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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: Or Gerlitz <ogerlitz@mellanox.co.il>
Signed-off-by: Roland Dreier <roland@purestorage.com>
This commit is contained in:
Or Gerlitz 2011-06-15 14:51:27 +00:00 committed by Roland Dreier
parent cfcde11c3d
commit c37791349c
1 changed files with 67 additions and 1 deletions
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68
drivers/infiniband/hw/mlx4/mad.c
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@ -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)
{