diff options
Diffstat (limited to 'drivers/net/ethernet/qlogic/qede/qede_ptp.c')
| -rw-r--r-- | drivers/net/ethernet/qlogic/qede/qede_ptp.c | 547 |
1 files changed, 547 insertions, 0 deletions
diff --git a/drivers/net/ethernet/qlogic/qede/qede_ptp.c b/drivers/net/ethernet/qlogic/qede/qede_ptp.c new file mode 100644 index 000000000..c9c8225f0 --- /dev/null +++ b/drivers/net/ethernet/qlogic/qede/qede_ptp.c @@ -0,0 +1,547 @@ +// SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause) +/* QLogic qede NIC Driver + * Copyright (c) 2015-2017 QLogic Corporation + * Copyright (c) 2019-2020 Marvell International Ltd. + */ + +#include "qede_ptp.h" +#define QEDE_PTP_TX_TIMEOUT (2 * HZ) + +struct qede_ptp { + const struct qed_eth_ptp_ops *ops; + struct ptp_clock_info clock_info; + struct cyclecounter cc; + struct timecounter tc; + struct ptp_clock *clock; + struct work_struct work; + unsigned long ptp_tx_start; + struct qede_dev *edev; + struct sk_buff *tx_skb; + + /* ptp spinlock is used for protecting the cycle/time counter fields + * and, also for serializing the qed PTP API invocations. + */ + spinlock_t lock; + bool hw_ts_ioctl_called; + u16 tx_type; + u16 rx_filter; +}; + +/** + * qede_ptp_adjfreq() - Adjust the frequency of the PTP cycle counter. + * + * @info: The PTP clock info structure. + * @ppb: Parts per billion adjustment from base. + * + * Return: Zero on success, negative errno otherwise. + */ +static int qede_ptp_adjfreq(struct ptp_clock_info *info, s32 ppb) +{ + struct qede_ptp *ptp = container_of(info, struct qede_ptp, clock_info); + struct qede_dev *edev = ptp->edev; + int rc; + + __qede_lock(edev); + if (edev->state == QEDE_STATE_OPEN) { + spin_lock_bh(&ptp->lock); + rc = ptp->ops->adjfreq(edev->cdev, ppb); + spin_unlock_bh(&ptp->lock); + } else { + DP_ERR(edev, "PTP adjfreq called while interface is down\n"); + rc = -EFAULT; + } + __qede_unlock(edev); + + return rc; +} + +static int qede_ptp_adjtime(struct ptp_clock_info *info, s64 delta) +{ + struct qede_dev *edev; + struct qede_ptp *ptp; + + ptp = container_of(info, struct qede_ptp, clock_info); + edev = ptp->edev; + + DP_VERBOSE(edev, QED_MSG_DEBUG, "PTP adjtime called, delta = %llx\n", + delta); + + spin_lock_bh(&ptp->lock); + timecounter_adjtime(&ptp->tc, delta); + spin_unlock_bh(&ptp->lock); + + return 0; +} + +static int qede_ptp_gettime(struct ptp_clock_info *info, struct timespec64 *ts) +{ + struct qede_dev *edev; + struct qede_ptp *ptp; + u64 ns; + + ptp = container_of(info, struct qede_ptp, clock_info); + edev = ptp->edev; + + spin_lock_bh(&ptp->lock); + ns = timecounter_read(&ptp->tc); + spin_unlock_bh(&ptp->lock); + + DP_VERBOSE(edev, QED_MSG_DEBUG, "PTP gettime called, ns = %llu\n", ns); + + *ts = ns_to_timespec64(ns); + + return 0; +} + +static int qede_ptp_settime(struct ptp_clock_info *info, + const struct timespec64 *ts) +{ + struct qede_dev *edev; + struct qede_ptp *ptp; + u64 ns; + + ptp = container_of(info, struct qede_ptp, clock_info); + edev = ptp->edev; + + ns = timespec64_to_ns(ts); + + DP_VERBOSE(edev, QED_MSG_DEBUG, "PTP settime called, ns = %llu\n", ns); + + /* Re-init the timecounter */ + spin_lock_bh(&ptp->lock); + timecounter_init(&ptp->tc, &ptp->cc, ns); + spin_unlock_bh(&ptp->lock); + + return 0; +} + +/* Enable (or disable) ancillary features of the phc subsystem */ +static int qede_ptp_ancillary_feature_enable(struct ptp_clock_info *info, + struct ptp_clock_request *rq, + int on) +{ + struct qede_dev *edev; + struct qede_ptp *ptp; + + ptp = container_of(info, struct qede_ptp, clock_info); + edev = ptp->edev; + + DP_ERR(edev, "PHC ancillary features are not supported\n"); + + return -ENOTSUPP; +} + +static void qede_ptp_task(struct work_struct *work) +{ + struct skb_shared_hwtstamps shhwtstamps; + struct qede_dev *edev; + struct qede_ptp *ptp; + u64 timestamp, ns; + bool timedout; + int rc; + + ptp = container_of(work, struct qede_ptp, work); + edev = ptp->edev; + timedout = time_is_before_jiffies(ptp->ptp_tx_start + + QEDE_PTP_TX_TIMEOUT); + + /* Read Tx timestamp registers */ + spin_lock_bh(&ptp->lock); + rc = ptp->ops->read_tx_ts(edev->cdev, ×tamp); + spin_unlock_bh(&ptp->lock); + if (rc) { + if (unlikely(timedout)) { + DP_INFO(edev, "Tx timestamp is not recorded\n"); + dev_kfree_skb_any(ptp->tx_skb); + ptp->tx_skb = NULL; + clear_bit_unlock(QEDE_FLAGS_PTP_TX_IN_PRORGESS, + &edev->flags); + edev->ptp_skip_txts++; + } else { + /* Reschedule to keep checking for a valid TS value */ + schedule_work(&ptp->work); + } + return; + } + + ns = timecounter_cyc2time(&ptp->tc, timestamp); + memset(&shhwtstamps, 0, sizeof(shhwtstamps)); + shhwtstamps.hwtstamp = ns_to_ktime(ns); + skb_tstamp_tx(ptp->tx_skb, &shhwtstamps); + dev_kfree_skb_any(ptp->tx_skb); + ptp->tx_skb = NULL; + clear_bit_unlock(QEDE_FLAGS_PTP_TX_IN_PRORGESS, &edev->flags); + + DP_VERBOSE(edev, QED_MSG_DEBUG, + "Tx timestamp, timestamp cycles = %llu, ns = %llu\n", + timestamp, ns); +} + +/* Read the PHC. This API is invoked with ptp_lock held. */ +static u64 qede_ptp_read_cc(const struct cyclecounter *cc) +{ + struct qede_dev *edev; + struct qede_ptp *ptp; + u64 phc_cycles; + int rc; + + ptp = container_of(cc, struct qede_ptp, cc); + edev = ptp->edev; + rc = ptp->ops->read_cc(edev->cdev, &phc_cycles); + if (rc) + WARN_ONCE(1, "PHC read err %d\n", rc); + + DP_VERBOSE(edev, QED_MSG_DEBUG, "PHC read cycles = %llu\n", phc_cycles); + + return phc_cycles; +} + +static int qede_ptp_cfg_filters(struct qede_dev *edev) +{ + enum qed_ptp_hwtstamp_tx_type tx_type = QED_PTP_HWTSTAMP_TX_ON; + enum qed_ptp_filter_type rx_filter = QED_PTP_FILTER_NONE; + struct qede_ptp *ptp = edev->ptp; + + if (!ptp) + return -EIO; + + if (!ptp->hw_ts_ioctl_called) { + DP_INFO(edev, "TS IOCTL not called\n"); + return 0; + } + + switch (ptp->tx_type) { + case HWTSTAMP_TX_ON: + set_bit(QEDE_FLAGS_TX_TIMESTAMPING_EN, &edev->flags); + tx_type = QED_PTP_HWTSTAMP_TX_ON; + break; + + case HWTSTAMP_TX_OFF: + clear_bit(QEDE_FLAGS_TX_TIMESTAMPING_EN, &edev->flags); + tx_type = QED_PTP_HWTSTAMP_TX_OFF; + break; + + case HWTSTAMP_TX_ONESTEP_SYNC: + case HWTSTAMP_TX_ONESTEP_P2P: + DP_ERR(edev, "One-step timestamping is not supported\n"); + return -ERANGE; + } + + spin_lock_bh(&ptp->lock); + switch (ptp->rx_filter) { + case HWTSTAMP_FILTER_NONE: + rx_filter = QED_PTP_FILTER_NONE; + break; + case HWTSTAMP_FILTER_ALL: + case HWTSTAMP_FILTER_SOME: + case HWTSTAMP_FILTER_NTP_ALL: + ptp->rx_filter = HWTSTAMP_FILTER_NONE; + rx_filter = QED_PTP_FILTER_ALL; + break; + case HWTSTAMP_FILTER_PTP_V1_L4_EVENT: + ptp->rx_filter = HWTSTAMP_FILTER_PTP_V1_L4_EVENT; + rx_filter = QED_PTP_FILTER_V1_L4_EVENT; + break; + case HWTSTAMP_FILTER_PTP_V1_L4_SYNC: + case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ: + ptp->rx_filter = HWTSTAMP_FILTER_PTP_V1_L4_EVENT; + /* Initialize PTP detection for UDP/IPv4 events */ + rx_filter = QED_PTP_FILTER_V1_L4_GEN; + break; + case HWTSTAMP_FILTER_PTP_V2_L4_EVENT: + ptp->rx_filter = HWTSTAMP_FILTER_PTP_V2_L4_EVENT; + rx_filter = QED_PTP_FILTER_V2_L4_EVENT; + break; + case HWTSTAMP_FILTER_PTP_V2_L4_SYNC: + case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ: + ptp->rx_filter = HWTSTAMP_FILTER_PTP_V2_L4_EVENT; + /* Initialize PTP detection for UDP/IPv4 or UDP/IPv6 events */ + rx_filter = QED_PTP_FILTER_V2_L4_GEN; + break; + case HWTSTAMP_FILTER_PTP_V2_L2_EVENT: + ptp->rx_filter = HWTSTAMP_FILTER_PTP_V2_L2_EVENT; + rx_filter = QED_PTP_FILTER_V2_L2_EVENT; + break; + case HWTSTAMP_FILTER_PTP_V2_L2_SYNC: + case HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ: + ptp->rx_filter = HWTSTAMP_FILTER_PTP_V2_L2_EVENT; + /* Initialize PTP detection L2 events */ + rx_filter = QED_PTP_FILTER_V2_L2_GEN; + break; + case HWTSTAMP_FILTER_PTP_V2_EVENT: + ptp->rx_filter = HWTSTAMP_FILTER_PTP_V2_EVENT; + rx_filter = QED_PTP_FILTER_V2_EVENT; + break; + case HWTSTAMP_FILTER_PTP_V2_SYNC: + case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ: + ptp->rx_filter = HWTSTAMP_FILTER_PTP_V2_EVENT; + /* Initialize PTP detection L2, UDP/IPv4 or UDP/IPv6 events */ + rx_filter = QED_PTP_FILTER_V2_GEN; + break; + } + + ptp->ops->cfg_filters(edev->cdev, rx_filter, tx_type); + + spin_unlock_bh(&ptp->lock); + + return 0; +} + +int qede_ptp_hw_ts(struct qede_dev *edev, struct ifreq *ifr) +{ + struct hwtstamp_config config; + struct qede_ptp *ptp; + int rc; + + ptp = edev->ptp; + if (!ptp) + return -EIO; + + if (copy_from_user(&config, ifr->ifr_data, sizeof(config))) + return -EFAULT; + + DP_VERBOSE(edev, QED_MSG_DEBUG, + "HWTSTAMP IOCTL: Requested tx_type = %d, requested rx_filters = %d\n", + config.tx_type, config.rx_filter); + + ptp->hw_ts_ioctl_called = 1; + ptp->tx_type = config.tx_type; + ptp->rx_filter = config.rx_filter; + + rc = qede_ptp_cfg_filters(edev); + if (rc) + return rc; + + config.rx_filter = ptp->rx_filter; + + return copy_to_user(ifr->ifr_data, &config, + sizeof(config)) ? -EFAULT : 0; +} + +int qede_ptp_get_ts_info(struct qede_dev *edev, struct ethtool_ts_info *info) +{ + struct qede_ptp *ptp = edev->ptp; + + if (!ptp) { + info->so_timestamping = SOF_TIMESTAMPING_TX_SOFTWARE | + SOF_TIMESTAMPING_RX_SOFTWARE | + SOF_TIMESTAMPING_SOFTWARE; + info->phc_index = -1; + + return 0; + } + + info->so_timestamping = SOF_TIMESTAMPING_TX_SOFTWARE | + SOF_TIMESTAMPING_RX_SOFTWARE | + SOF_TIMESTAMPING_SOFTWARE | + SOF_TIMESTAMPING_TX_HARDWARE | + SOF_TIMESTAMPING_RX_HARDWARE | + SOF_TIMESTAMPING_RAW_HARDWARE; + + if (ptp->clock) + info->phc_index = ptp_clock_index(ptp->clock); + else + info->phc_index = -1; + + info->rx_filters = BIT(HWTSTAMP_FILTER_NONE) | + BIT(HWTSTAMP_FILTER_PTP_V1_L4_EVENT) | + BIT(HWTSTAMP_FILTER_PTP_V1_L4_SYNC) | + BIT(HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ) | + BIT(HWTSTAMP_FILTER_PTP_V2_L4_EVENT) | + BIT(HWTSTAMP_FILTER_PTP_V2_L4_SYNC) | + BIT(HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ) | + BIT(HWTSTAMP_FILTER_PTP_V2_L2_EVENT) | + BIT(HWTSTAMP_FILTER_PTP_V2_L2_SYNC) | + BIT(HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ) | + BIT(HWTSTAMP_FILTER_PTP_V2_EVENT) | + BIT(HWTSTAMP_FILTER_PTP_V2_SYNC) | + BIT(HWTSTAMP_FILTER_PTP_V2_DELAY_REQ); + + info->tx_types = BIT(HWTSTAMP_TX_OFF) | BIT(HWTSTAMP_TX_ON); + + return 0; +} + +void qede_ptp_disable(struct qede_dev *edev) +{ + struct qede_ptp *ptp; + + ptp = edev->ptp; + if (!ptp) + return; + + if (ptp->clock) { + ptp_clock_unregister(ptp->clock); + ptp->clock = NULL; + } + + /* Cancel PTP work queue. Should be done after the Tx queues are + * drained to prevent additional scheduling. + */ + cancel_work_sync(&ptp->work); + if (ptp->tx_skb) { + dev_kfree_skb_any(ptp->tx_skb); + ptp->tx_skb = NULL; + clear_bit_unlock(QEDE_FLAGS_PTP_TX_IN_PRORGESS, &edev->flags); + } + + /* Disable PTP in HW */ + spin_lock_bh(&ptp->lock); + ptp->ops->disable(edev->cdev); + spin_unlock_bh(&ptp->lock); + + kfree(ptp); + edev->ptp = NULL; +} + +static int qede_ptp_init(struct qede_dev *edev) +{ + struct qede_ptp *ptp; + int rc; + + ptp = edev->ptp; + if (!ptp) + return -EINVAL; + + spin_lock_init(&ptp->lock); + + /* Configure PTP in HW */ + rc = ptp->ops->enable(edev->cdev); + if (rc) { + DP_INFO(edev, "PTP HW enable failed\n"); + return rc; + } + + /* Init work queue for Tx timestamping */ + INIT_WORK(&ptp->work, qede_ptp_task); + + /* Init cyclecounter and timecounter */ + memset(&ptp->cc, 0, sizeof(ptp->cc)); + ptp->cc.read = qede_ptp_read_cc; + ptp->cc.mask = CYCLECOUNTER_MASK(64); + ptp->cc.shift = 0; + ptp->cc.mult = 1; + + timecounter_init(&ptp->tc, &ptp->cc, ktime_to_ns(ktime_get_real())); + + return 0; +} + +int qede_ptp_enable(struct qede_dev *edev) +{ + struct qede_ptp *ptp; + int