From be65bfc957eb70aecdf3e351ec9fc3f067598f9e Mon Sep 17 00:00:00 2001 From: Vadim Fedorenko Date: Tue, 8 Oct 2024 11:14:32 -0700 Subject: [PATCH 1/5] eth: fbnic: add software TX timestamping support Add software TX timestamping support. RX software timestamping is implemented in the core and there is no need to provide special flag in the driver anymore. Signed-off-by: Vadim Fedorenko Signed-off-by: Paolo Abeni --- drivers/net/ethernet/meta/fbnic/fbnic_ethtool.c | 11 +++++++++++ drivers/net/ethernet/meta/fbnic/fbnic_txrx.c | 3 +++ 2 files changed, 14 insertions(+) diff --git a/drivers/net/ethernet/meta/fbnic/fbnic_ethtool.c b/drivers/net/ethernet/meta/fbnic/fbnic_ethtool.c index 5d980e1789414..ffc773014e0fd 100644 --- a/drivers/net/ethernet/meta/fbnic/fbnic_ethtool.c +++ b/drivers/net/ethernet/meta/fbnic/fbnic_ethtool.c @@ -6,6 +6,16 @@ #include "fbnic_netdev.h" #include "fbnic_tlv.h" +static int +fbnic_get_ts_info(struct net_device *netdev, + struct kernel_ethtool_ts_info *tsinfo) +{ + tsinfo->so_timestamping = + SOF_TIMESTAMPING_TX_SOFTWARE; + + return 0; +} + static void fbnic_get_drvinfo(struct net_device *netdev, struct ethtool_drvinfo *drvinfo) { @@ -66,6 +76,7 @@ fbnic_get_eth_mac_stats(struct net_device *netdev, static const struct ethtool_ops fbnic_ethtool_ops = { .get_drvinfo = fbnic_get_drvinfo, + .get_ts_info = fbnic_get_ts_info, .get_eth_mac_stats = fbnic_get_eth_mac_stats, }; diff --git a/drivers/net/ethernet/meta/fbnic/fbnic_txrx.c b/drivers/net/ethernet/meta/fbnic/fbnic_txrx.c index 6a6d7e22f1a72..8337d49bad0bb 100644 --- a/drivers/net/ethernet/meta/fbnic/fbnic_txrx.c +++ b/drivers/net/ethernet/meta/fbnic/fbnic_txrx.c @@ -205,6 +205,9 @@ fbnic_tx_map(struct fbnic_ring *ring, struct sk_buff *skb, __le64 *meta) ring->tail = tail; + /* Record SW timestamp */ + skb_tx_timestamp(skb); + /* Verify there is room for another packet */ fbnic_maybe_stop_tx(skb->dev, ring, FBNIC_MAX_SKB_DESC); From ad8e66a4d963ce3936eb6dc92c3be41ee92f3350 Mon Sep 17 00:00:00 2001 From: Vadim Fedorenko Date: Tue, 8 Oct 2024 11:14:33 -0700 Subject: [PATCH 2/5] eth: fbnic: add initial PHC support Create PHC device and provide callbacks needed for ptp_clock device. Signed-off-by: Vadim Fedorenko Signed-off-by: Paolo Abeni --- drivers/net/ethernet/meta/fbnic/Makefile | 3 +- drivers/net/ethernet/meta/fbnic/fbnic.h | 11 + drivers/net/ethernet/meta/fbnic/fbnic_csr.h | 38 +++ .../net/ethernet/meta/fbnic/fbnic_netdev.c | 11 +- .../net/ethernet/meta/fbnic/fbnic_netdev.h | 15 + drivers/net/ethernet/meta/fbnic/fbnic_pci.c | 9 +- drivers/net/ethernet/meta/fbnic/fbnic_time.c | 303 ++++++++++++++++++ 7 files changed, 386 insertions(+), 4 deletions(-) create mode 100644 drivers/net/ethernet/meta/fbnic/fbnic_time.c diff --git a/drivers/net/ethernet/meta/fbnic/Makefile b/drivers/net/ethernet/meta/fbnic/Makefile index ed4533a73c575..8615d516a274b 100644 --- a/drivers/net/ethernet/meta/fbnic/Makefile +++ b/drivers/net/ethernet/meta/fbnic/Makefile @@ -18,4 +18,5 @@ fbnic-y := fbnic_devlink.o \ fbnic_phylink.o \ fbnic_rpc.o \ fbnic_tlv.o \ - fbnic_txrx.o + fbnic_txrx.o \ + fbnic_time.o diff --git a/drivers/net/ethernet/meta/fbnic/fbnic.h b/drivers/net/ethernet/meta/fbnic/fbnic.h index 0f9e8d79461c6..ca59261f01558 100644 --- a/drivers/net/ethernet/meta/fbnic/fbnic.h +++ b/drivers/net/ethernet/meta/fbnic/fbnic.h @@ -6,6 +6,7 @@ #include #include +#include #include #include @@ -49,6 +50,16 @@ struct fbnic_dev { /* Number of TCQs/RCQs available on hardware */ u16 max_num_queues; + /* Lock protecting writes to @time_high, @time_offset of fbnic_netdev, + * and the HW time CSR machinery. + */ + spinlock_t time_lock; + /* Externally accessible PTP clock, may be NULL */ + struct ptp_clock *ptp; + struct ptp_clock_info ptp_info; + /* Last @time_high refresh time in jiffies (to catch stalls) */ + unsigned long last_read; + /* Local copy of hardware statistics */ struct fbnic_hw_stats hw_stats; }; diff --git a/drivers/net/ethernet/meta/fbnic/fbnic_csr.h b/drivers/net/ethernet/meta/fbnic/fbnic_csr.h index 21db509acbc15..290b924b77493 100644 --- a/drivers/net/ethernet/meta/fbnic/fbnic_csr.h +++ b/drivers/net/ethernet/meta/fbnic/fbnic_csr.h @@ -413,6 +413,44 @@ enum { #define FBNIC_TMI_DROP_CTRL 0x04401 /* 0x11004 */ #define FBNIC_TMI_DROP_CTRL_EN CSR_BIT(0) #define FBNIC_CSR_END_TMI 0x0443f /* CSR section delimiter */ + +/* Precision Time Protocol Registers */ +#define FBNIC_CSR_START_PTP 0x04800 /* CSR section delimiter */ +#define FBNIC_PTP_REG_BASE 0x04800 /* 0x12000 */ + +#define FBNIC_PTP_CTRL 0x04800 /* 0x12000 */ +#define FBNIC_PTP_CTRL_EN CSR_BIT(0) +#define FBNIC_PTP_CTRL_MONO_EN CSR_BIT(4) +#define FBNIC_PTP_CTRL_TQS_OUT_EN CSR_BIT(8) +#define FBNIC_PTP_CTRL_MAC_OUT_IVAL CSR_GENMASK(16, 12) +#define FBNIC_PTP_CTRL_TICK_IVAL CSR_GENMASK(23, 20) + +#define FBNIC_PTP_ADJUST 0x04801 /* 0x12004 */ +#define