[SCSI] bfa: Add PowerPC support and enable PCIE AER handling.

- Added few missing endian swap changes to support BFA on PowerPC.
- Added PCIE AER support to BFA:
  a) Implemented the PCI error handler entry points.
  b) Made changes to FCS state machine to handle STOP event from the
	 PCI error detected entry point.
  c) Made changes to the IO Controller state machine to handle SUSPEND
     event from the PCI error detected entry point.
  d) Made changes to restart the BFA operations on a slot_reset completion.

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

1 files changed, 133 insertions, 0 deletions

diff --git a/drivers/scsi/bfa/bfa_fcs.c b/drivers/scsi/bfa/bfa_fcs.c
index 3f71d504e398..671a1a227f94 100644
--- a/drivers/scsi/bfa/bfa_fcs.c
+++ b/drivers/scsi/bfa/bfa_fcs.c
@@ -119,6 +119,18 @@ bfa_fcs_update_cfg(struct bfa_fcs_s *fcs)
 }
 
 /*
+ * Stop FCS operations.
+ */
+void
+bfa_fcs_stop(struct bfa_fcs_s *fcs)
+{
+	bfa_wc_init(&fcs->wc, bfa_fcs_exit_comp, fcs);
+	bfa_wc_up(&fcs->wc);
+	bfa_fcs_fabric_modstop(fcs);
+	bfa_wc_wait(&fcs->wc);
+}
+
+/*
  * fcs pbc vport initialization
  */
 void
@@ -213,6 +225,8 @@ static void bfa_fcs_fabric_notify_offline(struct bfa_fcs_fabric_s *fabric);
 static void bfa_fcs_fabric_delay(void *cbarg);
 static void bfa_fcs_fabric_delete(struct bfa_fcs_fabric_s *fabric);
 static void bfa_fcs_fabric_delete_comp(void *cbarg);
+static void bfa_fcs_fabric_stop(struct bfa_fcs_fabric_s *fabric);
+static void bfa_fcs_fabric_stop_comp(void *cbarg);
 static void bfa_fcs_fabric_process_uf(struct bfa_fcs_fabric_s *fabric,
 				      struct fchs_s *fchs, u16 len);
 static void bfa_fcs_fabric_process_flogi(struct bfa_fcs_fabric_s *fabric,
@@ -250,6 +264,10 @@ static void	bfa_fcs_fabric_sm_isolated(struct bfa_fcs_fabric_s *fabric,
 					   enum bfa_fcs_fabric_event event);
 static void	bfa_fcs_fabric_sm_deleting(struct bfa_fcs_fabric_s *fabric,
 					   enum bfa_fcs_fabric_event event);
+static void	bfa_fcs_fabric_sm_stopping(struct bfa_fcs_fabric_s *fabric,
+					   enum bfa_fcs_fabric_event event);
+static void	bfa_fcs_fabric_sm_cleanup(struct bfa_fcs_fabric_s *fabric,
+					  enum bfa_fcs_fabric_event event);
 /*
  *   Beginning state before fabric creation.
  */
@@ -334,6 +352,11 @@ bfa_fcs_fabric_sm_linkdown(struct bfa_fcs_fabric_s *fabric,
 		bfa_fcs_fabric_delete(fabric);
 		break;
 
+	case BFA_FCS_FABRIC_SM_STOP:
+		bfa_sm_set_state(fabric, bfa_fcs_fabric_sm_cleanup);
+		bfa_fcs_fabric_stop(fabric);
+		break;
+
 	default:
 		bfa_sm_fault(fabric->fcs, event);
 	}
@@ -585,6 +608,11 @@ bfa_fcs_fabric_sm_online(struct bfa_fcs_fabric_s *fabric,
 		bfa_fcs_fabric_delete(fabric);
 		break;
 
+	case BFA_FCS_FABRIC_SM_STOP:
+		bfa_sm_set_state(fabric, bfa_fcs_fabric_sm_stopping);
+		bfa_fcs_fabric_stop(fabric);
+		break;
+
 	case BFA_FCS_FABRIC_SM_AUTH_FAILED:
 		bfa_sm_set_state(fabric, bfa_fcs_fabric_sm_auth_failed);
 		bfa_sm_send_event(fabric->lps, BFA_LPS_SM_OFFLINE);
@@ -682,7 +710,62 @@ bfa_fcs_fabric_sm_deleting(struct bfa_fcs_fabric_s *fabric,
 	}
 }
 
