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Commit c3779134 authored by Or Gerlitz's avatar Or Gerlitz Committed by Roland Dreier
Browse files

IB/mlx4: Support PMA counters for IBoE 



Use the per port counter attached to all QPs created on that port to
implement port level packets/bytes performance counters a la IB.
Derived from a patch by Eli Cohen <eli@mellanox.co.il>

Signed-off-by: default avatarOr Gerlitz <ogerlitz@mellanox.co.il>
Signed-off-by: default avatarRoland Dreier <roland@purestorage.com>
parent cfcde11c

drivers/infiniband/hw/mlx4/mad.c

+67 −1
Original line number Diff line number Diff line
@@ -35,6 +35,7 @@ 


#include <linux/mlx4/cmd.h>

#include <linux/gfp.h>

#include <rdma/ib_pma.h>



#include "mlx4_ib.h"
@@ -232,7 +233,7 @@ static void forward_trap(struct mlx4_ib_dev *dev, u8 port_num, struct ib_mad *ma 
	}

}



int mlx4_ib_process_mad(struct ib_device *ibdev, int mad_flags,	u8 port_num,

static int ib_process_mad(struct ib_device *ibdev, int mad_flags, u8 port_num,

			struct ib_wc *in_wc, struct ib_grh *in_grh,

			struct ib_mad *in_mad, struct ib_mad *out_mad)

{
@@ -302,6 +303,71 @@ int mlx4_ib_process_mad(struct ib_device *ibdev, int mad_flags, u8 port_num, 
	return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_REPLY;

}



static void edit_counter(struct mlx4_counter *cnt,

					struct ib_pma_portcounters *pma_cnt)

{

	pma_cnt->port_xmit_data = cpu_to_be32((be64_to_cpu(cnt->tx_bytes)>>2));

	pma_cnt->port_rcv_data  = cpu_to_be32((be64_to_cpu(cnt->rx_bytes)>>2));

	pma_cnt->port_xmit_packets = cpu_to_be32(be64_to_cpu(cnt->tx_frames));

	pma_cnt->port_rcv_packets  = cpu_to_be32(be64_to_cpu(cnt->rx_frames));

}



static int iboe_process_mad(struct ib_device *ibdev, int mad_flags, u8 port_num,

			struct ib_wc *in_wc, struct ib_grh *in_grh,

			struct ib_mad *in_mad, struct ib_mad *out_mad)

{

	struct mlx4_cmd_mailbox *mailbox;

	struct mlx4_ib_dev *dev = to_mdev(ibdev);

	int err;

	u32 inmod = dev->counters[port_num - 1] & 0xffff;

	u8 mode;



	if (in_mad->mad_hdr.mgmt_class != IB_MGMT_CLASS_PERF_MGMT)

		return -EINVAL;



	mailbox = mlx4_alloc_cmd_mailbox(dev->dev);

	if (IS_ERR(mailbox))

		return IB_MAD_RESULT_FAILURE;



	err = mlx4_cmd_box(dev->dev, 0, mailbox->dma, inmod, 0,

			   MLX4_CMD_QUERY_IF_STAT, MLX4_CMD_TIME_CLASS_C);

	if (err)

		err = IB_MAD_RESULT_FAILURE;

	else {

		memset(out_mad->data, 0, sizeof out_mad->data);

		mode = ((struct mlx4_counter *)mailbox->buf)->counter_mode;

		switch (mode & 0xf) {

		case 0:

			edit_counter(mailbox->buf,

						(void *)(out_mad->data + 40));

			err = IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_REPLY;

			break;

		default:

			err = IB_MAD_RESULT_FAILURE;

		}

	}



	mlx4_free_cmd_mailbox(dev->dev, mailbox);



	return err;

}



int mlx4_ib_process_mad(struct ib_device *ibdev, int mad_flags, u8 port_num,

			struct ib_wc *in_wc, struct ib_grh *in_grh,

			struct ib_mad *in_mad, struct ib_mad *out_mad)

{

	switch (rdma_port_get_link_layer(ibdev, port_num)) {

	case IB_LINK_LAYER_INFINIBAND:

		return ib_process_mad(ibdev, mad_flags, port_num, in_wc,

				      in_grh, in_mad, out_mad);

	case IB_LINK_LAYER_ETHERNET:

		return iboe_process_mad(ibdev, mad_flags, port_num, in_wc,

					  in_grh, in_mad, out_mad);

	default:

		return -EINVAL;

	}

}



static void send_handler(struct ib_mad_agent *agent,

			 struct ib_mad_send_wc *mad_send_wc)

{