[SCSI] bfa: FC credit recovery and misc bug fixes.

- Introduce FC credit recovery.
- Added module parameter to enable/disable credit recovery.

Bug Fixes:
- Removed check for ignoring plogi from initiator in switched fabric mode.
- The ABTS for PLOGI is going out few millisecs earlier due to FW
  timer calibration (around 300 miilisecs earlier). So there is a
  window if an accept comes during this time HBA would have initiated
  an ABORT.
- Added 1 to FC_ELS_TOV for compensating for FW timer.

Signed-off-by: Krishna Gudipati <kgudipat@brocade.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>

1 files changed, 23 insertions, 2 deletions

diff --git a/drivers/scsi/bfa/bfa_svc.c b/drivers/scsi/bfa/bfa_svc.c
index 46e8cdd31db9..5373e5ddd4ad 100644
--- a/drivers/scsi/bfa/bfa_svc.c
+++ b/drivers/scsi/bfa/bfa_svc.c
@@ -1257,6 +1257,7 @@ bfa_lps_sm_login(struct bfa_lps_s *lps, enum bfa_lps_event event)
                 break;
 
         case BFA_LPS_SM_OFFLINE:
+        case BFA_LPS_SM_DELETE:
                 bfa_sm_set_state(lps, bfa_lps_sm_init);
                 break;
 
@@ -1285,6 +1286,7 @@ bfa_lps_sm_loginwait(struct bfa_lps_s *lps, enum bfa_lps_event event)
                 break;
 
         case BFA_LPS_SM_OFFLINE:
+        case BFA_LPS_SM_DELETE:
                 bfa_sm_set_state(lps, bfa_lps_sm_init);
                 bfa_reqq_wcancel(&lps->wqe);
                 break;
@@ -1409,6 +1411,7 @@ bfa_lps_sm_logout(struct bfa_lps_s *lps, enum bfa_lps_event event)
                 break;
 
         case BFA_LPS_SM_OFFLINE:
+        case BFA_LPS_SM_DELETE:
                 bfa_sm_set_state(lps, bfa_lps_sm_init);
                 break;
 
@@ -1433,6 +1436,7 @@ bfa_lps_sm_logowait(struct bfa_lps_s *lps, enum bfa_lps_event event)
                 break;
 
         case BFA_LPS_SM_OFFLINE:
+        case BFA_LPS_SM_DELETE:
                 bfa_sm_set_state(lps, bfa_lps_sm_init);
                 bfa_reqq_wcancel(&lps->wqe);
                 break;
@@ -1551,6 +1555,7 @@ bfa_lps_login_rsp(struct bfa_s *bfa, struct bfi_lps_login_rsp_s *rsp)
                 lps->lp_mac     = rsp->lp_mac;
                 lps->brcd_switch = rsp->brcd_switch;
                 lps->fcf_mac    = rsp->fcf_mac;
+                lps->pr_bbscn   = rsp->bb_scn;
 
                 break;
 
@@ -1647,6 +1652,7 @@ bfa_lps_send_login(struct bfa_lps_s *lps)
         m->nwwn         = lps->nwwn;
         m->fdisc        = lps->fdisc;
         m->auth_en      = lps->auth_en;
+        m->bb_scn       = lps->bb_scn;
 
         bfa_reqq_produce(lps->bfa, lps->reqq);
 }
@@ -1838,7 +1844,7 @@ bfa_lps_delete(struct bfa_lps_s *lps)
  */
 void
 bfa_lps_flogi(struct bfa_lps_s *lps, void *uarg, u8 alpa, u16 pdusz,
-        wwn_t pwwn, wwn_t nwwn, bfa_boolean_t auth_en)
+        wwn_t pwwn, wwn_t nwwn, bfa_boolean_t auth_en, uint8_t bb_scn)
 {
         lps->uarg       = uarg;
         lps->alpa       = alpa;
@@ -1847,6 +1853,7 @@ bfa_lps_flogi(struct bfa_lps_s *lps, void *uarg, u8 alpa, u16 pdusz,
         lps->nwwn       = nwwn;
         lps->fdisc      = BFA_FALSE;
         lps->auth_en    = auth_en;
+        lps->bb_scn     = bb_scn;
         bfa_sm_send_event(lps, BFA_LPS_SM_LOGIN);
 }
 
@@ -2900,6 +2907,7 @@ bfa_fcport_reset_linkinfo(struct bfa_fcport_s *fcport)
 {
         fcport->speed = BFA_PORT_SPEED_UNKNOWN;
         fcport->topology = BFA_PORT_TOPOLOGY_NONE;
+        fcport->bbsc_op_state = BFA_FALSE;
 }
 
 /*
@@ -3010,6 +3018,7 @@ bfa_fcport_send_txcredit(void *port_cbarg)
         bfi_h2i_set(m->mh, BFI_MC_FCPORT, BFI_FCPORT_H2I_SET_SVC_PARAMS_REQ,
                         bfa_lpuid(fcport->bfa));
         m->tx_bbcredit = cpu_to_be16((u16)fcport->cfg.tx_bbcredit);
+        m->bb_scn = fcport->cfg.bb_scn;
 
         /*
          * queue I/O message to firmware
@@ -3626,11 +3635,14 @@ bfa_fcport_get_rx_bbcredit(struct bfa_s *bfa)
 }
 
 void
-bfa_fcport_set_tx_bbcredit(struct bfa_s *bfa, u16 tx_bbcredit)
+bfa_fcport_set_tx_bbcredit(struct bfa_s *bfa, u16 tx_bbcredit, u8 bb_scn)
 {
         struct bfa_fcport_s *fcport = BFA_FCPORT_MOD(bfa);
 
         fcport->cfg.tx_bbcredit = (u8)tx_bbcredit;
+        fcport->cfg.bb_scn = bb_scn;
+        if (bb_scn)
+                fcport->bbsc_op_state = BFA_TRUE;
         bfa_fcport_send_txcredit(fcport);
 }
 
@@ -3683,6 +3695,7 @@ bfa_fcport_get_attr(struct bfa_s *bfa, struct bfa_port_attr_s *attr)
         attr->pport_cfg.path_tov  = bfa_fcpim_path_tov_get(bfa);
         attr->pport_cfg.q_depth  = bfa_fcpim_qdepth_get(bfa);
         attr->port_state = bfa_sm_to_state(hal_port_sm_table, fcport->sm);
+        attr->bbsc_op_status =  fcport->bbsc_op_state;
 
         /* PBC Disabled State */
         if (bfa_fcport_is_pbcdisabled(bfa))
@@ -3805,6 +3818,14 @@ bfa_fcport_is_qos_enabled(struct bfa_s *bfa)
         return fcport->cfg.qos_enabled;
 }
 
+bfa_boolean_t
+bfa_fcport_is_trunk_enabled(struct bfa_s *bfa)
+{
+        struct bfa_fcport_s *fcport = BFA_FCPORT_MOD(bfa);
+
+        return fcport->cfg.trunked;
+}
+
 /*
  * Rport State machine functions
  */