From 4eb7f20bcf0614fef744af88a2ba3c1c8bfcf189 Mon Sep 17 00:00:00 2001 From: Mohsin Bashir Date: Mon, 2 Sep 2024 10:39:07 -0700 Subject: [PATCH] eth: fbnic: Add support to fetch group stats Add support for group stats for mac. The fbnic_set_counter help preserve the default values for counters which are not touched by the driver. The 'reset' flag in 'get_eth_mac_stats' allows to choose between resetting the counter to recent most value or fetching the aggregated values of the counter. The 'fbnic_stat_rd64' read 64b stats counters in an atomic fashion using read-read-read approach. This allows to isolate cases where counter is moving too fast making accuracy of the counter questionable. Command: ethtool -S eth0 --groups eth-mac Example Output: eth-mac-FramesTransmittedOK: 421644 eth-mac-FramesReceivedOK: 3849708 eth-mac-FrameCheckSequenceErrors: 0 eth-mac-AlignmentErrors: 0 eth-mac-OctetsTransmittedOK: 64799060 eth-mac-FramesLostDueToIntMACXmitError: 0 eth-mac-OctetsReceivedOK: 5134513531 eth-mac-FramesLostDueToIntMACRcvError: 0 eth-mac-MulticastFramesXmittedOK: 568 eth-mac-BroadcastFramesXmittedOK: 454 eth-mac-MulticastFramesReceivedOK: 276106 eth-mac-BroadcastFramesReceivedOK: 26119 eth-mac-FrameTooLongErrors: 0 Signed-off-by: Mohsin Bashir Reviewed-by: Simon Horman Signed-off-by: David S. Miller --- drivers/net/ethernet/meta/fbnic/Makefile | 1 + drivers/net/ethernet/meta/fbnic/fbnic.h | 4 ++ drivers/net/ethernet/meta/fbnic/fbnic_csr.h | 37 ++++++++++++++ .../net/ethernet/meta/fbnic/fbnic_ethtool.c | 49 ++++++++++++++++++ .../net/ethernet/meta/fbnic/fbnic_hw_stats.c | 27 ++++++++++ .../net/ethernet/meta/fbnic/fbnic_hw_stats.h | 40 +++++++++++++++ drivers/net/ethernet/meta/fbnic/fbnic_mac.c | 50 +++++++++++++++++++ drivers/net/ethernet/meta/fbnic/fbnic_mac.h | 3 ++ 8 files changed, 211 insertions(+) create mode 100644 drivers/net/ethernet/meta/fbnic/fbnic_hw_stats.c create mode 100644 drivers/net/ethernet/meta/fbnic/fbnic_hw_stats.h diff --git a/drivers/net/ethernet/meta/fbnic/Makefile b/drivers/net/ethernet/meta/fbnic/Makefile index 37cfc34a5118f..ed4533a73c575 100644 --- a/drivers/net/ethernet/meta/fbnic/Makefile +++ b/drivers/net/ethernet/meta/fbnic/Makefile @@ -10,6 +10,7 @@ obj-$(CONFIG_FBNIC) += fbnic.o fbnic-y := fbnic_devlink.o \ fbnic_ethtool.o \ fbnic_fw.o \ + fbnic_hw_stats.o \ fbnic_irq.o \ fbnic_mac.o \ fbnic_netdev.o \ diff --git a/drivers/net/ethernet/meta/fbnic/fbnic.h b/drivers/net/ethernet/meta/fbnic/fbnic.h index 28d970f81bfc9..0f9e8d79461c6 100644 --- a/drivers/net/ethernet/meta/fbnic/fbnic.h +++ b/drivers/net/ethernet/meta/fbnic/fbnic.h @@ -11,6 +11,7 @@ #include "fbnic_csr.h" #include "fbnic_fw.h" +#include "fbnic_hw_stats.h" #include "fbnic_mac.h" #include "fbnic_rpc.h" @@ -47,6 +48,9 @@ struct fbnic_dev { /* Number of TCQs/RCQs available on hardware */ u16 max_num_queues; + + /* Local copy of hardware statistics */ + struct fbnic_hw_stats hw_stats; }; /* Reserve entry 0 in the MSI-X "others" array until we have filled all diff --git a/drivers/net/ethernet/meta/fbnic/fbnic_csr.h b/drivers/net/ethernet/meta/fbnic/fbnic_csr.h index a64360de05527..21db509acbc15 100644 --- a/drivers/net/ethernet/meta/fbnic/fbnic_csr.h +++ b/drivers/net/ethernet/meta/fbnic/fbnic_csr.h @@ -660,6 +660,43 @@ enum { #define FBNIC_SIG_PCS_INTR_MASK 0x11816 /* 0x46058 */ #define FBNIC_CSR_END_SIG 0x1184e /* CSR section delimiter */ +#define FBNIC_CSR_START_MAC_STAT 0x11a00 +#define FBNIC_MAC_STAT_RX_BYTE_COUNT_L 0x11a08 /* 0x46820 */ +#define FBNIC_MAC_STAT_RX_BYTE_COUNT_H 0x11a09 /* 0x46824 */ +#define FBNIC_MAC_STAT_RX_ALIGN_ERROR_L \ + 0x11a0a /* 0x46828 */ +#define FBNIC_MAC_STAT_RX_ALIGN_ERROR_H \ + 0x11a0b /* 0x4682c */ +#define FBNIC_MAC_STAT_RX_TOOLONG_L 0x11a0e /* 0x46838 */ +#define FBNIC_MAC_STAT_RX_TOOLONG_H 0x11a0f /* 0x4683c */ +#define FBNIC_MAC_STAT_RX_RECEIVED_OK_L \ + 0x11a12 /* 0x46848 */ +#define FBNIC_MAC_STAT_RX_RECEIVED_OK_H \ + 0x11a13 /* 0x4684c */ +#define FBNIC_MAC_STAT_RX_PACKET_BAD_FCS_L \ + 0x11a14 /* 0x46850 */ +#define FBNIC_MAC_STAT_RX_PACKET_BAD_FCS_H \ + 0x11a15 /* 0x46854 */ +#define FBNIC_MAC_STAT_RX_IFINERRORS_L 0x11a18 /* 0x46860 */ +#define FBNIC_MAC_STAT_RX_IFINERRORS_H 0x11a19 /* 0x46864 */ +#define FBNIC_MAC_STAT_RX_MULTICAST_L 0x11a1c /* 0x46870 */ +#define FBNIC_MAC_STAT_RX_MULTICAST_H 0x11a1d /* 0x46874 */ +#define FBNIC_MAC_STAT_RX_BROADCAST_L 0x11a1e /* 0x46878 */ +#define FBNIC_MAC_STAT_RX_BROADCAST_H 0x11a1f /* 0x4687c */ +#define FBNIC_MAC_STAT_TX_BYTE_COUNT_L 0x11a3e /* 0x468f8 */ +#define FBNIC_MAC_STAT_TX_BYTE_COUNT_H 0x11a3f /* 0x468fc */ +#define FBNIC_MAC_STAT_TX_TRANSMITTED_OK_L \ + 0x11a42 /* 0x46908 */ +#define FBNIC_MAC_STAT_TX_TRANSMITTED_OK_H \ + 0x11a43 /* 0x4690c */ +#define FBNIC_MAC_STAT_TX_IFOUTERRORS_L \ + 0x11a46 /* 0x46918 */ +#define FBNIC_MAC_STAT_TX_IFOUTERRORS_H \ + 0x11a47 /* 0x4691c */ +#define FBNIC_MAC_STAT_TX_MULTICAST_L 0x11a4a /* 0x46928 */ +#define FBNIC_MAC_STAT_TX_MULTICAST_H 0x11a4b /* 0x4692c */ +#define FBNIC_MAC_STAT_TX_BROADCAST_L 0x11a4c /* 0x46930 */ +#define FBNIC_MAC_STAT_TX_BROADCAST_H 0x11a4d /* 0x46934 */ /* PUL User Registers */ #define FBNIC_CSR_START_PUL_USER 0x31000 /* CSR section delimiter */ #define FBNIC_PUL_OB_TLP_HDR_AW_CFG 0x3103d /* 0xc40f4 */ diff --git a/drivers/net/ethernet/meta/fbnic/fbnic_ethtool.c b/drivers/net/ethernet/meta/fbnic/fbnic_ethtool.c index 7064dfc9f5b03..5d980e1789414 