// SPDX-License-Identifier: GPL-2.0 /* Copyright (c) 2019 Intel Corporation */ #include "igc.h" #include <linux/module.h> #include <linux/device.h> #include <linux/pci.h> #include <linux/ptp_classify.h> #include <linux/clocksource.h> #include <linux/ktime.h> #include <linux/delay.h> #include <linux/iopoll.h> #include <net/xdp_sock_drv.h> #define INCVALUE_MASK … #define ISGN … #define IGC_PTP_TX_TIMEOUT … #define IGC_PTM_STAT_SLEEP … #define IGC_PTM_STAT_TIMEOUT … /* SYSTIM read access for I225 */ void igc_ptp_read(struct igc_adapter *adapter, struct timespec64 *ts) { … } static void igc_ptp_write_i225(struct igc_adapter *adapter, const struct timespec64 *ts) { … } static int igc_ptp_adjfine_i225(struct ptp_clock_info *ptp, long scaled_ppm) { … } static int igc_ptp_adjtime_i225(struct ptp_clock_info *ptp, s64 delta) { … } static int igc_ptp_gettimex64_i225(struct ptp_clock_info *ptp, struct timespec64 *ts, struct ptp_system_timestamp *sts) { … } static int igc_ptp_settime_i225(struct ptp_clock_info *ptp, const struct timespec64 *ts) { … } static void igc_pin_direction(int pin, int input, u32 *ctrl, u32 *ctrl_ext) { … } static void igc_pin_perout(struct igc_adapter *igc, int chan, int pin, int freq) { … } static void igc_pin_extts(struct igc_adapter *igc, int chan, int pin) { … } static int igc_ptp_feature_enable_i225(struct ptp_clock_info *ptp, struct ptp_clock_request *rq, int on) { … } static int igc_ptp_verify_pin(struct ptp_clock_info *ptp, unsigned int pin, enum ptp_pin_function func, unsigned int chan) { … } /** * igc_ptp_systim_to_hwtstamp - convert system time value to HW timestamp * @adapter: board private structure * @hwtstamps: timestamp structure to update * @systim: unsigned 64bit system time value * * We need to convert the system time value stored in the RX/TXSTMP registers * into a hwtstamp which can be used by the upper level timestamping functions. * * Returns 0 on success. **/ static int igc_ptp_systim_to_hwtstamp(struct igc_adapter *adapter, struct skb_shared_hwtstamps *hwtstamps, u64 systim) { … } /** * igc_ptp_rx_pktstamp - Retrieve timestamp from Rx packet buffer * @adapter: Pointer to adapter the packet buffer belongs to * @buf: Pointer to start of timestamp in HW format (2 32-bit words) * * This function retrieves and converts the timestamp stored at @buf * to ktime_t, adjusting for hardware latencies. * * Returns timestamp value. */ ktime_t igc_ptp_rx_pktstamp(struct igc_adapter *adapter, __le32 *buf) { … } static void igc_ptp_disable_rx_timestamp(struct igc_adapter *adapter) { … } static void igc_ptp_enable_rx_timestamp(struct igc_adapter *adapter) { … } static void igc_ptp_free_tx_buffer(struct igc_adapter *adapter, struct igc_tx_timestamp_request *tstamp) { … } static void igc_ptp_clear_tx_tstamp(struct igc_adapter *adapter) { … } static void igc_ptp_disable_tx_timestamp(struct igc_adapter *adapter) { … } static void igc_ptp_enable_tx_timestamp(struct igc_adapter *adapter) { … } /** * igc_ptp_set_timestamp_mode - setup hardware for timestamping * @adapter: networking device structure * @config: hwtstamp configuration * * Return: 0 in case of success, negative errno code otherwise. */ static int igc_ptp_set_timestamp_mode(struct igc_adapter *adapter, struct hwtstamp_config *config) { … } /* Requires adapter->ptp_tx_lock held by caller. */ static void igc_ptp_tx_timeout(struct igc_adapter *adapter, struct igc_tx_timestamp_request *tstamp) { … } void igc_ptp_tx_hang(struct igc_adapter *adapter) { … } static void igc_ptp_tx_reg_to_stamp(struct igc_adapter *adapter, struct igc_tx_timestamp_request *tstamp, u64 regval) { … } /** * igc_ptp_tx_hwtstamp - utility function which checks for TX time stamp * @adapter: Board private structure * * Check against the ready mask for which of the timestamp register * sets are ready to be retrieved, then retrieve that and notify the * rest of the stack. * * Context: Expects adapter->ptp_tx_lock to be held by caller. */ static void igc_ptp_tx_hwtstamp(struct igc_adapter *adapter) { … } /** * igc_ptp_tx_tstamp_event * @adapter: board private structure * * Called when a TX timestamp interrupt happens to retrieve the * timestamp and send it up to the socket. */ void igc_ptp_tx_tstamp_event(struct igc_adapter *adapter) { … } /** * igc_ptp_set_ts_config - set hardware time stamping config * @netdev: network interface device structure * @ifr: interface request data * **/ int igc_ptp_set_ts_config(struct net_device *netdev, struct ifreq *ifr) { … } /** * igc_ptp_get_ts_config - get hardware time stamping config * @netdev: network interface device structure * @ifr: interface request data * * Get the hwtstamp_config settings to return to the user. Rather than attempt * to deconstruct the settings from the registers, just return a shadow copy * of the last known settings. **/ int igc_ptp_get_ts_config(struct net_device *netdev, struct ifreq *ifr) { … } /* The two conditions below must be met for cross timestamping via * PCIe PTM: * * 1. We have an way to convert the timestamps in the PTM messages * to something related to the system clocks (right now, only * X86 systems with support for the Always Running Timer allow that); * * 2. We have PTM enabled in the path from the device to the PCIe root port. */ static bool igc_is_crosststamp_supported(struct igc_adapter *adapter) { … } static struct system_counterval_t igc_device_tstamp_to_system(u64 tstamp) { … } static void igc_ptm_log_error(struct igc_adapter *adapter, u32 ptm_stat) { … } static int igc_phc_get_syncdevicetime(ktime_t *device, struct system_counterval_t *system, void *ctx) { … } static int igc_ptp_getcrosststamp(struct ptp_clock_info *ptp, struct system_device_crosststamp *cts) { … } static int igc_ptp_getcyclesx64(struct ptp_clock_info *ptp, struct timespec64 *ts, struct ptp_system_timestamp *sts) { … } /** * igc_ptp_init - Initialize PTP functionality * @adapter: Board private structure * * This function is called at device probe to initialize the PTP * functionality. */ void igc_ptp_init(struct igc_adapter *adapter) { … } static void igc_ptp_time_save(struct igc_adapter *adapter) { … } static void igc_ptp_time_restore(struct igc_adapter *adapter) { … } static void igc_ptm_stop(struct igc_adapter *adapter) { … } /** * igc_ptp_suspend - Disable PTP work items and prepare for suspend * @adapter: Board private structure * * This function stops the overflow check work and PTP Tx timestamp work, and * will prepare the device for OS suspend. */ void igc_ptp_suspend(struct igc_adapter *adapter) { … } /** * igc_ptp_stop - Disable PTP device and stop the overflow check. * @adapter: Board private structure. * * This function stops the PTP support and cancels the delayed work. **/ void igc_ptp_stop(struct igc_adapter *adapter) { … } /** * igc_ptp_reset - Re-enable the adapter for PTP following a reset. * @adapter: Board private structure. * * This function handles the reset work required to re-enable the PTP device. **/ void igc_ptp_reset(struct igc_adapter *adapter) { … }
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