drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.c - linux - Git at Google

 /* Broadcom NetXtreme-C/E network driver.
  *
  * Copyright (c) 2021 Broadcom Inc.
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation.
  */
 #include <linux/kernel.h>
 #include <linux/errno.h>
 #include <linux/pci.h>
 #include <linux/netdevice.h>
 #include <linux/etherdevice.h>
 #include <linux/ptp_clock_kernel.h>
 #include <linux/net_tstamp.h>
 #include <linux/timecounter.h>
 #include <linux/timekeeping.h>
 #include <linux/ptp_classify.h>
 #include "bnxt_hsi.h"
 #include "bnxt.h"
 #include "bnxt_ptp.h"

 int bnxt_ptp_parse(struct sk_buff *skb, u16 *seq_id)
 {
 	unsigned int ptp_class;
 	struct ptp_header *hdr;

 	ptp_class = ptp_classify_raw(skb);

 	switch (ptp_class & PTP_CLASS_VMASK) {
 	case PTP_CLASS_V1:
 	case PTP_CLASS_V2:
 		hdr = ptp_parse_header(skb, ptp_class);
 		if (!hdr)
 			return -EINVAL;

 		*seq_id	 = ntohs(hdr->sequence_id);
 		return 0;
 	default:
 		return -ERANGE;
 	}
 }

 static int bnxt_ptp_settime(struct ptp_clock_info *ptp_info,
 			    const struct timespec64 *ts)
 {
 	struct bnxt_ptp_cfg *ptp = container_of(ptp_info, struct bnxt_ptp_cfg,
 						ptp_info);
 	u64 ns = timespec64_to_ns(ts);

 	spin_lock_bh(&ptp->ptp_lock);
 	timecounter_init(&ptp->tc, &ptp->cc, ns);
 	spin_unlock_bh(&ptp->ptp_lock);
 	return 0;
 }

 /* Caller holds ptp_lock */
 static u64 bnxt_refclk_read(struct bnxt *bp, struct ptp_system_timestamp *sts)
 {
 	struct bnxt_ptp_cfg *ptp = bp->ptp_cfg;
 	u64 ns;

 	ptp_read_system_prets(sts);
 	ns = readl(bp->bar0 + ptp->refclk_mapped_regs[0]);
 	ptp_read_system_postts(sts);
 	ns |= (u64)readl(bp->bar0 + ptp->refclk_mapped_regs[1]) << 32;
 	return ns;
 }

 static void bnxt_ptp_get_current_time(struct bnxt *bp)
 {
 	struct bnxt_ptp_cfg *ptp = bp->ptp_cfg;

 	if (!ptp)
 		return;
 	spin_lock_bh(&ptp->ptp_lock);
 	WRITE_ONCE(ptp->old_time, ptp->current_time);
 	ptp->current_time = bnxt_refclk_read(bp, NULL);
 	spin_unlock_bh(&ptp->ptp_lock);
 }

 static int bnxt_hwrm_port_ts_query(struct bnxt *bp, u32 flags, u64 *ts)
 {
 	struct hwrm_port_ts_query_output *resp = bp->hwrm_cmd_resp_addr;
 	struct hwrm_port_ts_query_input req = {0};
 	int rc;

 	bnxt_hwrm_cmd_hdr_init(bp, &req, HWRM_PORT_TS_QUERY, -1, -1);
 	req.flags = cpu_to_le32(flags);
 	if ((flags & PORT_TS_QUERY_REQ_FLAGS_PATH) ==
 	    PORT_TS_QUERY_REQ_FLAGS_PATH_TX) {
 		req.enables = cpu_to_le16(BNXT_PTP_QTS_TX_ENABLES);
 		req.ptp_seq_id = cpu_to_le32(bp->ptp_cfg->tx_seqid);
 		req.ts_req_timeout = cpu_to_le16(BNXT_PTP_QTS_TIMEOUT);
 	}
 	mutex_lock(&bp->hwrm_cmd_lock);
 	rc = _hwrm_send_message(bp, &req, sizeof(req), HWRM_CMD_TIMEOUT);
 	if (!rc)
 		*ts = le64_to_cpu(resp->ptp_msg_ts);
 	mutex_unlock(&bp->hwrm_cmd_lock);
 	return rc;
 }

 static int bnxt_ptp_gettimex(struct ptp_clock_info *ptp_info,
 			     struct timespec64 *ts,
 			     struct ptp_system_timestamp *sts)
 {
 	struct bnxt_ptp_cfg *ptp = container_of(ptp_info, struct bnxt_ptp_cfg,
 						ptp_info);
 	u64 ns, cycles;

 	spin_lock_bh(&ptp->ptp_lock);
 	cycles = bnxt_refclk_read(ptp->bp, sts);
 	ns = timecounter_cyc2time(&ptp->tc, cycles);
 	spin_unlock_bh(&ptp->ptp_lock);
 	*ts = ns_to_timespec64(ns);

