Prepare for adding a metadata queue to IPoIB

src/drivers/net/ipoib.c

 #define IPOIB_MTU 2048
 
 /** Number of IPoIB send work queue entries */
-#define IPOIB_NUM_SEND_WQES 8
+#define IPOIB_DATA_NUM_SEND_WQES 4
 
 /** Number of IPoIB receive work queue entries */
-#define IPOIB_NUM_RECV_WQES 8
+#define IPOIB_DATA_NUM_RECV_WQES 8
 
 /** Number of IPoIB completion entries */
-#define IPOIB_NUM_CQES 8
+#define IPOIB_DATA_NUM_CQES 8
 
-struct ipoib_device {
-	struct ib_device *ibdev;
+/** An IPoIB queue set */
+struct ipoib_queue_set {
+	/** Completion queue */
 	struct ib_completion_queue *cq;
+	/** Queue pair */
 	struct ib_queue_pair *qp;
-	unsigned int rx_fill;
+	/** Receive work queue fill level */
+	unsigned int recv_fill;
+	/** Receive work queue maximum fill level */
+	unsigned int recv_max_fill;
+};
+
+/** An IPoIB device */
+struct ipoib_device {
+	/** Network device */
+	struct net_device *netdev;
+	/** Underlying Infiniband device */
+	struct ib_device *ibdev;
+	/** Data queue set */
+	struct ipoib_queue_set data;
+	/** Data queue set */
+	struct ipoib_queue_set meta;
 };
 
 /****************************************************************************
  ****************************************************************************
  */
 
+/**
+ * Destroy queue set
+ *
+ * @v ipoib		IPoIB device
+ * @v qset		Queue set
+ */
+static void ipoib_destroy_qset ( struct ipoib_device *ipoib,
+				 struct ipoib_queue_set *qset ) {
+	struct ib_device *ibdev = ipoib->ibdev;
+
+	if ( qset->qp )
+		ib_destroy_qp ( ibdev, qset->qp );
+	if ( qset->cq )
+		ib_destroy_cq ( ibdev, qset->cq );
+	memset ( qset, 0, sizeof ( *qset ) );
+}
+
+/**
+ * Create queue set
+ *
+ * @v ipoib		IPoIB device
+ * @v qset		Queue set
+ * @ret rc		Return status code
+ */
+static int ipoib_create_qset ( struct ipoib_device *ipoib,
+			       struct ipoib_queue_set *qset,
+			       unsigned int num_cqes,
+			       unsigned int num_send_wqes,
+			       unsigned int num_recv_wqes,
+			       unsigned long qkey ) {
+	struct ib_device *ibdev = ipoib->ibdev;
+	int rc;
+
+	/* Store queue parameters */
+	qset->recv_max_fill = num_recv_wqes;
+
+	/* Allocate completion queue */
+	qset->cq = ib_create_cq ( ibdev, num_cqes );
+	if ( ! qset->cq ) {
+		DBGC ( ipoib, "IPoIB %p could not allocate completion queue\n",
+		       ipoib );
+		rc = -ENOMEM;
+		goto err;
+	}
+
+	/* Allocate queue pair */
+	qset->qp = ib_create_qp ( ibdev, num_send_wqes, qset->cq,
+				  num_recv_wqes, qset->cq, qkey );
+	if ( ! qset->qp ) {
+		DBGC ( ipoib, "IPoIB %p could not allocate queue pair\n",
+		       ipoib );
+		rc = -ENOMEM;
+		goto err;
+	}
+	qset->qp->owner_priv = ipoib->netdev;
+
+	return 0;
+
+ err:
+	ipoib_destroy_qset ( ipoib, qset );
+	return rc;
+}
+
 /**
  * Transmit packet via IPoIB network device
  *
 	}
 
 	iob_pull ( iobuf, ( sizeof ( *ipoib_pshdr ) ) );
-	return ib_post_send ( ibdev, ipoib->qp,
+	return ib_post_send ( ibdev, ipoib->data.qp,
 			      &hack_ipoib_bcast_av, iobuf );
 }
 