100644 --- a/drivers/net/ethernet/meta/fbnic/fbnic_ethtool.c +++ b/drivers/net/ethernet/meta/fbnic/fbnic_ethtool.c @@ -16,8 +16,57 @@ fbnic_get_drvinfo(struct net_device *netdev, struct ethtool_drvinfo *drvinfo) sizeof(drvinfo->fw_version)); } +static void fbnic_set_counter(u64 *stat, struct fbnic_stat_counter *counter) +{ + if (counter->reported) + *stat = counter->value; +} + +static void +fbnic_get_eth_mac_stats(struct net_device *netdev, + struct ethtool_eth_mac_stats *eth_mac_stats) +{ + struct fbnic_net *fbn = netdev_priv(netdev); + struct fbnic_mac_stats *mac_stats; + struct fbnic_dev *fbd = fbn->fbd; + const struct fbnic_mac *mac; + + mac_stats = &fbd->hw_stats.mac; + mac = fbd->mac; + + mac->get_eth_mac_stats(fbd, false, &mac_stats->eth_mac); + + fbnic_set_counter(ð_mac_stats->FramesTransmittedOK, + &mac_stats->eth_mac.FramesTransmittedOK); + fbnic_set_counter(ð_mac_stats->FramesReceivedOK, + &mac_stats->eth_mac.FramesReceivedOK); + fbnic_set_counter(ð_mac_stats->FrameCheckSequenceErrors, + &mac_stats->eth_mac.FrameCheckSequenceErrors); + fbnic_set_counter(ð_mac_stats->AlignmentErrors, + &mac_stats->eth_mac.AlignmentErrors); + fbnic_set_counter(ð_mac_stats->OctetsTransmittedOK, + &mac_stats->eth_mac.OctetsTransmittedOK); + fbnic_set_counter(ð_mac_stats->FramesLostDueToIntMACXmitError, + &mac_stats->eth_mac.FramesLostDueToIntMACXmitError); + fbnic_set_counter(ð_mac_stats->OctetsReceivedOK, + &mac_stats->eth_mac.OctetsReceivedOK); + fbnic_set_counter(ð_mac_stats->FramesLostDueToIntMACRcvError, + &mac_stats->eth_mac.FramesLostDueToIntMACRcvError); + fbnic_set_counter(ð_mac_stats->MulticastFramesXmittedOK, + &mac_stats->eth_mac.MulticastFramesXmittedOK); + fbnic_set_counter(ð_mac_stats->BroadcastFramesXmittedOK, + &mac_stats->eth_mac.BroadcastFramesXmittedOK); + fbnic_set_counter(ð_mac_stats->MulticastFramesReceivedOK, + &mac_stats->eth_mac.MulticastFramesReceivedOK); + fbnic_set_counter(ð_mac_stats->BroadcastFramesReceivedOK, + &mac_stats->eth_mac.BroadcastFramesReceivedOK); + fbnic_set_counter(ð_mac_stats->FrameTooLongErrors, + &mac_stats->eth_mac.FrameTooLongErrors); +} + static const struct ethtool_ops fbnic_ethtool_ops = { .get_drvinfo = fbnic_get_drvinfo, + .get_eth_mac_stats = fbnic_get_eth_mac_stats, }; void fbnic_set_ethtool_ops(struct net_device *dev) diff --git a/drivers/net/ethernet/meta/fbnic/fbnic_hw_stats.c b/drivers/net/ethernet/meta/fbnic/fbnic_hw_stats.c new file mode 100644 index 0000000000000..a0acc7606aa1a --- /dev/null +++ b/drivers/net/ethernet/meta/fbnic/fbnic_hw_stats.c @@ -0,0 +1,27 @@ +#include "fbnic.h" + +u64 fbnic_stat_rd64(struct fbnic_dev *fbd, u32 reg, u32 offset) +{ + u32 