FBNIC_PTP_ADJUST_INIT CSR_BIT(0) +#define FBNIC_PTP_ADJUST_SUB_NUDGE CSR_BIT(8) +#define FBNIC_PTP_ADJUST_ADD_NUDGE CSR_BIT(16) +#define FBNIC_PTP_ADJUST_ADDEND_SET CSR_BIT(24) + +#define FBNIC_PTP_INIT_HI 0x04802 /* 0x12008 */ +#define FBNIC_PTP_INIT_LO 0x04803 /* 0x1200c */ + +#define FBNIC_PTP_NUDGE_NS 0x04804 /* 0x12010 */ +#define FBNIC_PTP_NUDGE_SUBNS 0x04805 /* 0x12014 */ + +#define FBNIC_PTP_ADD_VAL_NS 0x04806 /* 0x12018 */ +#define FBNIC_PTP_ADD_VAL_NS_MASK CSR_GENMASK(15, 0) +#define FBNIC_PTP_ADD_VAL_SUBNS 0x04807 /* 0x1201c */ + +#define FBNIC_PTP_CTR_VAL_HI 0x04808 /* 0x12020 */ +#define FBNIC_PTP_CTR_VAL_LO 0x04809 /* 0x12024 */ + +#define FBNIC_PTP_MONO_PTP_CTR_HI 0x0480a /* 0x12028 */ +#define FBNIC_PTP_MONO_PTP_CTR_LO 0x0480b /* 0x1202c */ + +#define FBNIC_PTP_CDC_FIFO_STATUS 0x0480c /* 0x12030 */ +#define FBNIC_PTP_SPARE 0x0480d /* 0x12034 */ +#define FBNIC_CSR_END_PTP 0x0480d /* CSR section delimiter */ + /* Rx Buffer Registers */ #define FBNIC_CSR_START_RXB 0x08000 /* CSR section delimiter */ enum { diff --git a/drivers/net/ethernet/meta/fbnic/fbnic_netdev.c b/drivers/net/ethernet/meta/fbnic/fbnic_netdev.c index a400616a24d41..6e6d8988db54e 100644 --- a/drivers/net/ethernet/meta/fbnic/fbnic_netdev.c +++ b/drivers/net/ethernet/meta/fbnic/fbnic_netdev.c @@ -42,18 +42,24 @@ int __fbnic_open(struct fbnic_net *fbn) goto free_resources; } - err = fbnic_fw_init_heartbeat(fbd, false); + err = fbnic_time_start(fbn); if (err) goto release_ownership; + err = fbnic_fw_init_heartbeat(fbd, false); + if (err) + goto time_stop; + err = fbnic_pcs_irq_enable(fbd); if (err) - goto release_ownership; + goto time_stop; /* Pull the BMC config and initialize the RPC */ fbnic_bmc_rpc_init(fbd); fbnic_rss_reinit(fbd, fbn); return 0; +time_stop: + fbnic_time_stop(fbn); release_ownership: fbnic_fw_xmit_ownership_msg(fbn->fbd, false); free_resources: @@ -82,6 +88,7 @@ static int fbnic_stop(struct net_device *netdev) fbnic_down(fbn); fbnic_pcs_irq_disable(fbn->fbd); + fbnic_time_stop(fbn); fbnic_fw_xmit_ownership_msg(fbn->fbd, false); fbnic_free_resources(fbn); diff --git a/drivers/net/ethernet/meta/fbnic/fbnic_netdev.h b/drivers/net/ethernet/meta/fbnic/fbnic_netdev.h index 6c27da09a6122..f530e3235634f 100644 --- a/drivers/net/ethernet/meta/fbnic/fbnic_netdev.h +++ b/drivers/net/ethernet/meta/fbnic/fbnic_netdev.h @@ -33,6 +33,15 @@ struct fbnic_net { u8 fec; u8 link_mode; + /* Cached top bits of the HW time counter for 40b -> 64b conversion */ + u32 time_high; + /* Protect readers of @time_offset, writers take @time_lock. */ + struct u64_stats_sync time_seq; + /* Offset in ns between free running NIC PHC and time set via PTP + * clock callbacks + */ + s64 time_offset; + u16 num_tx_queues; u16 num_rx_queues; @@ -60,6 +69,12 @@ void fbnic_reset_queues(struct fbnic_net *fbn, unsigned int tx, unsigned int rx); void fbnic_set_ethtool_ops(struct net_device *dev); +int fbnic_ptp_setup(struct fbnic_dev *fbd); +void fbnic_ptp_destroy(struct fbnic_dev *fbd); +void fbnic_time_init(struct fbnic_net *fbn); +int fbnic_time_start(struct fbnic_net *fbn); +void fbnic_time_stop(struct fbnic_net *fbn); + void __fbnic_set_rx_mode(struct net_device *netdev); void fbnic_clear_rx_mode(struct net_device *netdev); diff --git a/drivers/net/ethernet/meta/fbnic/fbnic_pci.c b/drivers/net/ethernet/meta/fbnic/fbnic_pci.c index a4809fe0fc249..32e5b4cc55bd4 100644 --- a/drivers/net/ethernet/meta/fbnic/fbnic_pci.c +++ b/drivers/net/ethernet/meta/fbnic/fbnic_pci.c @@ -300,14 +300,20 @@ static int fbnic_probe(struct pci_dev *pdev, const struct pci_device_id *ent) goto init_failure_mode; } + err = fbnic_ptp_setup(fbd); + if (err) + goto ifm_free_netdev; + err = fbnic_netdev_register(netdev); if (err) { dev_err(&pdev->dev, "Netdev registration failed: %d\n", err); - goto ifm_free_netdev; + goto ifm_destroy_ptp; } return 0; +ifm_destroy_ptp: + fbnic_ptp_destroy(fbd); ifm_free_netdev: fbnic_netdev_free(fbd); init_failure_mode: @@ -342,6 +348,7 @@ static void fbnic_remove(struct pci_dev *pdev) fbnic_netdev_unregister(netdev); cancel_delayed_work_sync(&fbd->service_task); + fbnic_ptp_destroy(fbd); fbnic_netdev_free(fbd); } diff --git a/drivers/net/ethernet/meta/fbnic/fbnic_time.c b/drivers/net/ethernet/meta/fbnic/fbnic_time.c new file mode 100644 index 0000000000000..39d99677b71ea --- /dev/null +++ b/drivers/net/ethernet/meta/fbnic/fbnic_time.c @@ -0,0 +1,303 @@ +// SPDX-License-Identifier: GPL-2.0 +/* Copyright (c) Meta Platforms, Inc. and affiliates. */ + +#include +#include +#include +#include +#include + +#include "fbnic.h" +#include "fbnic_csr.h" +#include "fbnic_netdev.h" + +/* FBNIC timing & PTP implementation + * Datapath uses truncated 40b timestamps for scheduling and event reporting. + * We need to promote those to full 64b, hence we periodically cache the top + * 32bit of the HW time counter. Since