ( struct ib_device *ibdev,
+ struct ib_address_vector *av ) {
+ struct ib_gid *gid = &av->gid;
+ struct ib_cached_path_record *cached;
+ union ib_mad mad;
+ struct ib_mad_sa *sa = &mad.sa;
+ unsigned int cache_idx;
+ int rc;
+
+ /* Sanity check */
+ if ( ! av->gid_present ) {
+ DBGC ( ibdev, "IBDEV %p attempt to look up path record "
+ "without GID\n", ibdev );
+ return -EINVAL;
+ }
+
+ /* Look in cache for a matching entry */
+ cached = ib_find_path_cache_entry ( ibdev, gid );
+ if ( cached && cached->dlid ) {
+ /* Populated entry found */
+ av->lid = cached->dlid;
+ av->rate = cached->rate;
+ av->sl = cached->sl;
+ DBGC2 ( ibdev, "IBDEV %p cache hit for %08x:%08x:%08x:%08x\n",
+ ibdev, htonl ( gid->u.dwords[0] ),
+ htonl ( gid->u.dwords[1] ), htonl ( gid->u.dwords[2] ),
+ htonl ( gid->u.dwords[3] ) );
+ return 0;
+ }
+ DBGC ( ibdev, "IBDEV %p cache miss for %08x:%08x:%08x:%08x%s\n", ibdev,
+ htonl ( gid->u.dwords[0] ), htonl ( gid->u.dwords[1] ),
+ htonl ( gid->u.dwords[2] ), htonl ( gid->u.dwords[3] ),
+ ( cached ? " (in progress)" : "" ) );
+
+ /* If no unresolved entry was found, then create a new one */
+ if ( ! cached ) {
+ cache_idx = ( (ib_path_cache_idx++) % IB_NUM_CACHED_PATHS );
+ cached = &ib_path_cache[cache_idx];
+ memset ( cached, 0, sizeof ( *cached ) );
+ memcpy ( &cached->sgid, &ibdev->gid, sizeof ( cached->sgid ) );
+ memcpy ( &cached->dgid, gid, sizeof ( cached->dgid ) );
+ }
+
+ /* Construct path record request */
+ memset ( sa, 0, sizeof ( *sa ) );
+ sa->mad_hdr.base_version = IB_MGMT_BASE_VERSION;
+ sa->mad_hdr.mgmt_class = IB_MGMT_CLASS_SUBN_ADM;
+ sa->mad_hdr.class_version = IB_SA_CLASS_VERSION;
+ sa->mad_hdr.method = IB_MGMT_METHOD_GET;
+ sa->mad_hdr.attr_id = htons ( IB_SA_ATTR_PATH_REC );
+ sa->sa_hdr.comp_mask[1] =
+ htonl ( IB_SA_PATH_REC_DGID | IB_SA_PATH_REC_SGID );
+ memcpy ( &sa->sa_data.path_record.dgid, &cached->dgid,
+ sizeof ( sa->sa_data.path_record.dgid ) );
+ memcpy ( &sa->sa_data.path_record.sgid, &cached->sgid,
+ sizeof ( sa->sa_data.path_record.sgid ) );
+
+ /* Issue path record request */
+ if ( ( rc = ib_gma_request ( &ibdev->gma, &mad, NULL ) ) != 0 ) {
+ DBGC ( ibdev, "IBDEV %p could not get path record: %s\n",
+ ibdev, strerror ( rc ) );
+ return rc;
+ }
+
+ /* Not found yet */
+ return -ENOENT;
+}
+
+/**
+ * Handle path record response
+ *
+ * @v ibdev Infiniband device
+ * @v mad MAD
+ * @ret rc Return status code
+ */
+static int ib_handle_path_record ( struct ib_device *ibdev,
+ union ib_mad *mad ) {
+ struct ib_path_record *path_record = &mad->sa.sa_data.path_record;
+ struct ib_gid *dgid = &path_record->dgid;
+ struct ib_cached_path_record *cached;
+ unsigned int dlid;
+ unsigned int sl;
+ unsigned int rate;
+
+ /* Ignore if not a success */
+ if ( mad->hdr.status != htons ( IB_MGMT_STATUS_OK ) ) {
+ DBGC ( ibdev, "IBDEV %p path record lookup failed with status "
+ "%04x\n", ibdev, ntohs ( mad->hdr.status ) );
+ return -EINVAL;
+ }
+
+ /* Extract values from MAD */
+ dlid = ntohs ( path_record->dlid );
+ sl = ( path_record->reserved__sl & 0x0f );
+ rate = ( path_record->rate_selector__rate & 0x3f );
+ DBGC ( ibdev, "IBDEV %p path to %08x:%08x:%08x:%08x is %04x sl %d "
+ "rate %d\n", ibdev, htonl ( dgid->u.dwords[0] ),
+ htonl ( dgid->u.dwords[1] ), htonl ( dgid->u.dwords[2] ),
+ htonl ( dgid->u.dwords[3] ), dlid, sl, rate );
+
+ /* Look for a matching cache entry to fill in */
+ if ( ( cached = ib_find_path_cache_entry ( ibdev, dgid ) ) != NULL ) {
+ DBGC ( ibdev, "IBDEV %p cache add for %08x:%08x:%08x:%08x\n",
+ ibdev, htonl ( dgid->u.dwords[0] ),
+ htonl ( dgid->u.dwords[1] ),
+ htonl ( dgid->u.dwords[2] ),
+ htonl ( dgid->u.dwords[3] ) );
+ cached->dlid = dlid;
+ cached->rate = rate;
+ cached->sl = sl;
+ }
+
+ return 0;
+}
+
+/** Path record response handler */
+struct ib_mad_handler ib_path_record_handler __ib_mad_handler = {
+ .mgmt_class = IB_MGMT_CLASS_SUBN_ADM,
+ .class_version = IB_SA_CLASS_VERSION,
+ .method = IB_MGMT_METHOD_GET_RESP,
+ .attr_id = htons ( IB_SA_ATTR_PATH_REC ),
+ .handle = ib_handle_path_record,
+};
http://git.etherboot.org / people / oremanj / gpxe.git / commitdiff