prev_upper, upper, lower, diff; + + prev_upper = rd32(fbd, reg + offset); + lower = rd32(fbd, reg); + upper = rd32(fbd, reg + offset); + + diff = upper - prev_upper; + if (!diff) + return ((u64)upper << 32) | lower; + + if (diff > 1) + dev_warn_once(fbd->dev, + "Stats inconsistent, upper 32b of %#010x updating too quickly\n", + reg * 4); + + /* Return only the upper bits as we cannot guarantee + * the accuracy of the lower bits. We will add them in + * when the counter slows down enough that we can get + * a snapshot with both upper values being the same + * between reads. + */ + return ((u64)upper << 32); +} diff --git a/drivers/net/ethernet/meta/fbnic/fbnic_hw_stats.h b/drivers/net/ethernet/meta/fbnic/fbnic_hw_stats.h new file mode 100644 index 0000000000000..30348904b5107 --- /dev/null +++ b/drivers/net/ethernet/meta/fbnic/fbnic_hw_stats.h @@ -0,0 +1,40 @@ +#include + +#include "fbnic_csr.h" + +struct fbnic_stat_counter { + u64 value; + union { + u32 old_reg_value_32; + u64 old_reg_value_64; + } u; + bool reported; +}; + +struct fbnic_eth_mac_stats { + struct fbnic_stat_counter FramesTransmittedOK; + struct fbnic_stat_counter FramesReceivedOK; + struct fbnic_stat_counter FrameCheckSequenceErrors; + struct fbnic_stat_counter AlignmentErrors; + struct fbnic_stat_counter OctetsTransmittedOK; + struct fbnic_stat_counter FramesLostDueToIntMACXmitError; + struct fbnic_stat_counter OctetsReceivedOK; + struct fbnic_stat_counter FramesLostDueToIntMACRcvError; + struct fbnic_stat_counter MulticastFramesXmittedOK; + struct fbnic_stat_counter BroadcastFramesXmittedOK; + struct fbnic_stat_counter MulticastFramesReceivedOK; + struct fbnic_stat_counter BroadcastFramesReceivedOK; + struct fbnic_stat_counter FrameTooLongErrors; +}; + +struct fbnic_mac_stats { + struct fbnic_eth_mac_stats eth_mac; +}; + +struct fbnic_hw_stats { + struct fbnic_mac_stats mac; +}; + +u64 fbnic_stat_rd64(struct fbnic_dev *fbd, u32 reg, u32 offset); + +void fbnic_get_hw_stats(struct fbnic_dev *fbd); diff --git a/drivers/net/ethernet/meta/fbnic/fbnic_mac.c b/drivers/net/ethernet/meta/fbnic/fbnic_mac.c index 7920e7af82d9c..7b654d0a6dac6 100644 --- a/drivers/net/ethernet/meta/fbnic/fbnic_mac.c +++ b/drivers/net/ethernet/meta/fbnic/fbnic_mac.c @@ -403,6 +403,21 @@ static void fbnic_mac_init_regs(struct fbnic_dev *fbd) fbnic_mac_init_txb(fbd); } +static void __fbnic_mac_stat_rd64(struct fbnic_dev *fbd, bool reset, u32 reg, + struct fbnic_stat_counter *stat) +{ + u64 new_reg_value; + + new_reg_value = fbnic_stat_rd64(fbd, reg, 1); + if (!reset) + stat->value += new_reg_value - stat->u.old_reg_value_64; + stat->u.old_reg_value_64 = new_reg_value; + stat->reported = true; +} + +#define