this makes our time reporting non-atomic + * we leave the HW clock free running and adjust time offsets in SW as needed. + * Time offset is 64bit - we need a seq counter for 32bit machines. + * Time offset and the cache of top bits are independent so we don't need + * a coherent snapshot of both - READ_ONCE()/WRITE_ONCE() + writer side lock + * are enough. + */ + +/* Period of refresh of top bits of timestamp, give ourselves a 8x margin. + * This should translate to once a minute. + * The use of nsecs_to_jiffies() should be safe for a <=40b nsec value. + */ +#define FBNIC_TS_HIGH_REFRESH_JIF nsecs_to_jiffies((1ULL << 40) / 16) + +static struct fbnic_dev *fbnic_from_ptp_info(struct ptp_clock_info *ptp) +{ + return container_of(ptp, struct fbnic_dev, ptp_info); +} + +/* This function is "slow" because we could try guessing which high part + * is correct based on low instead of re-reading, and skip reading @hi + * twice altogether if @lo is far enough from 0. + */ +static u64 __fbnic_time_get_slow(struct fbnic_dev *fbd) +{ + u32 hi, lo; + + lockdep_assert_held(&fbd->time_lock); + + do { + hi = fbnic_rd32(fbd, FBNIC_PTP_CTR_VAL_HI); + lo = fbnic_rd32(fbd, FBNIC_PTP_CTR_VAL_LO); + } while (hi != fbnic_rd32(fbd, FBNIC_PTP_CTR_VAL_HI)); + + return (u64)hi << 32 | lo; +} + +static void __fbnic_time_set_addend(struct fbnic_dev *fbd, u64 addend) +{ + lockdep_assert_held(&fbd->time_lock); + + fbnic_wr32(fbd, FBNIC_PTP_ADD_VAL_NS, + FIELD_PREP(FBNIC_PTP_ADD_VAL_NS_MASK, addend >> 32)); + fbnic_wr32(fbd, FBNIC_PTP_ADD_VAL_SUBNS, (u32)addend); +} + +static void fbnic_ptp_fresh_check(struct fbnic_dev *fbd) +{ + if (time_is_after_jiffies(fbd->last_read + + FBNIC_TS_HIGH_REFRESH_JIF * 3 / 2)) + return; + + dev_warn(fbd->dev, "NIC timestamp refresh stall, delayed by %lu sec\n", + (jiffies - fbd->last_read - FBNIC_TS_HIGH_REFRESH_JIF) / HZ); +} + +static void fbnic_ptp_refresh_time(struct fbnic_dev *fbd, struct fbnic_net *fbn) +{ + unsigned long flags; + u32 hi; + + spin_lock_irqsave(&fbd->time_lock, flags); + hi = fbnic_rd32(fbn->fbd, FBNIC_PTP_CTR_VAL_HI); + if (!fbnic_present(fbd)) + goto out; /* Don't bother handling, reset is pending */ + /* Let's keep high cached value a bit lower to avoid race with + * incoming timestamps. The logic in fbnic_ts40_to_ns() will + * take care of overflow in this case. It will make cached time + * ~1 minute lower and incoming timestamp will always be later + * then cached time. + */ + WRITE_ONCE(fbn->time_high, hi - 16); + fbd->last_read = jiffies; + out: + spin_unlock_irqrestore(&fbd->time_lock, flags); +} + +static long fbnic_ptp_do_aux_work(struct ptp_clock_info *ptp) +{ + struct fbnic_dev *fbd = fbnic_from_ptp_info(ptp); + struct fbnic_net *fbn; + + fbn = netdev_priv(fbd->netdev); + + fbnic_ptp_fresh_check(fbd); + fbnic_ptp_refresh_time(fbd, fbn); + + return FBNIC_TS_HIGH_REFRESH_JIF; +} + +static int fbnic_ptp_adjfine(struct ptp_clock_info *ptp, long scaled_ppm) +{ + struct fbnic_dev *fbd = fbnic_from_ptp_info(ptp); + u64 addend, dclk_period; + unsigned long flags; + + /* d_clock is 600 MHz; which in Q16.32 fixed point ns is: */ + dclk_period = (((u64)1000000000) << 32) / FBNIC_CLOCK_FREQ; + addend = adjust_by_scaled_ppm(dclk_period, scaled_ppm); + + spin_lock_irqsave(&fbd->time_lock, flags); + __fbnic_time_set_addend(fbd, addend); + fbnic_wr32(fbd, FBNIC_PTP_ADJUST, FBNIC_PTP_ADJUST_ADDEND_SET); + + /* Flush, make sure FBNIC_PTP_ADD_VAL_* is stable for at least 4 clks */ + fbnic_rd32(fbd, FBNIC_PTP_SPARE); + spin_unlock_irqrestore(&fbd->time_lock, flags); + + return fbnic_present(fbd) ? 0 : -EIO; +} + +static int fbnic_ptp_adjtime(struct ptp_clock_info *ptp, s64 delta) +{ + struct fbnic_dev *fbd = fbnic_from_ptp_info(ptp); + struct fbnic_net *fbn; + unsigned long flags; + + fbn = netdev_priv(fbd->netdev); + + spin_lock_irqsave(&fbd->time_lock, flags); + u64_stats_update_begin(&fbn->time_seq); + WRITE_ONCE(fbn->time_offset, READ_ONCE(fbn->time_offset) + delta); + u64_stats_update_end(&fbn->time_seq); + spin_unlock_irqrestore(&fbd->time_lock, flags); + + return 0; +} + +static int +fbnic_ptp_gettimex64(struct ptp_clock_info *ptp, struct timespec64 *ts, + struct ptp_system_timestamp *sts) +{ + struct fbnic_dev *fbd = fbnic_from_ptp_info(ptp); + struct fbnic_net *fbn; + unsigned long flags; + u64 time_ns; + u32 hi, lo; + + fbn = netdev_priv(fbd->netdev); + + spin_lock_irqsave(&fbd->time_lock, flags); + + do { + hi = fbnic_rd32(fbd, FBNIC_PTP_CTR_VAL_HI); + ptp_read_system_prets(sts); + lo = fbnic_rd32(fbd, FBNIC_PTP_CTR_VAL_LO); + ptp_read_system_postts(sts); + /* Similarly to comment above __fbnic_time_get_slow() + * - this can be optimized if needed. + */ + } while (hi != fbnic_rd32(fbd, FBNIC_PTP_CTR_VAL_HI)); + + time_ns = ((u64)hi << 32 | lo) + fbn->time_offset; + spin_unlock_irqrestore(&fbd->time_lock, flags); + + if (!fbnic_present(fbd)) + return -EIO; + + *ts = ns_to_timespec64(time_ns); + + return 0; +} + +static int +fbnic_ptp_settime64(struct ptp_clock_info *ptp, const struct timespec64 *ts) +{ + struct fbnic_dev *fbd = fbnic_from_ptp_info(ptp); + struct fbnic_net *fbn; + unsigned long flags; + u64 dev_ns, host_ns; + int ret; + + fbn = netdev_priv(fbd->netdev); + + host_ns = timespec64_to_ns(ts); + + spin_lock_irqsave(&fbd->time_lock, flags); + + dev_ns = __fbnic_time_get_slow(fbd); + + if (fbnic_present(fbd)) { + u64_stats_update_begin(&fbn->time_seq); + WRITE_ONCE(fbn->time_offset, host_ns - dev_ns); + u64_stats_update_end(&fbn->time_seq); + ret = 0; + } else { + ret = -EIO; + } + spin_unlock_irqrestore(&fbd->time_lock, flags); + + return ret; +} + +static const struct ptp_clock_info fbnic_ptp_info = { + .owner = THIS_MODULE, + /* 1,000,000,000 - 1 PPB to ensure increment is positive + * after max negative adjustment. + */ + .max_adj = 999999999, + .do_aux_work = fbnic_ptp_do_aux_work, + .adjfine = fbnic_ptp_adjfine, + .adjtime = fbnic_ptp_adjtime, + .gettimex64 = fbnic_ptp_gettimex64, + .settime64 = fbnic_ptp_settime64, +}; + +static void fbnic_ptp_reset(struct fbnic_dev *fbd) +{ + struct fbnic_net *fbn = netdev_priv(fbd->netdev); + u64 dclk_period; + + fbnic_wr32(fbd, FBNIC_PTP_CTRL, + FBNIC_PTP_CTRL_EN | + FIELD_PREP(FBNIC_PTP_CTRL_TICK_IVAL, 1)); + + /* d_clock is 600 MHz; which in Q16.32 fixed point ns is: */ + dclk_period = (((u64)1000000000) << 32) / FBNIC_CLOCK_FREQ; + + __fbnic_time_set_addend(fbd, dclk_period); + + fbnic_wr32(fbd, FBNIC_PTP_INIT_HI, 0); + fbnic_wr32(fbd, FBNIC_PTP_INIT_LO, 0); + + fbnic_wr32(fbd, FBNIC_PTP_ADJUST, FBNIC_PTP_ADJUST_INIT); + + fbnic_wr32(fbd, FBNIC_PTP_CTRL, + FBNIC_PTP_CTRL_EN | + FBNIC_PTP_CTRL_TQS_OUT_EN | + FIELD_PREP(FBNIC_PTP_CTRL_MAC_OUT_IVAL, 3) | + FIELD_PREP(FBNIC_PTP_CTRL_TICK_IVAL, 1)); + + fbnic_rd32(fbd, FBNIC_PTP_SPARE); + + fbn->time_offset = 0; + fbn->time_high = 0; +} + +void fbnic_time_init(struct fbnic_net *fbn) +{ + /* This is not really a statistic, but the lockng primitive fits + * our usecase perfectly, we need an atomic 8 bytes READ_ONCE() / + * WRITE_ONCE() behavior. + */ + u64_stats_init(&fbn->time_seq); +} + +int fbnic_time_start(struct fbnic_net *fbn) +{ + fbnic_ptp_refresh_time(fbn->fbd, fbn); + /* Assume that fbnic_ptp_do_aux_work() will never be called if not + * scheduled here + */ + return ptp_schedule_worker(fbn->fbd->ptp, FBNIC_TS_HIGH_REFRESH_JIF); +} + +void fbnic_time_stop(struct fbnic_net *fbn) +{ + ptp_cancel_worker_sync(fbn->fbd->ptp); + fbnic_ptp_fresh_check(fbn->fbd); +} + +int fbnic_ptp_setup(struct fbnic_dev *fbd) +{ + struct device *dev = fbd->dev; + unsigned long flags; + + spin_lock_init(&fbd->time_lock); + + spin_lock_irqsave(&fbd->time_lock, flags); /* Appease lockdep */ + fbnic_ptp_reset(fbd); + spin_unlock_irqrestore(&fbd->time_lock, flags); + + memcpy(&fbd->ptp_info, &fbnic_ptp_info, sizeof(fbnic_ptp_info)); + + fbd->ptp = ptp_clock_register(&fbd->ptp_info, dev); + if (IS_ERR(fbd->ptp)) + dev_err(dev, "Failed to register PTP: %pe\n", fbd->ptp); + + return PTR_ERR_OR_ZERO(fbd->ptp); +} + +void fbnic_ptp_destroy(struct fbnic_dev *fbd) +{ + if (!fbd->ptp) + return; + ptp_clock_unregister(fbd->ptp); +} From 6a2b3ede954343c47dbfbffe6136383ffd0d5632 Mon Sep 17 00:00:00 2001 From: Vadim Fedorenko Date: Tue, 8 Oct 2024 11:14:34 -0700 Subject: [PATCH 3/5] eth: fbnic: add RX packets timestamping support Add callbacks to support timestamping configuration via ethtool. Add processing of RX timestamps. Signed-off-by: Vadim Fedorenko Signed-off-by: Paolo Abeni --- drivers/net/ethernet/meta/fbnic/fbnic_csr.h | 1 + .../net/ethernet/meta/fbnic/fbnic_ethtool.c | 16 +++- .../net/ethernet/meta/fbnic/fbnic_netdev.c | 80 +++++++++++++++++++ .../net/ethernet/meta/fbnic/fbnic_netdev.h | 3 + drivers/net/ethernet/meta/fbnic/fbnic_rpc.c | 31 +++++++ drivers/net/ethernet/meta/fbnic/fbnic_txrx.c | 63 +++++++++++++++ drivers/net/ethernet/meta/fbnic/fbnic_txrx.h | 1 + 7 files changed, 194 insertions(+), 1 deletion(-) diff --git a/drivers/net/ethernet/meta/fbnic/fbnic_csr.h b/drivers/net/ethernet/meta/fbnic/fbnic_csr.h index 290b924b77493..79cdd231d3271 100644 --- a/drivers/net/ethernet/meta/fbnic/fbnic_csr.h +++ b/drivers/net/ethernet/meta/fbnic/fbnic_csr.h @@ -586,6 +586,7 @@ enum { }; #define FBNIC_RPC_ACT_TBL0_DMA_HINT CSR_GENMASK(24, 16) +#define FBNIC_RPC_ACT_TBL0_TS_ENA CSR_BIT(28) #define FBNIC_RPC_ACT_TBL0_RSS_CTXT_ID CSR_BIT(30) #define FBNIC_RPC_ACT_TBL1_DEFAULT 0x0840b /* 0x2102c */ diff --git a/drivers/net/ethernet/meta/fbnic/fbnic_ethtool.c b/drivers/net/ethernet/meta/fbnic/fbnic_ethtool.c index ffc773014e0fd..3afb7227574a7 100644 --- a/drivers/net/ethernet/meta/fbnic/fbnic_ethtool.c +++ b/drivers/net/ethernet/meta/fbnic/fbnic_ethtool.c @@ -10,8 +10,22 @@ static int fbnic_get_ts_info(struct net_device *netdev, struct