[SCSI] bfa: add dynamic queue selection

Add new bfa functionality to support dynamic queue selection (IO redirection).
IO redirection can only be enabled when QoS is disabled.

Signed-off-by: Jing Huang <huangj@brocade.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>

1 files changed, 24 insertions, 0 deletions

diff --git a/drivers/scsi/bfa/bfa_fcpim.c b/drivers/scsi/bfa/bfa_fcpim.c
index 12849e9071c..8c703d8dc94 100644
--- a/drivers/scsi/bfa/bfa_fcpim.c
+++ b/drivers/scsi/bfa/bfa_fcpim.c
@@ -167,4 +167,28 @@ bfa_fcpim_qdepth_get(struct bfa_s *bfa)
 	return fcpim->q_depth;
 }
 
+void
+bfa_fcpim_update_ioredirect(struct bfa_s *bfa)
+{
+	bfa_boolean_t ioredirect;
+
+	/*
+	 * IO redirection is turned off when QoS is enabled and vice versa
+	 */
+	ioredirect = bfa_fcport_is_qos_enabled(bfa) ? BFA_FALSE : BFA_TRUE;
 
+	/*
+	 * Notify the bfad module of a possible state change in
+	 * IO redirection capability, due to a QoS state change. bfad will
+	 * check on the support for io redirection and update the
+	 * fcpim's ioredirect state accordingly.
+	 */
+	bfa_cb_ioredirect_state_change((void *)(bfa->bfad), ioredirect);
+}
+
+void
+bfa_fcpim_set_ioredirect(struct bfa_s *bfa, bfa_boolean_t state)
+{
+	struct bfa_fcpim_mod_s *fcpim = BFA_FCPIM_MOD(bfa);
+	fcpim->ioredirect = state;
+}