fbnic_mac_stat_rd64(fbd, reset, __stat, __CSR) \ + __fbnic_mac_stat_rd64(fbd, reset, FBNIC_##__CSR##_L, &(__stat)) + static void fbnic_mac_tx_pause_config(struct fbnic_dev *fbd, bool tx_pause) { u32 rxb_pause_ctrl; @@ -637,12 +652,47 @@ static void fbnic_mac_link_up_asic(struct fbnic_dev *fbd, wr32(fbd, FBNIC_MAC_COMMAND_CONFIG, cmd_cfg); } +static void +fbnic_mac_get_eth_mac_stats(struct fbnic_dev *fbd, bool reset, + struct fbnic_eth_mac_stats *mac_stats) +{ + fbnic_mac_stat_rd64(fbd, reset, mac_stats->OctetsReceivedOK, + MAC_STAT_RX_BYTE_COUNT); + fbnic_mac_stat_rd64(fbd, reset, mac_stats->AlignmentErrors, + MAC_STAT_RX_ALIGN_ERROR); + fbnic_mac_stat_rd64(fbd, reset, mac_stats->FrameTooLongErrors, + MAC_STAT_RX_TOOLONG); + fbnic_mac_stat_rd64(fbd, reset, mac_stats->FramesReceivedOK, + MAC_STAT_RX_RECEIVED_OK); + fbnic_mac_stat_rd64(fbd, reset, mac_stats->FrameCheckSequenceErrors, + MAC_STAT_RX_PACKET_BAD_FCS); + fbnic_mac_stat_rd64(fbd, reset, + mac_stats->FramesLostDueToIntMACRcvError, + MAC_STAT_RX_IFINERRORS); + fbnic_mac_stat_rd64(fbd, reset, mac_stats->MulticastFramesReceivedOK, + MAC_STAT_RX_MULTICAST); + fbnic_mac_stat_rd64(fbd, reset, mac_stats->BroadcastFramesReceivedOK, + MAC_STAT_RX_BROADCAST); + fbnic_mac_stat_rd64(fbd, reset, mac_stats->OctetsTransmittedOK, + MAC_STAT_TX_BYTE_COUNT); + fbnic_mac_stat_rd64(fbd, reset, mac_stats->FramesTransmittedOK, + MAC_STAT_TX_TRANSMITTED_OK); + fbnic_mac_stat_rd64(fbd, reset, + mac_stats->FramesLostDueToIntMACXmitError, + MAC_STAT_TX_IFOUTERRORS); + fbnic_mac_stat_rd64(fbd, reset, mac_stats->MulticastFramesXmittedOK, + MAC_STAT_TX_MULTICAST); + fbnic_mac_stat_rd64(fbd, reset, mac_stats->BroadcastFramesXmittedOK, + MAC_STAT_TX_BROADCAST); +} + static const struct fbnic_mac fbnic_mac_asic = { .init_regs = fbnic_mac_init_regs, .pcs_enable = fbnic_pcs_enable_asic, .pcs_disable = fbnic_pcs_disable_asic, .pcs_get_link = fbnic_pcs_get_link_asic, .pcs_get_link_event = fbnic_pcs_get_link_event_asic, + .get_eth_mac_stats = fbnic_mac_get_eth_mac_stats, .link_down = fbnic_mac_link_down_asic, .link_up = fbnic_mac_link_up_asic, }; diff --git a/drivers/net/ethernet/meta/fbnic/fbnic_mac.h b/drivers/net/ethernet/meta/fbnic/fbnic_mac.h index f53be6e6aef9d..476239a9d381e 100644 --- a/drivers/net/ethernet/meta/fbnic/fbnic_mac.h +++ b/drivers/net/ethernet/meta/fbnic/fbnic_mac.h @@ -78,6 +78,9 @@ struct fbnic_mac { bool (*pcs_get_link)(struct fbnic_dev *fbd); int (*pcs_get_link_event)(struct fbnic_dev *fbd); + void (*get_eth_mac_stats)(struct fbnic_dev *fbd, bool reset, + struct fbnic_eth_mac_stats *mac_stats); + void (*link_down)(struct fbnic_dev *fbd); void (*link_up)(struct fbnic_dev *fbd, bool tx_pause, bool rx_pause); };