rc; + + ptp = kzalloc(sizeof(*ptp), GFP_KERNEL); + if (!ptp) { + DP_INFO(edev, "Failed to allocate struct for PTP\n"); + return -ENOMEM; + } + + ptp->edev = edev; + ptp->ops = edev->ops->ptp; + if (!ptp->ops) { + DP_INFO(edev, "PTP enable failed\n"); + rc = -EIO; + goto err1; + } + + edev->ptp = ptp; + + rc = qede_ptp_init(edev); + if (rc) + goto err1; + + qede_ptp_cfg_filters(edev); + + /* Fill the ptp_clock_info struct and register PTP clock */ + ptp->clock_info.owner = THIS_MODULE; + snprintf(ptp->clock_info.name, 16, "%s", edev->ndev->name); + ptp->clock_info.max_adj = QED_MAX_PHC_DRIFT_PPB; + ptp->clock_info.n_alarm = 0; + ptp->clock_info.n_ext_ts = 0; + ptp->clock_info.n_per_out = 0; + ptp->clock_info.pps = 0; + ptp->clock_info.adjfreq = qede_ptp_adjfreq; + ptp->clock_info.adjtime = qede_ptp_adjtime; + ptp->clock_info.gettime64 = qede_ptp_gettime; + ptp->clock_info.settime64 = qede_ptp_settime; + ptp->clock_info.enable = qede_ptp_ancillary_feature_enable; + + ptp->clock = ptp_clock_register(&ptp->clock_info, &edev->pdev->dev); + if (IS_ERR(ptp->clock)) { + DP_ERR(edev, "PTP clock registration failed\n"); + qede_ptp_disable(edev); + rc = -EINVAL; + goto err2; + } + + return 0; + +err1: + kfree(ptp); +err2: + edev->ptp = NULL; + + return rc; +} + +void qede_ptp_tx_ts(struct qede_dev *edev, struct sk_buff *skb) +{ + struct qede_ptp *ptp; + + ptp = edev->ptp; + if (!ptp) + return; + + if (test_and_set_bit_lock(QEDE_FLAGS_PTP_TX_IN_PRORGESS, + &edev->flags)) { + DP_VERBOSE(edev, QED_MSG_DEBUG, "Timestamping in progress\n"); + edev->ptp_skip_txts++; + return; + } + + if (unlikely(!test_bit(QEDE_FLAGS_TX_TIMESTAMPING_EN, &edev->flags))) { + DP_VERBOSE(edev, QED_MSG_DEBUG, + "Tx timestamping was not enabled, this pkt will not be timestamped\n"); + clear_bit_unlock(QEDE_FLAGS_PTP_TX_IN_PRORGESS, &edev->flags); + edev->ptp_skip_txts++; + } else if (unlikely(ptp->tx_skb)) { + DP_VERBOSE(edev, QED_MSG_DEBUG, + "Device supports a single outstanding pkt to ts, It will not be ts\n"); + clear_bit_unlock(QEDE_FLAGS_PTP_TX_IN_PRORGESS, &edev->flags); + edev->ptp_skip_txts++; + } else { + skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS; + /* schedule check for Tx timestamp */ + ptp->tx_skb = skb_get(skb); + ptp->ptp_tx_start = jiffies; + schedule_work(&ptp->work); + } +} + +void qede_ptp_rx_ts(struct qede_dev *edev, struct sk_buff *skb) +{ + struct qede_ptp *ptp; + u64 timestamp, ns; + int rc; + + ptp = edev->ptp; + if (!ptp) + return; + + spin_lock_bh(&ptp->lock); + rc = ptp->ops->read_rx_ts(edev->cdev, ×tamp); + if (rc) { + spin_unlock_bh(&ptp->lock); + DP_INFO(edev, "Invalid Rx timestamp\n"); + return; + } + + ns = timecounter_cyc2time(&ptp->tc, timestamp); + spin_unlock_bh(&ptp->lock); + skb_hwtstamps(skb)->hwtstamp = ns_to_ktime(ns); + DP_VERBOSE(edev, QED_MSG_DEBUG, + "Rx timestamp, timestamp cycles = %llu, ns = %llu\n", + timestamp, ns); +} |