  * @v completion	Completion
  * @v iobuf		I/O buffer
  */
-static void ipoib_complete_send ( struct ib_device *ibdev __unused,
-				  struct ib_queue_pair *qp,
-				  struct ib_completion *completion,
-				  struct io_buffer *iobuf ) {
+static void ipoib_data_complete_send ( struct ib_device *ibdev __unused,
+				       struct ib_queue_pair *qp,
+				       struct ib_completion *completion,
+				       struct io_buffer *iobuf ) {
 	struct net_device *netdev = qp->owner_priv;
 
 	netdev_tx_complete_err ( netdev, iobuf,
  * @v completion	Completion
  * @v iobuf		I/O buffer
  */
-static void ipoib_complete_recv ( struct ib_device *ibdev __unused,
-				  struct ib_queue_pair *qp,
-				  struct ib_completion *completion,
-				  struct io_buffer *iobuf ) {
+static void ipoib_data_complete_recv ( struct ib_device *ibdev __unused,
+				       struct ib_queue_pair *qp,
+				       struct ib_completion *completion,
+				       struct io_buffer *iobuf ) {
 	struct net_device *netdev = qp->owner_priv;
 	struct ipoib_device *ipoib = netdev->priv;
 	struct ib_global_route_header *grh = iobuf->data;
 		netdev_rx ( netdev, iobuf );
 	}
 
-	ipoib->rx_fill--;
+	ipoib->data.recv_fill--;
 }
 
 /**
  *
  * @v ipoib		IPoIB device
  */
-static void ipoib_refill_recv ( struct ipoib_device *ipoib ) {
+static void ipoib_refill_recv ( struct ipoib_device *ipoib,
+				struct ipoib_queue_set *qset ) {
 	struct ib_device *ibdev = ipoib->ibdev;
 	struct io_buffer *iobuf;
 	int rc;
 
-	while ( ipoib->rx_fill < IPOIB_NUM_RECV_WQES ) {
+	while ( qset->recv_fill < qset->recv_max_fill ) {
 		iobuf = alloc_iob ( IPOIB_MTU );
 		if ( ! iobuf )
 			break;
-		if ( ( rc = ib_post_recv ( ibdev, ipoib->qp,
-					   iobuf ) ) != 0 ) {
+		if ( ( rc = ib_post_recv ( ibdev, qset->qp, iobuf ) ) != 0 ) {
 			free_iob ( iobuf );
 			break;
 		}
-		ipoib->rx_fill++;
+		qset->recv_fill++;
 	}
 }
 
 	struct ipoib_device *ipoib = netdev->priv;
 	struct ib_device *ibdev = ipoib->ibdev;
 
-	ib_poll_cq ( ibdev, ipoib->cq, ipoib_complete_send,
-		     ipoib_complete_recv );
-	ipoib_refill_recv ( ipoib );
+	ib_poll_cq ( ibdev, ipoib->data.cq, ipoib_data_complete_send,
+		     ipoib_data_complete_recv );
+	ipoib_refill_recv ( ipoib, &ipoib->data );
 }
 
 /**
 	int rc;
 
 	/* Attach to broadcast multicast GID */
-	if ( ( rc = ib_mcast_attach ( ibdev, ipoib->qp,
+	if ( ( rc = ib_mcast_attach ( ibdev, ipoib->data.qp,
 				      &ibdev->broadcast_gid ) ) != 0 ) {
 		DBG ( "Could not attach to broadcast GID: %s\n",
 		      strerror ( rc ) );
 	}
 
 	/* Fill receive ring */
-	ipoib_refill_recv ( ipoib );
+	ipoib_refill_recv ( ipoib, &ipoib->data );
 
 	return 0;
 }
 	struct ib_device *ibdev = ipoib->ibdev;
 
 	/* Detach from broadcast multicast GID */
-	ib_mcast_detach ( ibdev, ipoib->qp, &ipoib_broadcast.gid );
+	ib_mcast_detach ( ibdev, ipoib->data.qp, &ipoib_broadcast.gid );
 
 	/* FIXME: should probably flush the receive ring */
 }
 	ib_set_ownerdata ( ibdev, netdev );
 	netdev->dev = ibdev->dev;
 	memset ( ipoib, 0, sizeof ( *ipoib ) );
+	ipoib->netdev = netdev;
 	ipoib->ibdev = ibdev;
 
-	/* Allocate completion queue */
-	ipoib->cq = ib_create_cq ( ibdev, IPOIB_NUM_CQES );
-	if ( ! ipoib->cq ) {
-		DBGC ( ipoib, "IPoIB %p could not allocate completion queue\n",
-		       ipoib );
-		rc = -ENOMEM;
-		goto err_create_cq;
-	}
-
-	/* Allocate queue pair */
-	ipoib->qp = ib_create_qp ( ibdev, IPOIB_NUM_SEND_WQES,
-				   ipoib->cq, IPOIB_NUM_RECV_WQES,
-				   ipoib->cq, hack_ipoib_qkey );
-	if ( ! ipoib->qp ) {
-		DBGC ( ipoib, "IPoIB %p could not allocate queue pair\n",
-		       ipoib );
-		rc = -ENOMEM;
-		goto err_create_qp;
+	/* 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;
 	}
-	ipoib->qp->owner_priv = netdev;
 