kernel_ethtool_ts_info *tsinfo) { + struct fbnic_net *fbn = netdev_priv(netdev); + + tsinfo->phc_index = ptp_clock_index(fbn->fbd->ptp); + tsinfo->so_timestamping = - SOF_TIMESTAMPING_TX_SOFTWARE; + SOF_TIMESTAMPING_TX_SOFTWARE | + SOF_TIMESTAMPING_RX_HARDWARE | + SOF_TIMESTAMPING_RAW_HARDWARE; + + tsinfo->rx_filters = + BIT(HWTSTAMP_FILTER_NONE) | + BIT(HWTSTAMP_FILTER_PTP_V1_L4_EVENT) | + BIT(HWTSTAMP_FILTER_PTP_V2_L4_EVENT) | + BIT(HWTSTAMP_FILTER_PTP_V2_L2_EVENT) | + BIT(HWTSTAMP_FILTER_PTP_V2_EVENT) | + BIT(HWTSTAMP_FILTER_ALL); return 0; } diff --git a/drivers/net/ethernet/meta/fbnic/fbnic_netdev.c b/drivers/net/ethernet/meta/fbnic/fbnic_netdev.c index 6e6d8988db54e..c08798fad2034 100644 --- a/drivers/net/ethernet/meta/fbnic/fbnic_netdev.c +++ b/drivers/net/ethernet/meta/fbnic/fbnic_netdev.c @@ -324,6 +324,84 @@ void fbnic_clear_rx_mode(struct net_device *netdev) __dev_mc_unsync(netdev, NULL); } +static int fbnic_hwtstamp_get(struct net_device *netdev, + struct kernel_hwtstamp_config *config) +{ + struct fbnic_net *fbn = netdev_priv(netdev); + + *config = fbn->hwtstamp_config; + + return 0; +} + +static int fbnic_hwtstamp_set(struct net_device *netdev, + struct kernel_hwtstamp_config *config, + struct netlink_ext_ack *extack) +{ + struct fbnic_net *fbn = netdev_priv(netdev); + int old_rx_filter; + + if (config->source != HWTSTAMP_SOURCE_NETDEV) + return -EOPNOTSUPP; + + if (!kernel_hwtstamp_config_changed(config, &fbn->hwtstamp_config)) + return 0; + + /* Upscale the filters */ + switch (config->rx_filter) { + case HWTSTAMP_FILTER_NONE: + case HWTSTAMP_FILTER_ALL: + case HWTSTAMP_FILTER_PTP_V1_L4_EVENT: + case HWTSTAMP_FILTER_PTP_V2_L4_EVENT: + case HWTSTAMP_FILTER_PTP_V2_L2_EVENT: + case HWTSTAMP_FILTER_PTP_V2_EVENT: + break; + case HWTSTAMP_FILTER_NTP_ALL: + config->rx_filter = HWTSTAMP_FILTER_ALL; + break; + case HWTSTAMP_FILTER_PTP_V1_L4_SYNC: + case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ: + config->rx_filter = HWTSTAMP_FILTER_PTP_V1_L4_EVENT; + break; + case HWTSTAMP_FILTER_PTP_V2_L4_SYNC: + case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ: + config->rx_filter = HWTSTAMP_FILTER_PTP_V2_L4_EVENT; + break; + case HWTSTAMP_FILTER_PTP_V2_L2_SYNC: + case HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ: + config->rx_filter = HWTSTAMP_FILTER_PTP_V2_L2_EVENT; + break; + case HWTSTAMP_FILTER_PTP_V2_SYNC: + case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ: + config->rx_filter = HWTSTAMP_FILTER_PTP_V2_EVENT; + break; + default: + return -ERANGE; + } + + /* Configure */ + old_rx_filter = fbn->hwtstamp_config.rx_filter; + memcpy(&fbn->hwtstamp_config, config, sizeof(*config)); + + if (old_rx_filter != config->rx_filter && netif_running(fbn->netdev)) { + fbnic_rss_reinit(fbn->fbd, fbn); + fbnic_write_rules(fbn->fbd); + } + + /* Save / report back filter configuration + * Note that our filter configuration is inexact. Instead of + * filtering for a specific UDP port or L2 Ethertype we are + * filtering in all UDP or all non-IP packets for timestamping. So + * if anything other than FILTER_ALL is requested we report + * FILTER_SOME indicating that we will be timestamping a few + * additional packets. + */ + if (config->rx_filter > HWTSTAMP_FILTER_ALL) + config->rx_filter = HWTSTAMP_FILTER_SOME; + + return 0; +} + static void fbnic_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats64) { @@ -401,6 +479,8 @@ static const struct net_device_ops fbnic_netdev_ops = { .ndo_set_mac_address = fbnic_set_mac, .ndo_set_rx_mode = fbnic_set_rx_mode, .ndo_get_stats64 = fbnic_get_stats64, + .ndo_hwtstamp_get = fbnic_hwtstamp_get, + .ndo_hwtstamp_set = fbnic_hwtstamp_set, }; static void fbnic_get_queue_stats_rx(struct net_device *dev, int idx, diff --git a/drivers/net/ethernet/meta/fbnic/fbnic_netdev.h b/drivers/net/ethernet/meta/fbnic/fbnic_netdev.h index f530e3235634f..b8417b3007788 100644 --- a/drivers/net/ethernet/meta/fbnic/fbnic_netdev.h +++ b/drivers/net/ethernet/meta/fbnic/fbnic_netdev.h @@ -54,6 +54,9 @@ struct fbnic_net { struct fbnic_queue_stats rx_stats; u64 link_down_events; + /* Time stampinn filter config */ + struct kernel_hwtstamp_config hwtstamp_config; + struct list_head napis; }; diff --git a/drivers/net/ethernet/meta/fbnic/fbnic_rpc.c b/drivers/net/ethernet/meta/fbnic/fbnic_rpc.c index c8aa29fc052b5..337b8b3aef2f0 100644 --- a/drivers/net/ethernet/meta/fbnic/fbnic_rpc.c +++ b/drivers/net/ethernet/meta/fbnic/fbnic_rpc.c @@ -244,6 +244,12 @@ void fbnic_bmc_rpc_init(struct fbnic_dev *fbd) ((_ip) ? FBNIC_RPC_TCAM_ACT1_IP_VALID : 0) | \ ((_v6) ? FBNIC_RPC_TCAM_ACT1_IP_IS_V6 : 0)) +#define FBNIC_TSTAMP_MASK(_all, _udp, _ether) \ + (((_all) ? ((1u << FBNIC_NUM_HASH_OPT) - 1) : 0) | \ + ((_udp) ? (1u << FBNIC_UDP6_HASH_OPT) | \ + (1u << FBNIC_UDP4_HASH_OPT) : 0) | \ + ((_ether) ? (1u << FBNIC_ETHER_HASH_OPT) : 0)) + void