sfc: Add PM and RXDP drop counters to ethtool stats

Recognise the new Packet Memory and RX Data Path counters.

The following counters are added:
rx_pm_{trunc,discard}_bb_overflow - burst buffer overflowed.  This should not
 occur if BB correctly configured.
rx_pm_{trunc,discard}_vfifo_full - not enough space in packet memory.  May
 indicate RX performance problems.
rx_pm_{trunc,discard}_qbb - dropped by 802.1Qbb early discard mechanism.
 Since Qbb is not supported at present, this should not occur.
rx_pm_discard_mapping - 802.1p priority configured to be dropped.  This should
 not occur in normal operation.
rx_dp_q_disabled_packets - packet was to be delivered to a queue but queue is
 disabled.  May indicate misconfiguration by the driver.
rx_dp_di_dropped_packets - parser-dispatcher indicated that a packet should be
 dropped.
rx_dp_streaming_packets - packet was sent to the RXDP streaming bus, ie. a
 filter directed the packet to the MCPU.
rx_dp_emerg_{fetch,wait} - RX datapath had to wait for descriptors to be
 loaded.  Indicates performance problems but not drops.

These are only provided if the MC firmware has the
PM_AND_RXDP_COUNTERS capability.  Otherwise, mask them out.

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>

diff --git a/drivers/net/ethernet/sfc/ef10.c b/drivers/net/ethernet/sfc/ef10.c
index c00a5d6..21f9ad6 100644 (file)
--- a/drivers/net/ethernet/sfc/ef10.c
+++ b/drivers/net/ethernet/sfc/ef10.c
@@ -444,6 +444,18 @@ static const struct efx_hw_stat_desc efx_ef10_stat_desc[EF10_STAT_COUNT] = {
        EF10_DMA_STAT(rx_align_error, RX_ALIGN_ERROR_PKTS),
        EF10_DMA_STAT(rx_length_error, RX_LENGTH_ERROR_PKTS),
        EF10_DMA_STAT(rx_nodesc_drops, RX_NODESC_DROPS),
+       EF10_DMA_STAT(rx_pm_trunc_bb_overflow, PM_TRUNC_BB_OVERFLOW),
+       EF10_DMA_STAT(rx_pm_discard_bb_overflow, PM_DISCARD_BB_OVERFLOW),
+       EF10_DMA_STAT(rx_pm_trunc_vfifo_full, PM_TRUNC_VFIFO_FULL),
+       EF10_DMA_STAT(rx_pm_discard_vfifo_full, PM_DISCARD_VFIFO_FULL),
+       EF10_DMA_STAT(rx_pm_trunc_qbb, PM_TRUNC_QBB),
+       EF10_DMA_STAT(rx_pm_discard_qbb, PM_DISCARD_QBB),
+       EF10_DMA_STAT(rx_pm_discard_mapping, PM_DISCARD_MAPPING),
+       EF10_DMA_STAT(rx_dp_q_disabled_packets, RXDP_Q_DISABLED_PKTS),
+       EF10_DMA_STAT(rx_dp_di_dropped_packets, RXDP_DI_DROPPED_PKTS),
+       EF10_DMA_STAT(rx_dp_streaming_packets, RXDP_STREAMING_PKTS),
+       EF10_DMA_STAT(rx_dp_emerg_fetch, RXDP_EMERGENCY_FETCH_CONDITIONS),
+       EF10_DMA_STAT(rx_dp_emerg_wait, RXDP_EMERGENCY_WAIT_CONDITIONS),
 };
 
 #define HUNT_COMMON_STAT_MASK ((1ULL << EF10_STAT_tx_bytes) |          \
@@ -498,15 +510,38 @@ static const struct efx_hw_stat_desc efx_ef10_stat_desc[EF10_STAT_COUNT] = {
 #define HUNT_40G_EXTRA_STAT_MASK ((1ULL << EF10_STAT_rx_align_error) | \
                                  (1ULL << EF10_STAT_rx_length_error))
 
+/* These statistics are only provided if the firmware supports the
+ * capability PM_AND_RXDP_COUNTERS.
+ */
+#define HUNT_PM_AND_RXDP_STAT_MASK (                                   \
+       (1ULL << EF10_STAT_rx_pm_trunc_bb_overflow) |                   \
+       (1ULL << EF10_STAT_rx_pm_discard_bb_overflow) |                 \
+       (1ULL << EF10_STAT_rx_pm_trunc_vfifo_full) |                    \
+       (1ULL << EF10_STAT_rx_pm_discard_vfifo_full) |                  \
+       (1ULL << EF10_STAT_rx_pm_trunc_qbb) |                           \
+       (1ULL << EF10_STAT_rx_pm_discard_qbb) |                         \
+       (1ULL << EF10_STAT_rx_pm_discard_mapping) |                     \
+       (1ULL << EF10_STAT_rx_dp_q_disabled_packets) |                  \
+       (1ULL << EF10_STAT_rx_dp_di_dropped_packets) |                  \
+       (1ULL << EF10_STAT_rx_dp_streaming_packets) |                   \
+       (1ULL << EF10_STAT_rx_dp_emerg_fetch) |                         \
+       (1ULL << EF10_STAT_rx_dp_emerg_wait))
+
 static u64 efx_ef10_raw_stat_mask(struct efx_nic *efx)
 {
        u64 raw_mask = HUNT_COMMON_STAT_MASK;
        u32 port_caps = efx_mcdi_phy_get_caps(efx);
+       struct efx_ef10_nic_data *nic_data = efx->nic_data;
 
        if (port_caps & (1 << MC_CMD_PHY_CAP_40000FDX_LBN))
                raw_mask |= HUNT_40G_EXTRA_STAT_MASK;
        else
                raw_mask |= HUNT_10G_ONLY_STAT_MASK;
+
+       if (nic_data->datapath_caps &
+           (1 << MC_CMD_GET_CAPABILITIES_OUT_PM_AND_RXDP_COUNTERS_LBN))
+               raw_mask |= HUNT_PM_AND_RXDP_STAT_MASK;
+
        return raw_mask;
 }
 

diff --git a/drivers/net/ethernet/sfc/nic.h b/drivers/net/ethernet/sfc/nic.h
index fda29d3..890bbbe 100644 (file)
--- a/drivers/net/ethernet/sfc/nic.h
+++ b/drivers/net/ethernet/sfc/nic.h
@@ -386,6 +386,18 @@ enum {
        EF10_STAT_rx_align_error,
        EF10_STAT_rx_length_error,
        EF10_STAT_rx_nodesc_drops,
+       EF10_STAT_rx_pm_trunc_bb_overflow,
+       EF10_STAT_rx_pm_discard_bb_overflow,
+       EF10_STAT_rx_pm_trunc_vfifo_full,
+       EF10_STAT_rx_pm_discard_vfifo_full,
+       EF10_STAT_rx_pm_trunc_qbb,
+       EF10_STAT_rx_pm_discard_qbb,
+       EF10_STAT_rx_pm_discard_mapping,
+       EF10_STAT_rx_dp_q_disabled_packets,
+       EF10_STAT_rx_dp_di_dropped_packets,
+       EF10_STAT_rx_dp_streaming_packets,
+       EF10_STAT_rx_dp_emerg_fetch,
+       EF10_STAT_rx_dp_emerg_wait,
        EF10_STAT_COUNT
 };