 	return 0;
 }

 static int bnxt_ptp_adjtime(struct ptp_clock_info *ptp_info, s64 delta)
 {
 	struct bnxt_ptp_cfg *ptp = container_of(ptp_info, struct bnxt_ptp_cfg,
 						ptp_info);

 	spin_lock_bh(&ptp->ptp_lock);
 	timecounter_adjtime(&ptp->tc, delta);
 	spin_unlock_bh(&ptp->ptp_lock);
 	return 0;
 }

 static int bnxt_ptp_adjfreq(struct ptp_clock_info *ptp_info, s32 ppb)
 {
 	struct bnxt_ptp_cfg *ptp = container_of(ptp_info, struct bnxt_ptp_cfg,
 						ptp_info);
 	struct hwrm_port_mac_cfg_input req = {0};
 	struct bnxt *bp = ptp->bp;
 	int rc;

 	bnxt_hwrm_cmd_hdr_init(bp, &req, HWRM_PORT_MAC_CFG, -1, -1);
 	req.ptp_freq_adj_ppb = cpu_to_le32(ppb);
 	req.enables = cpu_to_le32(PORT_MAC_CFG_REQ_ENABLES_PTP_FREQ_ADJ_PPB);
 	rc = hwrm_send_message(bp, &req, sizeof(req), HWRM_CMD_TIMEOUT);
 	if (rc)
 		netdev_err(ptp->bp->dev,
 			   "ptp adjfreq failed. rc = %d\n", rc);
 	return rc;
 }

 static int bnxt_ptp_enable(struct ptp_clock_info *ptp,
 			   struct ptp_clock_request *rq, int on)
 {
 	return -EOPNOTSUPP;
 }

 static int bnxt_hwrm_ptp_cfg(struct bnxt *bp)
 {
 	struct hwrm_port_mac_cfg_input req = {0};
 	struct bnxt_ptp_cfg *ptp = bp->ptp_cfg;
 	u32 flags = 0;

 	bnxt_hwrm_cmd_hdr_init(bp, &req, HWRM_PORT_MAC_CFG, -1, -1);
 	if (ptp->rx_filter)
 		flags |= PORT_MAC_CFG_REQ_FLAGS_PTP_RX_TS_CAPTURE_ENABLE;
 	else
 		flags |= PORT_MAC_CFG_REQ_FLAGS_PTP_RX_TS_CAPTURE_DISABLE;
 	if (ptp->tx_tstamp_en)
 		flags |= PORT_MAC_CFG_REQ_FLAGS_PTP_TX_TS_CAPTURE_ENABLE;
 	else
 		flags |= PORT_MAC_CFG_REQ_FLAGS_PTP_TX_TS_CAPTURE_DISABLE;
 	req.flags = cpu_to_le32(flags);
 	req.enables = cpu_to_le32(PORT_MAC_CFG_REQ_ENABLES_RX_TS_CAPTURE_PTP_MSG_TYPE);
 	req.rx_ts_capture_ptp_msg_type = cpu_to_le16(ptp->rxctl);

 	return hwrm_send_message(bp, &req, sizeof(req), HWRM_CMD_TIMEOUT);
 }

 int bnxt_hwtstamp_set(struct net_device *dev, struct ifreq *ifr)
 {
 	struct bnxt *bp = netdev_priv(dev);
 	struct hwtstamp_config stmpconf;
 	struct bnxt_ptp_cfg *ptp;
 	u16 old_rxctl;
 	int old_rx_filter, rc;
 	u8 old_tx_tstamp_en;

 	ptp = bp->ptp_cfg;
 	if (!ptp)
 		return -EOPNOTSUPP;

 	if (copy_from_user(&stmpconf, ifr->ifr_data, sizeof(stmpconf)))
 		return -EFAULT;

 	if (stmpconf.flags)
 		return -EINVAL;

 	if (stmpconf.tx_type != HWTSTAMP_TX_ON &&
 	    stmpconf.tx_type != HWTSTAMP_TX_OFF)
 		return -ERANGE;

 	old_rx_filter = ptp->rx_filter;
 	old_rxctl = ptp->rxctl;
 	old_tx_tstamp_en = ptp->tx_tstamp_en;
 	switch (stmpconf.rx_filter) {
 	case HWTSTAMP_FILTER_NONE:
 		ptp->rxctl = 0;
 		ptp->rx_filter = HWTSTAMP_FILTER_NONE;
 		break;
 	case HWTSTAMP_FILTER_PTP_V2_EVENT:
 	case HWTSTAMP_FILTER_PTP_V2_L2_EVENT:
 	case HWTSTAMP_FILTER_PTP_V2_L4_EVENT:
 		ptp->rxctl = BNXT_PTP_MSG_EVENTS;
 		ptp->rx_filter = HWTSTAMP_FILTER_PTP_V2_EVENT;
 		break;
 	case HWTSTAMP_FILTER_PTP_V2_SYNC:
 	case HWTSTAMP_FILTER_PTP_V2_L2_SYNC:
 	case HWTSTAMP_FILTER_PTP_V2_L4_SYNC:
 		ptp->rxctl = BNXT_PTP_MSG_SYNC;
 		ptp->rx_filter = HWTSTAMP_FILTER_PTP_V2_SYNC;
 		break;
 	case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ:
 	case HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ:
 	case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ:
 		ptp->rxctl = BNXT_PTP_MSG_DELAY_REQ;
 		ptp->rx_filter = HWTSTAMP_FILTER_PTP_V2_DELAY_REQ;
 		break;
 	default:
 		return -ERANGE;
 	}

