RDMA/ocrdma: Query and initalize the PFC SL

This patch implements routine to query the PFC priority from the
adapter port.

Following are the changes implemented:

 * A new FW command is implemented to query the operational/admin DCBX
   configuration from the FW and obtain active priority(service
   level).
 * Adds support for the async event reported by FW when the PFC
   priority changes. Service level is re-initialized during modify_qp
   or create_ah, based on this event.
 * Maintain SL value in ocrdma_dev structure and refer that as and
   when needed.

Signed-off-by: Devesh Sharma <devesh.sharma@emulex.com>
Signed-off-by: Selvin Xavier <selvin.xavier@emulex.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>

1 files changed, 21 insertions, 0 deletions

diff --git a/drivers/infiniband/hw/ocrdma/ocrdma.h b/drivers/infiniband/hw/ocrdma/ocrdma.h
index 19011dbb930f..5cd65c244191 100644
--- a/drivers/infiniband/hw/ocrdma/ocrdma.h
+++ b/drivers/infiniband/hw/ocrdma/ocrdma.h
@@ -236,6 +236,9 @@ struct ocrdma_dev {
 	struct rcu_head rcu;
 	int id;
 	u64 stag_arr[OCRDMA_MAX_STAG];
+	u8 sl; /* service level */
+	bool pfc_state;
+	atomic_t update_sl;
 	u16 pvid;
 	u32 asic_id;
 
@@ -518,4 +521,22 @@ static inline u8 ocrdma_get_asic_type(struct ocrdma_dev *dev)
 				OCRDMA_SLI_ASIC_GEN_NUM_SHIFT;
 }
 
+static inline u8 ocrdma_get_pfc_prio(u8 *pfc, u8 prio)
+{
+	return *(pfc + prio);
+}
+
+static inline u8 ocrdma_get_app_prio(u8 *app_prio, u8 prio)
+{
+	return *(app_prio + prio);
+}
+
+static inline u8 ocrdma_is_enabled_and_synced(u32 state)
+{	/* May also be used to interpret TC-state, QCN-state
+	 * Appl-state and Logical-link-state in future.
+	 */
+	return (state & OCRDMA_STATE_FLAG_ENABLED) &&
+		(state & OCRDMA_STATE_FLAG_SYNC);
+}
+
 #endif