RDMA/mlx5: Support per-plane port IB counters by querying PPCNT register

Supports per-plane port counters by querying PPCNT register with the
"extended port counters" group, as the query_vport_counter command
doesn't support plane ports.

Signed-off-by: Mark Zhang <[email protected]>
Link: https://lore.kernel.org/r/06ffb582d67159b7def4654c8272d3d6e8bd2f2f.1718553901.git.leon@kernel.org
Signed-off-by: Leon Romanovsky <[email protected]>

Author: MarkZhang81

drivers/infiniband/hw/mlx5/mad.c

@@ -147,8 +147,39 @@ static void pma_cnt_assign(struct ib_pma_portcounters *pma_cnt,
 			     vl_15_dropped);
 }
 
-static int query_ib_ppcnt(struct mlx5_core_dev *dev, u8 port_num, void *out,
-			  size_t sz)
+static void pma_cnt_ext_assign_ppcnt(struct ib_pma_portcounters_ext *cnt_ext,
+				     void *out)
+{
+	void *out_pma = MLX5_ADDR_OF(ppcnt_reg, out,
+				     counter_set);
+
+#define MLX5_GET_EXT_CNTR(counter_name)			\
+	MLX5_GET64(ib_ext_port_cntrs_grp_data_layout,	\
+		   out_pma, counter_name##_high)
+
+	cnt_ext->port_xmit_data =
+		cpu_to_be64(MLX5_GET_EXT_CNTR(port_xmit_data) >> 2);
+	cnt_ext->port_rcv_data =
+		cpu_to_be64(MLX5_GET_EXT_CNTR(port_rcv_data) >> 2);
+
+	cnt_ext->port_xmit_packets =
+		cpu_to_be64(MLX5_GET_EXT_CNTR(port_xmit_pkts));
+	cnt_ext->port_rcv_packets =
+		cpu_to_be64(MLX5_GET_EXT_CNTR(port_rcv_pkts));
+
+	cnt_ext->port_unicast_xmit_packets =
+		cpu_to_be64(MLX5_GET_EXT_CNTR(port_unicast_xmit_pkts));
+	cnt_ext->port_unicast_rcv_packets =
+		cpu_to_be64(MLX5_GET_EXT_CNTR(port_unicast_rcv_pkts));
+
+	cnt_ext->port_multicast_xmit_packets =
+		cpu_to_be64(MLX5_GET_EXT_CNTR(port_multicast_xmit_pkts));
+	cnt_ext->port_multicast_rcv_packets =
+		cpu_to_be64(MLX5_GET_EXT_CNTR(port_multicast_rcv_pkts));
+}
+
+static int query_ib_ppcnt(struct mlx5_core_dev *dev, u8 port_num, u8 plane_num,
+			  void *out, size_t sz, bool ext)
 {
 	u32 *in;
 	int err;
@@ -160,8 +191,14 @@ static int query_ib_ppcnt(struct mlx5_core_dev *dev, u8 port_num, void *out,
 	}
 
 	MLX5_SET(ppcnt_reg, in, local_port, port_num);
-
-	MLX5_SET(ppcnt_reg, in, grp, MLX5_INFINIBAND_PORT_COUNTERS_GROUP);
+	MLX5_SET(ppcnt_reg, in, plane_ind, plane_num);
+
+	if (ext)
+		MLX5_SET(ppcnt_reg, in, grp,
+			 MLX5_INFINIBAND_EXTENDED_PORT_COUNTERS_GROUP);
+	else
+		MLX5_SET(ppcnt_reg, in, grp,
+			 MLX5_INFINIBAND_PORT_COUNTERS_GROUP);
 	err = mlx5_core_access_reg(dev, in, sz, out,
 				   sz, MLX5_REG_PPCNT, 0, 0);
 
@@ -189,7 +226,8 @@ static int process_pma_cmd(struct mlx5_ib_dev *dev, u32 port_num,
 		mdev_port_num = 1;
 	}
 	if (MLX5_CAP_GEN(dev->mdev, num_ports) == 1 &&
-	    !mlx5_core_mp_enabled(mdev)) {
+	    !mlx5_core_mp_enabled(mdev) &&
+	    dev->ib_dev.type != RDMA_DEVICE_TYPE_SMI) {
 		/* set local port to one for Function-Per-Port HCA. */
 		mdev = dev->mdev;
 		mdev_port_num = 1;
@@ -208,18 +246,27 @@ static int process_pma_cmd(struct mlx5_ib_dev *dev, u32 port_num,
 	if (in_mad->mad_hdr.attr_id == IB_PMA_PORT_COUNTERS_EXT) {
 		struct ib_pma_portcounters_ext *pma_cnt_ext =
 			(struct ib_pma_portcounters_ext *)(out_mad->data + 40);
-		int sz = MLX5_ST_SZ_BYTES(query_vport_counter_out);
+		int sz = max(MLX5_ST_SZ_BYTES(query_vport_counter_out),
+			     MLX5_ST_SZ_BYTES(ppcnt_reg));
 
 		out_cnt = kvzalloc(sz, GFP_KERNEL);
 		if (!out_cnt) {
 			err = IB_MAD_RESULT_FAILURE;
 			goto done;
 		}
 
-		err = mlx5_core_query_vport_counter(mdev, 0, 0, mdev_port_num,
-						    out_cnt);
-		if (!err)
-			pma_cnt_ext_assign(pma_cnt_ext, out_cnt);
+		if (dev->ib_dev.type == RDMA_DEVICE_TYPE_SMI) {
+			err = query_ib_ppcnt(mdev, mdev_port_num,
+					     port_num, out_cnt, sz, 1);
+			if (!err)
+				pma_cnt_ext_assign_ppcnt(pma_cnt_ext, out_cnt);
+		} else {
+			err = mlx5_core_query_vport_counter(mdev, 0, 0,
+							    mdev_port_num,
+							    out_cnt);
+			if (!err)
+				pma_cnt_ext_assign(pma_cnt_ext, out_cnt);
+		}
 	} else {
 		struct ib_pma_portcounters *pma_cnt =
 			(struct ib_pma_portcounters *)(out_mad->data + 40);
@@ -231,7 +278,7 @@ static int process_pma_cmd(struct mlx5_ib_dev *dev, u32 port_num,
 			goto done;
 		}
 
-		err = query_ib_ppcnt(mdev, mdev_port_num, out_cnt, sz);
+		err = query_ib_ppcnt(mdev, mdev_port_num, 0, out_cnt, sz, 0);
 		if (!err)
 			pma_cnt_assign(pma_cnt, out_cnt);
 	}

include/linux/mlx5/device.h

@@ -1466,6 +1466,7 @@ enum {
 	MLX5_PER_TRAFFIC_CLASS_CONGESTION_GROUP = 0x13,
 	MLX5_PHYSICAL_LAYER_STATISTICAL_GROUP = 0x16,
 	MLX5_INFINIBAND_PORT_COUNTERS_GROUP   = 0x20,
+	MLX5_INFINIBAND_EXTENDED_PORT_COUNTERS_GROUP = 0x21,
 };
 
 enum {