 	if (stmpconf.tx_type == HWTSTAMP_TX_ON)
 		ptp->tx_tstamp_en = 1;
 	else
 		ptp->tx_tstamp_en = 0;

 	rc = bnxt_hwrm_ptp_cfg(bp);
 	if (rc)
 		goto ts_set_err;

 	stmpconf.rx_filter = ptp->rx_filter;
 	return copy_to_user(ifr->ifr_data, &stmpconf, sizeof(stmpconf)) ?
 		-EFAULT : 0;

 ts_set_err:
 	ptp->rx_filter = old_rx_filter;
 	ptp->rxctl = old_rxctl;
 	ptp->tx_tstamp_en = old_tx_tstamp_en;
 	return rc;
 }

 int bnxt_hwtstamp_get(struct net_device *dev, struct ifreq *ifr)
 {
 	struct bnxt *bp = netdev_priv(dev);
 	struct hwtstamp_config stmpconf;
 	struct bnxt_ptp_cfg *ptp;

 	ptp = bp->ptp_cfg;
 	if (!ptp)
 		return -EOPNOTSUPP;

 	stmpconf.flags = 0;
 	stmpconf.tx_type = ptp->tx_tstamp_en ? HWTSTAMP_TX_ON : HWTSTAMP_TX_OFF;

 	stmpconf.rx_filter = ptp->rx_filter;
 	return copy_to_user(ifr->ifr_data, &stmpconf, sizeof(stmpconf)) ?
 		-EFAULT : 0;
 }

 static int bnxt_map_regs(struct bnxt *bp, u32 *reg_arr, int count, int reg_win)
 {
 	u32 reg_base = *reg_arr & BNXT_GRC_BASE_MASK;
 	u32 win_off;
 	int i;

 	for (i = 0; i < count; i++) {
 		if ((reg_arr[i] & BNXT_GRC_BASE_MASK) != reg_base)
 			return -ERANGE;
 	}
 	win_off = BNXT_GRCPF_REG_WINDOW_BASE_OUT + (reg_win - 1) * 4;
 	writel(reg_base, bp->bar0 + win_off);
 	return 0;
 }

 static int bnxt_map_ptp_regs(struct bnxt *bp)
 {
 	struct bnxt_ptp_cfg *ptp = bp->ptp_cfg;
 	u32 *reg_arr;
 	int rc, i;

 	reg_arr = ptp->refclk_regs;
 	if (bp->flags & BNXT_FLAG_CHIP_P5) {
 		rc = bnxt_map_regs(bp, reg_arr, 2, BNXT_PTP_GRC_WIN);
 		if (rc)
 			return rc;
 		for (i = 0; i < 2; i++)
 			ptp->refclk_mapped_regs[i] = BNXT_PTP_GRC_WIN_BASE +
 				(ptp->refclk_regs[i] & BNXT_GRC_OFFSET_MASK);
 		return 0;
 	}
 	return -ENODEV;
 }

 static void bnxt_unmap_ptp_regs(struct bnxt *bp)
 {
 	writel(0, bp->bar0 + BNXT_GRCPF_REG_WINDOW_BASE_OUT +
 		  (BNXT_PTP_GRC_WIN - 1) * 4);
 }

 static u64 bnxt_cc_read(const struct cyclecounter *cc)
 {
 	struct bnxt_ptp_cfg *ptp = container_of(cc, struct bnxt_ptp_cfg, cc);

 	return bnxt_refclk_read(ptp->bp, NULL);
 }

 static void bnxt_stamp_tx_skb(struct bnxt *bp, struct sk_buff *skb)
 {
 	struct bnxt_ptp_cfg *ptp = bp->ptp_cfg;
 	struct skb_shared_hwtstamps timestamp;
 	u64 ts = 0, ns = 0;
 	int rc;

 	rc = bnxt_hwrm_port_ts_query(bp, PORT_TS_QUERY_REQ_FLAGS_PATH_TX, &ts);
 	if (!rc) {
 		memset(&timestamp, 0, sizeof(timestamp));
 		spin_lock_bh(&ptp->ptp_lock);
 		ns = timecounter_cyc2time(&ptp->tc, ts);
 		spin_unlock_bh(&ptp->ptp_lock);
 		timestamp.hwtstamp = ns_to_ktime(ns);
 		skb_tstamp_tx(ptp->tx_skb, &timestamp);
 	} else {
 		netdev_err(bp->dev, "TS query for TX timer failed rc = %x\n",
 			   rc);
 	}

