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>
diff --git a/drivers/infiniband/hw/mlx4/mad.c b/drivers/infiniband/hw/mlx4/mad.c
index 57ffa50..f36da99 100644
--- a/drivers/infiniband/hw/mlx4/mad.c
+++ b/drivers/infiniband/hw/mlx4/mad.c
@@ -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 @@
}
}
-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 @@
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)
{