+/*
+ * Fabric is being stopped, awaiting vport stop completions.
+ */
+static void
+bfa_fcs_fabric_sm_stopping(struct bfa_fcs_fabric_s *fabric,
+			   enum bfa_fcs_fabric_event event)
+{
+	bfa_trc(fabric->fcs, fabric->bport.port_cfg.pwwn);
+	bfa_trc(fabric->fcs, event);
+
+	switch (event) {
+	case BFA_FCS_FABRIC_SM_STOPCOMP:
+		bfa_sm_set_state(fabric, bfa_fcs_fabric_sm_cleanup);
+		bfa_sm_send_event(fabric->lps, BFA_LPS_SM_LOGOUT);
+		break;
+
+	case BFA_FCS_FABRIC_SM_LINK_UP:
+		break;
+
+	case BFA_FCS_FABRIC_SM_LINK_DOWN:
+		bfa_sm_set_state(fabric, bfa_fcs_fabric_sm_cleanup);
+		break;
+
+	default:
+		bfa_sm_fault(fabric->fcs, event);
+	}
+}
+
+/*
+ * Fabric is being stopped, cleanup without FLOGO
+ */
+static void
+bfa_fcs_fabric_sm_cleanup(struct bfa_fcs_fabric_s *fabric,
+			  enum bfa_fcs_fabric_event event)
+{
+	bfa_trc(fabric->fcs, fabric->bport.port_cfg.pwwn);
+	bfa_trc(fabric->fcs, event);
+
+	switch (event) {
+	case BFA_FCS_FABRIC_SM_STOPCOMP:
+	case BFA_FCS_FABRIC_SM_LOGOCOMP:
+		bfa_sm_set_state(fabric, bfa_fcs_fabric_sm_created);
+		bfa_wc_down(&(fabric->fcs)->wc);
+		break;
+
+	case BFA_FCS_FABRIC_SM_LINK_DOWN:
+		/*
+		 * Ignore - can get this event if we get notified about IOC down
+		 * before the fabric completion callbk is done.
+		 */
+		break;
 
+	default:
+		bfa_sm_fault(fabric->fcs, event);
+	}
+}
 
 /*
  *  fcs_fabric_private fabric private functions
@@ -919,6 +1002,28 @@ bfa_fcs_fabric_delay(void *cbarg)
 }
 
 /*
+ * Stop all vports and wait for vport stop completions.
+ */
+static void
+bfa_fcs_fabric_stop(struct bfa_fcs_fabric_s *fabric)
+{
+	struct bfa_fcs_vport_s *vport;
+	struct list_head	*qe, *qen;
+
+	bfa_wc_init(&fabric->stop_wc, bfa_fcs_fabric_stop_comp, fabric);
+
+	list_for_each_safe(qe, qen, &fabric->vport_q) {
+		vport = (struct bfa_fcs_vport_s *) qe;
+		bfa_wc_up(&fabric->stop_wc);
+		bfa_fcs_vport_fcs_stop(vport);
+	}
+
+	bfa_wc_up(&fabric->stop_wc);
+	bfa_fcs_lport_stop(&fabric->bport);
+	bfa_wc_wait(&fabric->stop_wc);
+}
+
+/*
  * Computes operating BB_SCN value
  */
 static u8
@@ -978,6 +1083,14 @@ bfa_fcs_fabric_delete_comp(void *cbarg)
 	bfa_sm_send_event(fabric, BFA_FCS_FABRIC_SM_DELCOMP);
 }
 
+static void
+bfa_fcs_fabric_stop_comp(void *cbarg)
+{
+	struct bfa_fcs_fabric_s *fabric = cbarg;
+
+	bfa_sm_send_event(fabric, BFA_FCS_FABRIC_SM_STOPCOMP);
+}
+
 /*
  *  fcs_fabric_public fabric public functions
  */
@@ -1039,6 +1152,19 @@ bfa_fcs_fabric_modexit(struct bfa_fcs_s *fcs)
 }
 
 /*
+ * Fabric module stop -- stop FCS actions
+ */
+void
+bfa_fcs_fabric_modstop(struct bfa_fcs_s *fcs)
+{
+	struct bfa_fcs_fabric_s *fabric;
+
+	bfa_trc(fcs, 0);
+	fabric = &fcs->fabric;
+	bfa_sm_send_event(fabric, BFA_FCS_FABRIC_SM_STOP);
+}
+
+/*
  * Fabric module start -- kick starts FCS actions
  */
 void
@@ -1387,6 +1513,13 @@ bfa_fcs_fabric_set_fabric_name(struct bfa_fcs_fabric_s *fabric,
 	}
 }
 
+void
+bfa_cb_lps_flogo_comp(void *bfad, void *uarg)
+{
+	struct bfa_fcs_fabric_s *fabric = uarg;
+	bfa_sm_send_event(fabric, BFA_FCS_FABRIC_SM_LOGOCOMP);
+}
+
 /*
  *	Returns FCS vf structure for a given vf_id.
  *