 	dev_kfree_skb_any(ptp->tx_skb);
 	ptp->tx_skb = NULL;
 	atomic_inc(&ptp->tx_avail);
 }

 static long bnxt_ptp_ts_aux_work(struct ptp_clock_info *ptp_info)
 {
 	struct bnxt_ptp_cfg *ptp = container_of(ptp_info, struct bnxt_ptp_cfg,
 						ptp_info);
 	unsigned long now = jiffies;
 	struct bnxt *bp = ptp->bp;

 	if (ptp->tx_skb)
 		bnxt_stamp_tx_skb(bp, ptp->tx_skb);

 	if (!time_after_eq(now, ptp->next_period))
 		return ptp->next_period - now;

 	bnxt_ptp_get_current_time(bp);
 	ptp->next_period = now + HZ;
 	return HZ;
 }

 int bnxt_get_tx_ts_p5(struct bnxt *bp, struct sk_buff *skb)
 {
 	struct bnxt_ptp_cfg *ptp = bp->ptp_cfg;

 	if (ptp->tx_skb) {
 		netdev_err(bp->dev, "deferring skb:one SKB is still outstanding\n");
 		return -EBUSY;
 	}
 	ptp->tx_skb = skb;
 	ptp_schedule_worker(ptp->ptp_clock, 0);
 	return 0;
 }

 int bnxt_get_rx_ts_p5(struct bnxt *bp, u64 *ts, u32 pkt_ts)
 {
 	struct bnxt_ptp_cfg *ptp = bp->ptp_cfg;
 	u64 time;

 	if (!ptp)
 		return -ENODEV;

 	BNXT_READ_TIME64(ptp, time, ptp->old_time);
 	*ts = (time & BNXT_HI_TIMER_MASK) | pkt_ts;
 	if (pkt_ts < (time & BNXT_LO_TIMER_MASK))
 		*ts += BNXT_LO_TIMER_MASK + 1;

 	return 0;
 }

 static const struct ptp_clock_info bnxt_ptp_caps = {
 	.owner		= THIS_MODULE,
 	.name		= "bnxt clock",
 	.max_adj	= BNXT_MAX_PHC_DRIFT,
 	.n_alarm	= 0,
 	.n_ext_ts	= 0,
 	.n_per_out	= 0,
 	.n_pins		= 0,
 	.pps		= 0,
 	.adjfreq	= bnxt_ptp_adjfreq,
 	.adjtime	= bnxt_ptp_adjtime,
 	.do_aux_work	= bnxt_ptp_ts_aux_work,
 	.gettimex64	= bnxt_ptp_gettimex,
 	.settime64	= bnxt_ptp_settime,
 	.enable		= bnxt_ptp_enable,
 };

 int bnxt_ptp_init(struct bnxt *bp)
 {
 	struct bnxt_ptp_cfg *ptp = bp->ptp_cfg;
 	int rc;

 	if (!ptp)
 		return 0;

 	rc = bnxt_map_ptp_regs(bp);
 	if (rc)
 		return rc;

 	atomic_set(&ptp->tx_avail, BNXT_MAX_TX_TS);
 	spin_lock_init(&ptp->ptp_lock);

 	memset(&ptp->cc, 0, sizeof(ptp->cc));
 	ptp->cc.read = bnxt_cc_read;
 	ptp->cc.mask = CYCLECOUNTER_MASK(48);
 	ptp->cc.shift = 0;
 	ptp->cc.mult = 1;

 	timecounter_init(&ptp->tc, &ptp->cc, ktime_to_ns(ktime_get_real()));

 	ptp->ptp_info = bnxt_ptp_caps;
 	ptp->ptp_clock = ptp_clock_register(&ptp->ptp_info, &bp->pdev->dev);
 	if (IS_ERR(ptp->ptp_clock)) {
 		int err = PTR_ERR(ptp->ptp_clock);

 		ptp->ptp_clock = NULL;
 		bnxt_unmap_ptp_regs(bp);
 		return err;
 	}
 	if (bp->flags & BNXT_FLAG_CHIP_P5) {
 		spin_lock_bh(&ptp->ptp_lock);
 		ptp->current_time = bnxt_refclk_read(bp, NULL);
 		WRITE_ONCE(ptp->old_time, ptp->current_time);
 		spin_unlock_bh(&ptp->ptp_lock);
 		ptp_schedule_worker(ptp->ptp_clock, 0);
 	}
 	return 0;
 }

 void bnxt_ptp_clear(struct bnxt *bp)
 {
 	struct bnxt_ptp_cfg *ptp = bp->ptp_cfg;

 	if (!ptp)
 		return;

