[SCSI] bfa: Add FC-transport based Asynchronous Event Notification support.

- Added support to post vendor unique events on fc_host.
- Supports adapter, port, ioc, flash and remote port based AEN events.

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

1 files changed, 35 insertions, 2 deletions

diff --git a/drivers/scsi/bfa/bfa_fcs_fcpim.c b/drivers/scsi/bfa/bfa_fcs_fcpim.c
index 29b4108be26..9272840a240 100644
--- a/drivers/scsi/bfa/bfa_fcs_fcpim.c
+++ b/drivers/scsi/bfa/bfa_fcs_fcpim.c
@@ -37,6 +37,8 @@ static void	bfa_fcs_itnim_prli_response(void *fcsarg,
                          struct bfa_fcxp_s *fcxp, void *cbarg,
                             bfa_status_t req_status, u32 rsp_len,
                             u32 resid_len, struct fchs_s *rsp_fchs);
+static void     bfa_fcs_itnim_aen_post(struct bfa_fcs_itnim_s *itnim,
+                        enum bfa_itnim_aen_event event);
 
 /*
  *  fcs_itnim_sm FCS itnim state machine events
@@ -269,6 +271,7 @@ bfa_fcs_itnim_sm_hcb_online(struct bfa_fcs_itnim_s *itnim,
                 BFA_LOG(KERN_INFO, bfad, bfa_log_level,
                 "Target (WWN = %s) is online for initiator (WWN = %s)\n",
                 rpwwn_buf, lpwwn_buf);
+                bfa_fcs_itnim_aen_post(itnim, BFA_ITNIM_AEN_ONLINE);
                 break;
 
         case BFA_FCS_ITNIM_SM_OFFLINE:
@@ -305,14 +308,17 @@ bfa_fcs_itnim_sm_online(struct bfa_fcs_itnim_s *itnim,
                 bfa_itnim_offline(itnim->bfa_itnim);
                 wwn2str(lpwwn_buf, bfa_fcs_lport_get_pwwn(itnim->rport->port));
                 wwn2str(rpwwn_buf, itnim->rport->pwwn);
-                if (bfa_fcs_lport_is_online(itnim->rport->port) == BFA_TRUE)
+                if (bfa_fcs_lport_is_online(itnim->rport->port) == BFA_TRUE) {
                         BFA_LOG(KERN_ERR, bfad, bfa_log_level,
                         "Target (WWN = %s) connectivity lost for "
                         "initiator (WWN = %s)\n", rpwwn_buf, lpwwn_buf);
-                else
+                        bfa_fcs_itnim_aen_post(itnim, BFA_ITNIM_AEN_DISCONNECT);
+                } else {
                         BFA_LOG(KERN_INFO, bfad, bfa_log_level,
                         "Target (WWN = %s) offlined by initiator (WWN = %s)\n",
                         rpwwn_buf, lpwwn_buf);
+                        bfa_fcs_itnim_aen_post(itnim, BFA_ITNIM_AEN_OFFLINE);
+                }
                 break;
 
         case BFA_FCS_ITNIM_SM_DELETE:
@@ -382,6 +388,33 @@ bfa_fcs_itnim_sm_initiator(struct bfa_fcs_itnim_s *itnim,
 }
 
 static void
+bfa_fcs_itnim_aen_post(struct bfa_fcs_itnim_s *itnim,
+                        enum bfa_itnim_aen_event event)
+{
+        struct bfa_fcs_rport_s *rport = itnim->rport;
+        struct bfad_s *bfad = (struct bfad_s *)itnim->fcs->bfad;
+        struct bfa_aen_entry_s  *aen_entry;
+
+        /* Don't post events for well known addresses */
+        if (BFA_FCS_PID_IS_WKA(rport->pid))
+                return;
+
+        bfad_get_aen_entry(bfad, aen_entry);
+        if (!aen_entry)
+                return;
+
+        aen_entry->aen_data.itnim.vf_id = rport->port->fabric->vf_id;
+        aen_entry->aen_data.itnim.ppwwn = bfa_fcs_lport_get_pwwn(
+                                        bfa_fcs_get_base_port(itnim->fcs));
+        aen_entry->aen_data.itnim.lpwwn = bfa_fcs_lport_get_pwwn(rport->port);
+        aen_entry->aen_data.itnim.rpwwn = rport->pwwn;
+
+        /* Send the AEN notification */
+        bfad_im_post_vendor_event(aen_entry, bfad, ++rport->fcs->fcs_aen_seq,
+                                  BFA_AEN_CAT_ITNIM, event);
+}
+
+static void
 bfa_fcs_itnim_send_prli(void *itnim_cbarg, struct bfa_fcxp_s *fcxp_alloced)
 {
         struct bfa_fcs_itnim_s *itnim = itnim_cbarg;