fbnic_rss_reinit(struct fbnic_dev *fbd, struct fbnic_net *fbn) { static const u32 act1_value[FBNIC_NUM_HASH_OPT] = { @@ -255,6 +261,7 @@ void fbnic_rss_reinit(struct fbnic_dev *fbd, struct fbnic_net *fbn) FBNIC_ACT1_INIT(0, 0, 1, 0), /* IP4 */ 0 /* Ether */ }; + u32 tstamp_mask = 0; unsigned int i; /* To support scenarios where a BMC is present we must write the @@ -264,6 +271,28 @@ void fbnic_rss_reinit(struct fbnic_dev *fbd, struct fbnic_net *fbn) BUILD_BUG_ON(FBNIC_RSS_EN_NUM_UNICAST * 2 != FBNIC_RSS_EN_NUM_ENTRIES); BUILD_BUG_ON(ARRAY_SIZE(act1_value) != FBNIC_NUM_HASH_OPT); + /* Set timestamp mask with 1b per flow type */ + if (fbn->hwtstamp_config.rx_filter != HWTSTAMP_FILTER_NONE) { + switch (fbn->hwtstamp_config.rx_filter) { + case HWTSTAMP_FILTER_ALL: + tstamp_mask = FBNIC_TSTAMP_MASK(1, 1, 1); + break; + case HWTSTAMP_FILTER_PTP_V2_EVENT: + tstamp_mask = FBNIC_TSTAMP_MASK(0, 1, 1); + break; + case HWTSTAMP_FILTER_PTP_V1_L4_EVENT: + case HWTSTAMP_FILTER_PTP_V2_L4_EVENT: + tstamp_mask = FBNIC_TSTAMP_MASK(0, 1, 0); + break; + case HWTSTAMP_FILTER_PTP_V2_L2_EVENT: + tstamp_mask = FBNIC_TSTAMP_MASK(0, 0, 1); + break; + default: + netdev_warn(fbn->netdev, "Unsupported hwtstamp_rx_filter\n"); + break; + } + } + /* Program RSS hash enable mask for host in action TCAM/table. */ for (i = fbnic_bmc_present(fbd) ? 0 : FBNIC_RSS_EN_NUM_UNICAST; i < FBNIC_RSS_EN_NUM_ENTRIES; i++) { @@ -287,6 +316,8 @@ void fbnic_rss_reinit(struct fbnic_dev *fbd, struct fbnic_net *fbn) if (!dest) dest = FBNIC_RPC_ACT_TBL0_DROP; + else if (tstamp_mask & (1u << flow_type)) + dest |= FBNIC_RPC_ACT_TBL0_TS_ENA; if (act1_value[flow_type] & FBNIC_RPC_TCAM_ACT1_L4_VALID) dest |= FIELD_PREP(FBNIC_RPC_ACT_TBL0_DMA_HINT, diff --git a/drivers/net/ethernet/meta/fbnic/fbnic_txrx.c b/drivers/net/ethernet/meta/fbnic/fbnic_txrx.c index 8337d49bad0bb..cbf7a6c6331a3 100644 --- a/drivers/net/ethernet/meta/fbnic/fbnic_txrx.c +++ b/drivers/net/ethernet/meta/fbnic/fbnic_txrx.c @@ -43,6 +43,46 @@ static void fbnic_ring_wr32(struct fbnic_ring *ring, unsigned int csr, u32 val) writel(val, csr_base + csr); } +/** + * fbnic_ts40_to_ns() - convert descriptor timestamp to PHC time + * @fbn: netdev priv of the FB NIC + * @ts40: timestamp read from a descriptor + * + * Return: u64 value of PHC time in nanoseconds + * + * Convert truncated 40 bit device timestamp as read from a descriptor + * to the full PHC time in nanoseconds. + */ +static __maybe_unused u64 fbnic_ts40_to_ns(struct fbnic_net *fbn, u64 ts40) +{ + unsigned int s; + u64 time_ns; + s64 offset; + u8 ts_top; + u32 high; + + do { + s = u64_stats_fetch_begin(&fbn->time_seq); + offset = READ_ONCE(fbn->time_offset); + } while (u64_stats_fetch_retry(&fbn->time_seq, s)); + + high = READ_ONCE(fbn->time_high); + + /* Bits 63..40 from periodic clock reads, 39..0 from ts40 */ + time_ns = (u64)(high >> 8) << 40 | ts40; + + /* Compare bits 32-39 between periodic reads and ts40, + * see if HW clock may have wrapped since last read. We are sure + * that periodic reads are always at least ~1 minute behind, so + * this logic works perfectly fine. + */ + ts_top = ts40 >> 32; + if (ts_top < (u8)high && (u8)high - ts_top > U8_MAX / 2) + time_ns += 1ULL << 40; + + return time_ns + offset; +} + static unsigned int fbnic_desc_unused(struct fbnic_ring *ring) { return (ring->head - ring->tail - 1) & ring->size_mask; @@ -710,6 +750,10 @@ static struct sk_buff *fbnic_build_skb(struct fbnic_napi_vector *nv, /* Set MAC header specific fields */ skb->protocol = eth_type_trans(skb, nv->napi.dev); + /* Add timestamp if present */ + if (pkt->hwtstamp) + skb_hwtstamps(skb)->hwtstamp = pkt->hwtstamp; + return skb; } @@ -720,6 +764,23 @@ static enum pkt_hash_types fbnic_skb_hash_type(u64 rcd) PKT_HASH_TYPE_L2; } +static void fbnic_rx_tstamp(struct fbnic_napi_vector *nv, u64 rcd, + struct fbnic_pkt_buff *pkt) +{ + struct fbnic_net *fbn; + u64 ns, ts; + + if (!FIELD_GET(FBNIC_RCD_OPT_META_TS, rcd)) + return; + + fbn = netdev_priv(nv->napi.dev); + ts = FIELD_GET(FBNIC_RCD_OPT_META_TS_MASK, rcd); + ns = fbnic_ts40_to_ns(fbn, ts); + + /* Add timestamp to shared info */ + pkt->hwtstamp = ns_to_ktime(ns); +} + static void fbnic_populate_skb_fields(struct fbnic_napi_vector *nv, u64 rcd, struct sk_buff *skb, struct fbnic_q_triad *qt) @@ -784,6 +845,8 @@ static int fbnic_clean_rcq(struct fbnic_napi_vector *nv, if (FIELD_GET(FBNIC_RCD_OPT_META_TYPE_MASK, rcd)) break; + fbnic_rx_tstamp(nv, rcd, pkt); + /* We currently ignore the action table index */ break; case FBNIC_RCD_TYPE_META: diff --git a/drivers/net/ethernet/meta/fbnic/fbnic_txrx.h b/drivers/net/ethernet/meta/fbnic/fbnic_txrx.h index 2f91f68d11d57..682d875f08c07 100644 --- a/drivers/net/ethernet/meta/fbnic/fbnic_txrx.h +++ b/drivers/net/ethernet/meta/fbnic/fbnic_txrx.h @@ -47,6 +47,7 @@ struct fbnic_net; struct fbnic_pkt_buff { struct xdp_buff