 	if (ptp->ptp_clock)
 		ptp_clock_unregister(ptp->ptp_clock);

 	ptp->ptp_clock = NULL;
 	if (ptp->tx_skb) {
 		dev_kfree_skb_any(ptp->tx_skb);
 		ptp->tx_skb = NULL;
 	}
 	bnxt_unmap_ptp_regs(bp);
 }
	/* Broadcom NetXtreme-C/E network driver.
	*
	* Copyright (c) 2021 Broadcom Inc.
	*
	* This program is free software; you can redistribute it and/or modify
	* it under the terms of the GNU General Public License as published by
	* the Free Software Foundation.
	*/
	#include <linux/kernel.h>
	#include <linux/errno.h>
	#include <linux/pci.h>
	#include <linux/netdevice.h>
	#include <linux/etherdevice.h>
	#include <linux/ptp_clock_kernel.h>
	#include <linux/net_tstamp.h>
	#include <linux/timecounter.h>
	#include <linux/timekeeping.h>
	#include <linux/ptp_classify.h>
	#include "bnxt_hsi.h"
	#include "bnxt.h"
	#include "bnxt_ptp.h"

	int bnxt_ptp_parse(struct sk_buff skb, u16 seq_id)
	{
	unsigned int ptp_class;
	struct ptp_header *hdr;

	ptp_class = ptp_classify_raw(skb);

	switch (ptp_class & PTP_CLASS_VMASK) {
	case PTP_CLASS_V1:
	case PTP_CLASS_V2:
	hdr = ptp_parse_header(skb, ptp_class);
	if (!hdr)
	return -EINVAL;

	*seq_id = ntohs(hdr->sequence_id);
	return 0;
	default:
	return -ERANGE;
	}
	}

	static int bnxt_ptp_settime(struct ptp_clock_info *ptp_info,
	const struct timespec64 *ts)
	{
	struct bnxt_ptp_cfg *ptp = container_of(ptp_info, struct bnxt_ptp_cfg,
	ptp_info);
	u64 ns = timespec64_to_ns(ts);

	spin_lock_bh(&ptp->ptp_lock);
	timecounter_init(&ptp->tc, &ptp->cc, ns);
	spin_unlock_bh(&ptp->ptp_lock);
	return 0;
	}

	/* Caller holds ptp_lock */
	static u64 bnxt_refclk_read(struct bnxt bp, struct ptp_system_timestamp sts)
	{
	struct bnxt_ptp_cfg *ptp = bp->ptp_cfg;
	u64 ns;

	ptp_read_system_prets(sts);
	ns = readl(bp->bar0 + ptp->refclk_mapped_regs[0]);
	ptp_read_system_postts(sts);
	ns \|= (u64)readl(bp->bar0 + ptp->refclk_mapped_regs[1]) << 32;
	return ns;
	}

	static void bnxt_ptp_get_current_time(struct bnxt *bp)
	{
	struct bnxt_ptp_cfg *ptp = bp->ptp_cfg;

	if (!ptp)
	return;
	spin_lock_bh(&ptp->ptp_lock);
	WRITE_ONCE(ptp->old_time, ptp->current_time);
	ptp->current_time = bnxt_refclk_read(bp, NULL);
	spin_unlock_bh(&ptp->ptp_lock);
	}

	static int bnxt_hwrm_port_ts_query(struct bnxt bp, u32 flags, u64 ts)
	{
	struct hwrm_port_ts_query_output *resp = bp->hwrm_cmd_resp_addr;
	struct hwrm_port_ts_query_input req = {0};
	int rc;

	bnxt_hwrm_cmd_hdr_init(bp, &req, HWRM_PORT_TS_QUERY, -1, -1);
	req.flags = cpu_to_le32(flags);
	if ((flags & PORT_TS_QUERY_REQ_FLAGS_PATH) ==
	PORT_TS_QUERY_REQ_FLAGS_PATH_TX) {
	req.enables = cpu_to_le16(BNXT_PTP_QTS_TX_ENABLES);
	req.ptp_seq_id = cpu_to_le32(bp->ptp_cfg->tx_seqid);
	req.ts_req_timeout = cpu_to_le16(BNXT_PTP_QTS_TIMEOUT);
	}
	mutex_lock(&bp->hwrm_cmd_lock);
	rc = _hwrm_send_message(bp, &req, sizeof(req), HWRM_CMD_TIMEOUT);
	if (!rc)
	*ts = le64_to_cpu(resp->ptp_msg_ts);
	mutex_unlock(&bp->hwrm_cmd_lock);
	return rc;
	}

	static int bnxt_ptp_gettimex(struct ptp_clock_info *ptp_info,
	struct timespec64 *ts,
	struct ptp_system_timestamp *sts)
	{
	struct bnxt_ptp_cfg *ptp = container_of(ptp_info, struct bnxt_ptp_cfg,
	ptp_info);
	u64 ns, cycles;