 	/* Construct MAC address */
 	mac = ( ( struct ipoib_mac * ) netdev->ll_addr );
-	mac->qpn = htonl ( ipoib->qp->qpn );
+	mac->qpn = htonl ( ipoib->data.qp->qpn );
 	memcpy ( &mac->gid, &ibdev->port_gid, sizeof ( mac->gid ) );
 
 	/* Register network device */
 	return 0;
 
  err_register_netdev:
-	ib_destroy_qp ( ibdev, ipoib->qp );
- err_create_qp:
-	ib_destroy_cq ( ibdev, ipoib->cq );
- err_create_cq:
+	ipoib_destroy_qset ( ipoib, &ipoib->data );
+ err_create_data_qset:
 	netdev_nullify ( netdev );
 	netdev_put ( netdev );
 	return rc;

src/net/infiniband.c

 	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 );
 }
 
 void free_ibdev ( struct ib_device *ibdev ) {
 	free ( ibdev );
 }
-
-
-#if 0
-
-/** Infiniband broadcast MAC address */
-static uint8_t ib_broadcast[IB_ALEN] = { 0xff, };
-
-/**
- * Transmit Infiniband packet
- *
- * @v iobuf		I/O buffer
- * @v netdev		Network device
- * @v net_protocol	Network-layer protocol
- * @v ll_dest		Link-layer destination address
- *
- * Prepends the Infiniband link-layer header and transmits the packet.
- */
-static int ib_tx ( struct io_buffer *iobuf, struct net_device *netdev,
-		   struct net_protocol *net_protocol, const void *ll_dest ) {
-	struct ibhdr *ibhdr = iob_push ( iobuf, sizeof ( *ibhdr ) );
-
-	/* Build Infiniband header */
-	ibhdr->proto = net_protocol->net_proto;
-	ibhdr->reserved = 0;
-
-	( void ) ll_dest;
-
-	/* Hand off to network device */
-	return netdev_tx ( netdev, iobuf );
-}
-
-/**
- * Process received Infiniband packet
- *
- * @v iobuf	I/O buffer
- * @v netdev	Network device
- *
- * Strips off the Infiniband link-layer header and passes up to the
- * network-layer protocol.
- */
-static int ib_rx ( struct io_buffer *iobuf, struct net_device *netdev ) {
-	struct ibhdr *ibhdr = iobuf->data;
-
-	/* Sanity check */
-	if ( iob_len ( iobuf ) < sizeof ( *ibhdr ) ) {
-		DBG ( "Infiniband packet too short (%d bytes)\n",
-		      iob_len ( iobuf ) );
-		free_iob ( iobuf );
-		return -EINVAL;
-	}
-
-	/* Strip off Infiniband header */
-	iob_pull ( iobuf, sizeof ( *ibhdr ) );
-
-	/* Hand off to network-layer protocol */
-	return net_rx ( iobuf, netdev, ibhdr->proto, NULL );
-}
-
-/**
- * Transcribe Infiniband address
- *
- * @v ll_addr	Link-layer address
- * @ret string	Link-layer address in human-readable format
- */
-const char * ib_ntoa ( const void *ll_addr ) {
-	static char buf[61];
-	const uint8_t *ib_addr = ll_addr;
-	unsigned int i;
-	char *p = buf;
-
-	for ( i = 0 ; i < IB_ALEN ; i++ ) {
-		p += sprintf ( p, ":%02x", ib_addr[i] );
-	}
-	return ( buf + 1 );
-}
-
-/** Infiniband protocol */
-struct ll_protocol infiniband_protocol __ll_protocol = {
-	.name		= "Infiniband",
-	.ll_proto	= htons ( ARPHRD_INFINIBAND ),
-	.ll_addr_len	= IB_ALEN,
-	.ll_header_len	= IB_HLEN,
-	.ll_broadcast	= ib_broadcast,
-	.tx		= ib_tx,
-	.rx		= ib_rx,
-	.ntoa		= ib_ntoa,
-};
-
-#endif