buff; + ktime_t hwtstamp; u32 data_truesize; u16 data_len; u16 nr_frags; From ad3d9f8bc66c5d717977b224b19478d996d125d0 Mon Sep 17 00:00:00 2001 From: Vadim Fedorenko Date: Tue, 8 Oct 2024 11:14:35 -0700 Subject: [PATCH 4/5] eth: fbnic: add TX packets timestamping support Add TX configuration to ethtool interface. Add processing of TX timestamp completions as well as configuration to request HW to create TX timestamp completion. Signed-off-by: Vadim Fedorenko Signed-off-by: Paolo Abeni --- .../net/ethernet/meta/fbnic/fbnic_ethtool.c | 5 + drivers/net/ethernet/meta/fbnic/fbnic_txrx.c | 93 ++++++++++++++++++- 2 files changed, 95 insertions(+), 3 deletions(-) diff --git a/drivers/net/ethernet/meta/fbnic/fbnic_ethtool.c b/drivers/net/ethernet/meta/fbnic/fbnic_ethtool.c index 3afb7227574a7..24e0594432642 100644 --- a/drivers/net/ethernet/meta/fbnic/fbnic_ethtool.c +++ b/drivers/net/ethernet/meta/fbnic/fbnic_ethtool.c @@ -16,9 +16,14 @@ fbnic_get_ts_info(struct net_device *netdev, tsinfo->so_timestamping = SOF_TIMESTAMPING_TX_SOFTWARE | + SOF_TIMESTAMPING_TX_HARDWARE | SOF_TIMESTAMPING_RX_HARDWARE | SOF_TIMESTAMPING_RAW_HARDWARE; + tsinfo->tx_types = + BIT(HWTSTAMP_TX_OFF) | + BIT(HWTSTAMP_TX_ON); + tsinfo->rx_filters = BIT(HWTSTAMP_FILTER_NONE) | BIT(HWTSTAMP_FILTER_PTP_V1_L4_EVENT) | diff --git a/drivers/net/ethernet/meta/fbnic/fbnic_txrx.c b/drivers/net/ethernet/meta/fbnic/fbnic_txrx.c index cbf7a6c6331a3..2e3d06946e747 100644 --- a/drivers/net/ethernet/meta/fbnic/fbnic_txrx.c +++ b/drivers/net/ethernet/meta/fbnic/fbnic_txrx.c @@ -12,9 +12,14 @@ #include "fbnic_netdev.h" #include "fbnic_txrx.h" +enum { + FBNIC_XMIT_CB_TS = 0x01, +}; + struct fbnic_xmit_cb { u32 bytecount; u8 desc_count; + u8 flags; int hw_head; }; @@ -150,11 +155,32 @@ static void fbnic_unmap_page_twd(struct device *dev, __le64 *twd) #define FBNIC_TWD_TYPE(_type) \ cpu_to_le64(FIELD_PREP(FBNIC_TWD_TYPE_MASK, FBNIC_TWD_TYPE_##_type)) +static bool fbnic_tx_tstamp(struct sk_buff *skb) +{ + struct fbnic_net *fbn; + + if (!unlikely(skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP)) + return false; + + fbn = netdev_priv(skb->dev); + if (fbn->hwtstamp_config.tx_type == HWTSTAMP_TX_OFF) + return false; + + skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS; + FBNIC_XMIT_CB(skb)->flags |= FBNIC_XMIT_CB_TS; + FBNIC_XMIT_CB(skb)->hw_head = -1; + + return true; +} + static bool fbnic_tx_offloads(struct fbnic_ring *ring, struct sk_buff *skb, __le64 *meta) { unsigned int l2len, i3len; + if (fbnic_tx_tstamp(skb)) + *meta |= cpu_to_le64(FBNIC_TWD_FLAG_REQ_TS); + if (unlikely(skb->ip_summed != CHECKSUM_PARTIAL)) return false; @@ -374,6 +400,12 @@ static void fbnic_clean_twq0(struct fbnic_napi_vector *nv, int napi_budget, if (desc_cnt > clean_desc) break; + if (unlikely(FBNIC_XMIT_CB(skb)->flags & FBNIC_XMIT_CB_TS)) { + FBNIC_XMIT_CB(skb)->hw_head = hw_head; + if (likely(!discard)) + break; + } + ring->tx_buf[head] = NULL; clean_desc -= desc_cnt; @@ -427,6 +459,53 @@ static void fbnic_clean_twq0(struct fbnic_napi_vector *nv, int napi_budget, FBNIC_TX_DESC_WAKEUP); } +static void fbnic_clean_tsq(struct fbnic_napi_vector *nv, + struct fbnic_ring *ring, + u64 tcd, int *ts_head, int *head0) +{ + struct skb_shared_hwtstamps hwtstamp; + struct fbnic_net *fbn; + struct sk_buff *skb; + int head; + u64 ns; + + head = (*ts_head < 0) ? ring->head : *ts_head; + + do { + unsigned int desc_cnt; + + if (head == ring->tail) { + if (unlikely(net_ratelimit())) + netdev_err(nv->napi.dev, + "Tx timestamp without matching packet\n"); + return; + } + + skb = ring->tx_buf[head]; + desc_cnt = FBNIC_XMIT_CB(skb)->desc_count; + + head += desc_cnt; + head &= ring->size_mask; + } while (!(FBNIC_XMIT_CB(skb)->flags & FBNIC_XMIT_CB_TS)); + + fbn = netdev_priv(nv->napi.dev); + ns = fbnic_ts40_to_ns(fbn, FIELD_GET(FBNIC_TCD_TYPE1_TS_MASK, tcd)); + + memset(&hwtstamp, 0, sizeof(hwtstamp)); + hwtstamp.hwtstamp = ns_to_ktime(ns); + + *ts_head = head; + + FBNIC_XMIT_CB(skb)->flags &= ~FBNIC_XMIT_CB_TS; + if (*head0 < 0) { + head = FBNIC_XMIT_CB(skb)->hw_head; + if (head >= 0) + *head0 = head; + } + + skb_tstamp_tx(skb, &hwtstamp); +} + static void fbnic_page_pool_init(struct fbnic_ring *ring, unsigned int idx, struct page *page) { @@ -460,10 +539,12 @@ static void fbnic_page_pool_drain(struct fbnic_ring *ring, unsigned int idx, } static void fbnic_clean_twq(struct fbnic_napi_vector *nv, int napi_budget, - struct fbnic_q_triad *qt, s32 head0) + struct fbnic_q_triad *qt, s32 ts_head, s32 head0) { if (head0 >= 0) fbnic_clean_twq0(nv, napi_budget, &qt->sub0, false, head0); + else if (ts_head >= 0) + fbnic_clean_twq0(nv, napi_budget, &qt->sub0, false, ts_head); } static void @@ -471,9 +552,9 @@ fbnic_clean_tcq(struct fbnic_napi_vector *nv, struct fbnic_q_triad *qt, int napi_budget) { struct fbnic_ring *cmpl = &qt->cmpl; + s32 head0 = -1, ts_head = -1; __le64 *raw_tcd, done; u32 head = cmpl->head; - s32 head0 = -1; done = (head & (cmpl->size_mask + 1)) ? 