	spin_lock_bh(&ptp->ptp_lock);
	cycles = bnxt_refclk_read(ptp->bp, sts);
	ns = timecounter_cyc2time(&ptp->tc, cycles);
	spin_unlock_bh(&ptp->ptp_lock);
	*ts = ns_to_timespec64(ns);

	return 0;
	}

	static int bnxt_ptp_adjtime(struct ptp_clock_info *ptp_info, s64 delta)
	{
	struct bnxt_ptp_cfg *ptp = container_of(ptp_info, struct bnxt_ptp_cfg,
	ptp_info);

	spin_lock_bh(&ptp->ptp_lock);
	timecounter_adjtime(&ptp->tc, delta);
	spin_unlock_bh(&ptp->ptp_lock);
	return 0;
	}

	static int bnxt_ptp_adjfreq(struct ptp_clock_info *ptp_info, s32 ppb)
	{
	struct bnxt_ptp_cfg *ptp = container_of(ptp_info, struct bnxt_ptp_cfg,
	ptp_info);
	struct hwrm_port_mac_cfg_input req = {0};
	struct bnxt *bp = ptp->bp;
	int rc;

	bnxt_hwrm_cmd_hdr_init(bp, &req, HWRM_PORT_MAC_CFG, -1, -1);
	req.ptp_freq_adj_ppb = cpu_to_le32(ppb);
	req.enables = cpu_to_le32(PORT_MAC_CFG_REQ_ENABLES_PTP_FREQ_ADJ_PPB);
	rc = hwrm_send_message(bp, &req, sizeof(req), HWRM_CMD_TIMEOUT);
	if (rc)
	netdev_err(ptp->bp->dev,
	"ptp adjfreq failed. rc = %d\n", rc);
	return rc;
	}

	static int bnxt_ptp_enable(struct ptp_clock_info *ptp,
	struct ptp_clock_request *rq, int on)
	{
	return -EOPNOTSUPP;
	}

	static int bnxt_hwrm_ptp_cfg(struct bnxt *bp)
	{
	struct hwrm_port_mac_cfg_input req = {0};
	struct bnxt_ptp_cfg *ptp = bp->ptp_cfg;
	u32 flags = 0;

	bnxt_hwrm_cmd_hdr_init(bp, &req, HWRM_PORT_MAC_CFG, -1, -1);
	if (ptp->rx_filter)
	flags \|= PORT_MAC_CFG_REQ_FLAGS_PTP_RX_TS_CAPTURE_ENABLE;
	else
	flags \|= PORT_MAC_CFG_REQ_FLAGS_PTP_RX_TS_CAPTURE_DISABLE;
	if (ptp->tx_tstamp_en)
	flags \|= PORT_MAC_CFG_REQ_FLAGS_PTP_TX_TS_CAPTURE_ENABLE;
	else
	flags \|= PORT_MAC_CFG_REQ_FLAGS_PTP_TX_TS_CAPTURE_DISABLE;
	req.flags = cpu_to_le32(flags);
	req.enables = cpu_to_le32(PORT_MAC_CFG_REQ_ENABLES_RX_TS_CAPTURE_PTP_MSG_TYPE);
	req.rx_ts_capture_ptp_msg_type = cpu_to_le16(ptp->rxctl);

	return hwrm_send_message(bp, &req, sizeof(req), HWRM_CMD_TIMEOUT);
	}

	int bnxt_hwtstamp_set(struct net_device dev, struct ifreq ifr)
	{
	struct bnxt *bp = netdev_priv(dev);
	struct hwtstamp_config stmpconf;
	struct bnxt_ptp_cfg *ptp;
	u16 old_rxctl;
	int old_rx_filter, rc;
	u8 old_tx_tstamp_en;

	ptp = bp->ptp_cfg;
	if (!ptp)
	return -EOPNOTSUPP;

	if (copy_from_user(&stmpconf, ifr->ifr_data, sizeof(stmpconf)))
	return -EFAULT;

	if (stmpconf.flags)
	return -EINVAL;

	if (stmpconf.tx_type != HWTSTAMP_TX_ON &&
	stmpconf.tx_type != HWTSTAMP_TX_OFF)
	return -ERANGE;

