diff options
Diffstat (limited to 'drivers/scsi/bfa/n2n.c')
| -rw-r--r-- | drivers/scsi/bfa/n2n.c | 105 |
1 files changed, 105 insertions, 0 deletions
diff --git a/drivers/scsi/bfa/n2n.c b/drivers/scsi/bfa/n2n.c new file mode 100644 index 000000000000..735456824346 --- /dev/null +++ b/drivers/scsi/bfa/n2n.c @@ -0,0 +1,105 @@ +/* + * Copyright (c) 2005-2009 Brocade Communications Systems, Inc. + * All rights reserved + * www.brocade.com + * + * Linux driver for Brocade Fibre Channel Host Bus Adapter. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License (GPL) Version 2 as + * published by the Free Software Foundation + * + * 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. + */ + +/** + * n2n.c n2n implementation. + */ +#include <bfa.h> +#include <bfa_svc.h> +#include "fcs_lport.h" +#include "fcs_rport.h" +#include "fcs_trcmod.h" +#include "lport_priv.h" + +BFA_TRC_FILE(FCS, N2N); + +/** + * Called by fcs/port to initialize N2N topology. + */ +void +bfa_fcs_port_n2n_init(struct bfa_fcs_port_s *port) +{ +} + +/** + * Called by fcs/port to notify transition to online state. + */ +void +bfa_fcs_port_n2n_online(struct bfa_fcs_port_s *port) +{ + struct bfa_fcs_port_n2n_s *n2n_port = &port->port_topo.pn2n; + struct bfa_port_cfg_s *pcfg = &port->port_cfg; + struct bfa_fcs_rport_s *rport; + + bfa_trc(port->fcs, pcfg->pwwn); + + /* + * If our PWWN is > than that of the r-port, we have to initiate PLOGI + * and assign an Address. if not, we need to wait for its PLOGI. + * + * If our PWWN is < than that of the remote port, it will send a PLOGI + * with the PIDs assigned. The rport state machine take care of this + * incoming PLOGI. + */ + if (memcmp + ((void *)&pcfg->pwwn, (void *)&n2n_port->rem_port_wwn, + sizeof(wwn_t)) > 0) { + port->pid = N2N_LOCAL_PID; + /** + * First, check if we know the device by pwwn. + */ + rport = bfa_fcs_port_get_rport_by_pwwn(port, + n2n_port->rem_port_wwn); + if (rport) { + bfa_trc(port->fcs, rport->pid); + bfa_trc(port->fcs, rport->pwwn); + rport->pid = N2N_REMOTE_PID; + bfa_fcs_rport_online(rport); + return; + } + + /* + * In n2n there can be only one rport. Delete the old one whose + * pid should be zero, because it is offline. + */ + if (port->num_rports > 0) { + rport = bfa_fcs_port_get_rport_by_pid(port, 0); + bfa_assert(rport != NULL); + if (rport) { + bfa_trc(port->fcs, rport->pwwn); + bfa_fcs_rport_delete(rport); + } + } + bfa_fcs_rport_create(port, N2N_REMOTE_PID); + } +} + +/** + * Called by fcs/port to notify transition to offline state. + */ +void +bfa_fcs_port_n2n_offline(struct bfa_fcs_port_s *port) +{ + struct bfa_fcs_port_n2n_s *n2n_port = &port->port_topo.pn2n; + + bfa_trc(port->fcs, port->pid); + port->pid = 0; + n2n_port->rem_port_wwn = 0; + n2n_port->reply_oxid = 0; +} + + |