Commit 474943c5 authored by Majd Dibbiny's avatar Majd Dibbiny Committed by Luis Henriques

IB/mlx4: Saturate RoCE port PMA counters in case of overflow

commit 61a3855b upstream.

For RoCE ports, we set the u32 PMA values based on u64 HCA counters. In case of
overflow, according to the IB spec, we have to saturate a counter to its
max value, do that.

Fixes: c3779134 ('IB/mlx4: Support PMA counters for IBoE')
Signed-off-by: default avatarMajd Dibbiny <majd@mellanox.com>
Signed-off-by: default avatarEran Ben Elisha <eranbe@mellanox.com>
Signed-off-by: default avatarHadar Hen Zion <hadarh@mellanox.com>
Signed-off-by: default avatarOr Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
Signed-off-by: default avatarLuis Henriques <luis.henriques@canonical.com>
parent 0dc78f85
......@@ -64,6 +64,14 @@ enum {
#define GUID_TBL_BLK_NUM_ENTRIES 8
#define GUID_TBL_BLK_SIZE (GUID_TBL_ENTRY_SIZE * GUID_TBL_BLK_NUM_ENTRIES)
/* Counters should be saturate once they reach their maximum value */
#define ASSIGN_32BIT_COUNTER(counter, value) do {\
if ((value) > U32_MAX) \
counter = cpu_to_be32(U32_MAX); \
else \
counter = cpu_to_be32(value); \
} while (0)
struct mlx4_mad_rcv_buf {
struct ib_grh grh;
u8 payload[256];
......@@ -806,10 +814,14 @@ static int ib_process_mad(struct ib_device *ibdev, int mad_flags, u8 port_num,
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));
ASSIGN_32BIT_COUNTER(pma_cnt->port_xmit_data,
(be64_to_cpu(cnt->tx_bytes) >> 2));
ASSIGN_32BIT_COUNTER(pma_cnt->port_rcv_data,
(be64_to_cpu(cnt->rx_bytes) >> 2));
ASSIGN_32BIT_COUNTER(pma_cnt->port_xmit_packets,
be64_to_cpu(cnt->tx_frames));
ASSIGN_32BIT_COUNTER(pma_cnt->port_rcv_packets,
be64_to_cpu(cnt->rx_frames));
}
static int iboe_process_mad(struct ib_device *ibdev, int mad_flags, u8 port_num,
......
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