	old_rx_filter = ptp->rx_filter;
	old_rxctl = ptp->rxctl;
	old_tx_tstamp_en = ptp->tx_tstamp_en;
	switch (stmpconf.rx_filter) {
	case HWTSTAMP_FILTER_NONE:
	ptp->rxctl = 0;
	ptp->rx_filter = HWTSTAMP_FILTER_NONE;
	break;
	case HWTSTAMP_FILTER_PTP_V2_EVENT:
	case HWTSTAMP_FILTER_PTP_V2_L2_EVENT:
	case HWTSTAMP_FILTER_PTP_V2_L4_EVENT:
	ptp->rxctl = BNXT_PTP_MSG_EVENTS;
	ptp->rx_filter = HWTSTAMP_FILTER_PTP_V2_EVENT;
	break;
	case HWTSTAMP_FILTER_PTP_V2_SYNC:
	case HWTSTAMP_FILTER_PTP_V2_L2_SYNC:
	case HWTSTAMP_FILTER_PTP_V2_L4_SYNC:
	ptp->rxctl = BNXT_PTP_MSG_SYNC;
	ptp->rx_filter = HWTSTAMP_FILTER_PTP_V2_SYNC;
	break;
	case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ:
	case HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ:
	case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ:
	ptp->rxctl = BNXT_PTP_MSG_DELAY_REQ;
	ptp->rx_filter = HWTSTAMP_FILTER_PTP_V2_DELAY_REQ;
	break;
	default:
	return -ERANGE;
	}

	if (stmpconf.tx_type == HWTSTAMP_TX_ON)
	ptp->tx_tstamp_en = 1;
	else
	ptp->tx_tstamp_en = 0;

	rc = bnxt_hwrm_ptp_cfg(bp);
	if (rc)
	goto ts_set_err;

	stmpconf.rx_filter = ptp->rx_filter;
	return copy_to_user(ifr->ifr_data, &stmpconf, sizeof(stmpconf)) ?
	-EFAULT : 0;

	ts_set_err:
	ptp->rx_filter = old_rx_filter;
	ptp->rxctl = old_rxctl;
	ptp->tx_tstamp_en = old_tx_tstamp_en;
	return rc;
	}

	int bnxt_hwtstamp_get(struct net_device dev, struct ifreq ifr)
	{
	struct bnxt *bp = netdev_priv(dev);
	struct hwtstamp_config stmpconf;
	struct bnxt_ptp_cfg *ptp;

	ptp = bp->ptp_cfg;
	if (!ptp)
	return -EOPNOTSUPP;

	stmpconf.flags = 0;
	stmpconf.tx_type = ptp->tx_tstamp_en ? HWTSTAMP_TX_ON : HWTSTAMP_TX_OFF;

	stmpconf.rx_filter = ptp->rx_filter;
	return copy_to_user(ifr->ifr_data, &stmpconf, sizeof(stmpconf)) ?
	-EFAULT : 0;
	}

	static int bnxt_map_regs(struct bnxt bp, u32 reg_arr, int count, int reg_win)
	{
	u32 reg_base = *reg_arr & BNXT_GRC_BASE_MASK;
	u32 win_off;
	int i;

	for (i = 0; i < count; i++) {
	if ((reg_arr[i] & BNXT_GRC_BASE_MASK) != reg_base)
	return -ERANGE;
	}
	win_off = BNXT_GRCPF_REG_WINDOW_BASE_OUT + (reg_win - 1) * 4;
	writel(reg_base, bp->bar0 + win_off);
	return 0;
	}

	static int bnxt_map_ptp_regs(struct bnxt *bp)
	{
	struct bnxt_ptp_cfg *ptp = bp->ptp_cfg;
	u32 *reg_arr;
	int rc, i;

	reg_arr = ptp->refclk_regs;
	if (bp->flags & BNXT_FLAG_CHIP_P5) {
	rc = bnxt_map_regs(bp, reg_arr, 2, BNXT_PTP_GRC_WIN);
	if (rc)
	return rc;
	for (i = 0; i < 2; i++)
	ptp->refclk_mapped_regs[i] = BNXT_PTP_GRC_WIN_BASE +
	(ptp->refclk_regs[i] & BNXT_GRC_OFFSET_MASK);
	return 0;
	}
	return -ENODEV;
	}

	static void bnxt_unmap_ptp_regs(struct bnxt *bp)
	{
	writel(0, bp->bar0 + BNXT_GRCPF_REG_WINDOW_BASE_OUT +
	(BNXT_PTP_GRC_WIN - 1) * 4);
	}

	static u64 bnxt_cc_read(const struct cyclecounter *cc)
	{
	struct bnxt_ptp_cfg *ptp = container_of(cc, struct bnxt_ptp_cfg, cc);

	return bnxt_refclk_read(ptp->bp, NULL);
	}

	static void bnxt_stamp_tx_skb(struct bnxt bp, struct sk_buff skb)
	{
	struct bnxt_ptp_cfg *ptp = bp->ptp_cfg;
	struct skb_shared_hwtstamps timestamp;
	u64 ts = 0, ns = 0;
	int rc;

	rc = bnxt_hwrm_port_ts_query(bp, PORT_TS_QUERY_REQ_FLAGS_PATH_TX, &ts);
	if (!rc) {
	memset(&timestamp, 0, sizeof(timestamp));
	spin_lock_bh(&ptp->ptp_lock);
	ns = timecounter_cyc2time(&ptp->tc, ts);
	spin_unlock_bh(&ptp->ptp_lock);
	timestamp.hwtstamp = ns_to_ktime(ns);
	skb_tstamp_tx(ptp->tx_skb, &timestamp);
	} else {
	netdev_err(bp->dev, "TS query for TX timer failed rc = %x\n",
	rc);
	}

