IB/mlx5: Add port_xmit_wait to counter registers read

Add port_xmit_wait to the error counters read by mlx5_ib_process_mad to
ensure sysfs port counter provides correct value for PortXmitWait.
Otherwise the sysfs port_xmit_wait file always contains zero.

The previous MAD_IFC implementation populated this counter, but it was
removed during the migration to PPCNT for error counters (32-bit only).

Signed-off-by: Tim Wright <tim@binbash.co.uk>
Signed-off-by: Doug Ledford <dledford@redhat.com>

2 files changed, 5 insertions, 1 deletions

diff --git a/drivers/infiniband/hw/mlx5/mad.c b/drivers/infiniband/hw/mlx5/mad.c
index 8dacb49eabd9..f1b56de64871 100644
--- a/drivers/infiniband/hw/mlx5/mad.c
+++ b/drivers/infiniband/hw/mlx5/mad.c
@@ -187,6 +187,8 @@ static void pma_cnt_assign(struct ib_pma_portcounters *pma_cnt,
                              port_xmit_discards);
         MLX5_ASSIGN_PMA_CNTR(pma_cnt->port_xmit_constraint_errors,
                              port_xmit_constraint_errors);
+        MLX5_ASSIGN_PMA_CNTR(pma_cnt->port_xmit_wait,
+                             port_xmit_wait);
         MLX5_ASSIGN_PMA_CNTR(pma_cnt->port_rcv_constraint_errors,
                              port_rcv_constraint_errors);
         MLX5_ASSIGN_PMA_CNTR(pma_cnt->link_overrun_errors,
diff --git a/include/linux/mlx5/mlx5_ifc.h b/include/linux/mlx5/mlx5_ifc.h
index 954f42c268a4..32de0724b400 100644
--- a/include/linux/mlx5/mlx5_ifc.h
+++ b/include/linux/mlx5/mlx5_ifc.h
@@ -1456,7 +1456,9 @@ struct mlx5_ifc_ib_port_cntrs_grp_data_layout_bits {
 
         u8         vl_15_dropped[0x10];
 
-        u8         reserved_at_a0[0xa0];
+        u8         reserved_at_a0[0x80];
+
+        u8         port_xmit_wait[0x20];
 };
 
 struct mlx5_ifc_eth_per_traffic_grp_data_layout_bits {