[SCSI] bfa: Add diagnostic port (D-Port) support

- Introduced support for D-Port which is a new port mode during which
  link level diagnostics can be run.
- Provided mechanism to dynamically configure D-Port and initiate diagnostic
  tests to isolate any link level issues.
- In D-Port mode, the HBA port does not participate in fabric or login to the
  remote device or run data traffic.
- Diagnostic tests include running various loopback tests in conjunction with
  the attached device.

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

1 files changed, 56 insertions, 0 deletions

diff --git a/drivers/scsi/bfa/bfad_bsg.c b/drivers/scsi/bfa/bfad_bsg.c
index 8ddd7e8be977..69b1ba9e58f6 100644
--- a/drivers/scsi/bfa/bfad_bsg.c
+++ b/drivers/scsi/bfa/bfad_bsg.c
@@ -1747,6 +1747,52 @@ bfad_iocmd_diag_lb_stat(struct bfad_s *bfad, void *cmd)
 }
 
 int
+bfad_iocmd_diag_cfg_dport(struct bfad_s *bfad, unsigned int cmd, void *pcmd)
+{
+        struct bfa_bsg_gen_s *iocmd = (struct bfa_bsg_gen_s *)pcmd;
+        unsigned long   flags;
+        struct bfad_hal_comp fcomp;
+
+        init_completion(&fcomp.comp);
+        spin_lock_irqsave(&bfad->bfad_lock, flags);
+        if (cmd == IOCMD_DIAG_DPORT_ENABLE)
+                iocmd->status = bfa_dport_enable(&bfad->bfa,
+                                        bfad_hcb_comp, &fcomp);
+        else if (cmd == IOCMD_DIAG_DPORT_DISABLE)
+                iocmd->status = bfa_dport_disable(&bfad->bfa,
+                                        bfad_hcb_comp, &fcomp);
+        else {
+                bfa_trc(bfad, 0);
+                spin_unlock_irqrestore(&bfad->bfad_lock, flags);
+                return -EINVAL;
+        }
+        spin_unlock_irqrestore(&bfad->bfad_lock, flags);
+
+        if (iocmd->status != BFA_STATUS_OK)
+                bfa_trc(bfad, iocmd->status);
+        else {
+                wait_for_completion(&fcomp.comp);
+                iocmd->status = fcomp.status;
+        }
+
+        return 0;
+}
+
+int
+bfad_iocmd_diag_dport_get_state(struct bfad_s *bfad, void *pcmd)
+{
+        struct bfa_bsg_diag_dport_get_state_s *iocmd =
+                        (struct bfa_bsg_diag_dport_get_state_s *)pcmd;
+        unsigned long   flags;
+
+        spin_lock_irqsave(&bfad->bfad_lock, flags);
+        iocmd->status = bfa_dport_get_state(&bfad->bfa, &iocmd->state);
+        spin_unlock_irqrestore(&bfad->bfad_lock, flags);
+
+        return 0;
+}
+
+int
 bfad_iocmd_phy_get_attr(struct bfad_s *bfad, void *cmd)
 {
         struct bfa_bsg_phy_attr_s *iocmd =
@@ -2172,6 +2218,9 @@ bfad_iocmd_cfg_trunk(struct bfad_s *bfad, void *cmd, unsigned int v_cmd)
 
         spin_lock_irqsave(&bfad->bfad_lock, flags);
 
+        if (bfa_fcport_is_dport(&bfad->bfa))
+                return BFA_STATUS_DPORT_ERR;
+
         if ((fcport->cfg.topology == BFA_PORT_TOPOLOGY_LOOP) ||
                 (fcport->topology == BFA_PORT_TOPOLOGY_LOOP))
                 iocmd->status = BFA_STATUS_TOPOLOGY_LOOP;
@@ -2702,6 +2751,13 @@ bfad_iocmd_handler(struct bfad_s *bfad, unsigned int cmd, void *iocmd,
         case IOCMD_DIAG_LB_STAT:
                 rc = bfad_iocmd_diag_lb_stat(bfad, iocmd);
                 break;
+        case IOCMD_DIAG_DPORT_ENABLE:
+        case IOCMD_DIAG_DPORT_DISABLE:
+                rc = bfad_iocmd_diag_cfg_dport(bfad, cmd, iocmd);
+                break;
+        case IOCMD_DIAG_DPORT_GET_STATE:
+                rc = bfad_iocmd_diag_dport_get_state(bfad, iocmd);
+                break;
         case IOCMD_PHY_GET_ATTR:
                 rc = bfad_iocmd_phy_get_attr(bfad, iocmd);
                 break;