	dev_kfree_skb_any(ptp->tx_skb);
	ptp->tx_skb = NULL;
	atomic_inc(&ptp->tx_avail);
	}

	static long bnxt_ptp_ts_aux_work(struct ptp_clock_info *ptp_info)
	{
	struct bnxt_ptp_cfg *ptp = container_of(ptp_info, struct bnxt_ptp_cfg,
	ptp_info);
	unsigned long now = jiffies;
	struct bnxt *bp = ptp->bp;

	if (ptp->tx_skb)
	bnxt_stamp_tx_skb(bp, ptp->tx_skb);

	if (!time_after_eq(now, ptp->next_period))
	return ptp->next_period - now;

	bnxt_ptp_get_current_time(bp);
	ptp->next_period = now + HZ;
	return HZ;
	}

	int bnxt_get_tx_ts_p5(struct bnxt bp, struct sk_buff skb)
	{
	struct bnxt_ptp_cfg *ptp = bp->ptp_cfg;

	if (ptp->tx_skb) {
	netdev_err(bp->dev, "deferring skb:one SKB is still outstanding\n");
	return -EBUSY;
	}
	ptp->tx_skb = skb;
	ptp_schedule_worker(ptp->ptp_clock, 0);
	return 0;
	}

	int bnxt_get_rx_ts_p5(struct bnxt bp, u64 ts, u32 pkt_ts)
	{
	struct bnxt_ptp_cfg *ptp = bp->ptp_cfg;
	u64 time;

	if (!ptp)
	return -ENODEV;

	BNXT_READ_TIME64(ptp, time, ptp->old_time);
	*ts = (time & BNXT_HI_TIMER_MASK) \| pkt_ts;
	if (pkt_ts < (time & BNXT_LO_TIMER_MASK))
	*ts += BNXT_LO_TIMER_MASK + 1;

	return 0;
	}

	static const struct ptp_clock_info bnxt_ptp_caps = {
	.owner = THIS_MODULE,
	.name = "bnxt clock",
	.max_adj = BNXT_MAX_PHC_DRIFT,
	.n_alarm = 0,
	.n_ext_ts = 0,
	.n_per_out = 0,
	.n_pins = 0,
	.pps = 0,
	.adjfreq = bnxt_ptp_adjfreq,
	.adjtime = bnxt_ptp_adjtime,
	.do_aux_work = bnxt_ptp_ts_aux_work,
	.gettimex64 = bnxt_ptp_gettimex,
	.settime64 = bnxt_ptp_settime,
	.enable = bnxt_ptp_enable,
	};

	int bnxt_ptp_init(struct bnxt *bp)
	{
	struct bnxt_ptp_cfg *ptp = bp->ptp_cfg;
	int rc;

	if (!ptp)
	return 0;

	rc = bnxt_map_ptp_regs(bp);
	if (rc)
	return rc;

	atomic_set(&ptp->tx_avail, BNXT_MAX_TX_TS);
	spin_lock_init(&ptp->ptp_lock);

	memset(&ptp->cc, 0, sizeof(ptp->cc));
	ptp->cc.read = bnxt_cc_read;
	ptp->cc.mask = CYCLECOUNTER_MASK(48);
	ptp->cc.shift = 0;
	ptp->cc.mult = 1;

	timecounter_init(&ptp->tc, &ptp->cc, ktime_to_ns(ktime_get_real()));

	ptp->ptp_info = bnxt_ptp_caps;
	ptp->ptp_clock = ptp_clock_register(&ptp->ptp_info, &bp->pdev->dev);
	if (IS_ERR(ptp->ptp_clock)) {
	int err = PTR_ERR(ptp->ptp_clock);

	ptp->ptp_clock = NULL;
	bnxt_unmap_ptp_regs(bp);
	return err;
	}
	if (bp->flags & BNXT_FLAG_CHIP_P5) {
	spin_lock_bh(&ptp->ptp_lock);
	ptp->current_time = bnxt_refclk_read(bp, NULL);
	WRITE_ONCE(ptp->old_time, ptp->current_time);
	spin_unlock_bh(&ptp->ptp_lock);
	ptp_schedule_worker(ptp->ptp_clock, 0);
	}
	return 0;
	}

	void bnxt_ptp_clear(struct bnxt *bp)
	{
	struct bnxt_ptp_cfg *ptp = bp->ptp_cfg;

	if (!ptp)
	return;

	if (ptp->ptp_clock)
	ptp_clock_unregister(ptp->ptp_clock);

	ptp->ptp_clock = NULL;
	if (ptp->tx_skb) {
	dev_kfree_skb_any(ptp->tx_skb);
	ptp->tx_skb = NULL;
	}
	bnxt_unmap_ptp_regs(bp);
	}