0 : cpu_to_le64(FBNIC_TCD_DONE); raw_tcd = &cmpl->desc[head & cmpl->size_mask]; @@ -496,6 +577,12 @@ fbnic_clean_tcq(struct fbnic_napi_vector *nv, struct fbnic_q_triad *qt, * they are skipped for now. */ break; + case FBNIC_TCD_TYPE_1: + if (WARN_ON_ONCE(tcd & FBNIC_TCD_TWQ1)) + break; + + fbnic_clean_tsq(nv, &qt->sub0, tcd, &ts_head, &head0); + break; default: break; } @@ -515,7 +602,7 @@ fbnic_clean_tcq(struct fbnic_napi_vector *nv, struct fbnic_q_triad *qt, } /* Unmap and free processed buffers */ - fbnic_clean_twq(nv, napi_budget, qt, head0); + fbnic_clean_twq(nv, napi_budget, qt, ts_head, head0); } static void fbnic_clean_bdq(struct fbnic_napi_vector *nv, int napi_budget, From 96f358f75d1a4efbbaf0302395fde339934226f3 Mon Sep 17 00:00:00 2001 From: Vadim Fedorenko Date: Tue, 8 Oct 2024 11:14:36 -0700 Subject: [PATCH 5/5] eth: fbnic: add ethtool timestamping statistics Add counters of packets with HW timestamps requests and lost timestamps with no associated skbs. Use ethtool interface to report these counters. Signed-off-by: Vadim Fedorenko Signed-off-by: Paolo Abeni --- .../net/ethernet/meta/fbnic/fbnic_ethtool.c | 24 +++++++++++++++++++ drivers/net/ethernet/meta/fbnic/fbnic_txrx.c | 9 ++++++- drivers/net/ethernet/meta/fbnic/fbnic_txrx.h | 2 ++ 3 files changed, 34 insertions(+), 1 deletion(-) diff --git a/drivers/net/ethernet/meta/fbnic/fbnic_ethtool.c b/drivers/net/ethernet/meta/fbnic/fbnic_ethtool.c index 24e0594432642..1117d5a32867c 100644 --- a/drivers/net/ethernet/meta/fbnic/fbnic_ethtool.c +++ b/drivers/net/ethernet/meta/fbnic/fbnic_ethtool.c @@ -93,9 +93,33 @@ fbnic_get_eth_mac_stats(struct net_device *netdev, &mac_stats->eth_mac.FrameTooLongErrors); } +static void fbnic_get_ts_stats(struct net_device *netdev, + struct ethtool_ts_stats *ts_stats) +{ + struct fbnic_net *fbn = netdev_priv(netdev); + u64 ts_packets, ts_lost; + struct fbnic_ring *ring; + unsigned int start; + int i; + + ts_stats->pkts = fbn->tx_stats.ts_packets; + ts_stats->lost = fbn->tx_stats.ts_lost; + for (i = 0; i < fbn->num_tx_queues; i++) { + ring = fbn->tx[i]; + do { + start = u64_stats_fetch_begin(&ring->stats.syncp); + ts_packets = ring->stats.ts_packets; + ts_lost = ring->stats.ts_lost; + } while (u64_stats_fetch_retry(&ring->stats.syncp, start)); + ts_stats->pkts += ts_packets; + ts_stats->lost += ts_lost; + } +} + static const struct ethtool_ops fbnic_ethtool_ops = { .get_drvinfo = fbnic_get_drvinfo, .get_ts_info = fbnic_get_ts_info, + .get_ts_stats = fbnic_get_ts_stats, .get_eth_mac_stats = fbnic_get_eth_mac_stats, }; diff --git a/drivers/net/ethernet/meta/fbnic/fbnic_txrx.c b/drivers/net/ethernet/meta/fbnic/fbnic_txrx.c index 2e3d06946e747..b5050fabe8fe8 100644 --- a/drivers/net/ethernet/meta/fbnic/fbnic_txrx.c +++ b/drivers/net/ethernet/meta/fbnic/fbnic_txrx.c @@ -385,7 +385,7 @@ static void fbnic_clean_twq0(struct fbnic_napi_vector *nv, int napi_budget, struct fbnic_ring *ring, bool discard, unsigned int hw_head) { - u64 total_bytes = 0, total_packets = 0; + u64 total_bytes = 0, total_packets = 0, ts_lost = 0; unsigned int head = ring->head; struct netdev_queue *txq; unsigned int clean_desc; @@ -404,6 +404,7 @@ static void fbnic_clean_twq0(struct fbnic_napi_vector *nv, int napi_budget, FBNIC_XMIT_CB(skb)->hw_head = hw_head; if (likely(!discard)) break; + ts_lost++; } ring->tx_buf[head] = NULL; @@ -443,6 +444,7 @@ static void fbnic_clean_twq0(struct fbnic_napi_vector *nv, int napi_budget, if (unlikely(discard)) { u64_stats_update_begin(&ring->stats.syncp); ring->stats.dropped += total_packets; + ring->stats.ts_lost += ts_lost; u64_stats_update_end(&ring->stats.syncp); netdev_tx_completed_queue(txq, total_packets, total_bytes); @@ -504,6 +506,9 @@ static void fbnic_clean_tsq(struct fbnic_napi_vector *nv, } skb_tstamp_tx(skb, &hwtstamp); + u64_stats_update_begin(&ring->stats.syncp); + ring->stats.ts_packets++; + u64_stats_update_end(&ring->stats.syncp); } static void fbnic_page_pool_init(struct fbnic_ring *ring, unsigned int idx, @@ -1060,6 +1065,8 @@ static void fbnic_aggregate_ring_tx_counters(struct fbnic_net *fbn, fbn->tx_stats.bytes += stats->bytes; fbn->tx_stats.packets += stats->packets; fbn->tx_stats.dropped += stats->dropped; + fbn->tx_stats.ts_lost += stats->ts_lost; + fbn->tx_stats.ts_packets += stats->ts_packets; } static void fbnic_remove_tx_ring(struct fbnic_net *fbn, diff --git a/drivers/net/ethernet/meta/fbnic/fbnic_txrx.h b/drivers/net/ethernet/meta/fbnic/fbnic_txrx.h index 682d875f08c07..8d626287c3f47 100644 --- a/drivers/net/ethernet/meta/fbnic/fbnic_txrx.h +++ b/drivers/net/ethernet/meta/fbnic/fbnic_txrx.h @@ -57,6 +57,8 @@ struct fbnic_queue_stats { u64 packets; u64 bytes; u64 dropped; + u64 ts_packets; + u64 ts_lost; struct u64_stats_sync syncp; };