[linux-2.6-block.git] / drivers / net / ethernet / broadcom / bnxt / bnxt_ptp.c

/* 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;
	if (time_after_eq(now, ptp->next_overflow_check)) {
		spin_lock_bh(&ptp->ptp_lock);
		timecounter_read(&ptp->tc);
		spin_unlock_bh(&ptp->ptp_lock);
		ptp->next_overflow_check = now + BNXT_PHC_OVERFLOW_PERIOD;
	}
	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;

	ptp->next_overflow_check = jiffies + BNXT_PHC_OVERFLOW_PERIOD;
	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);
}
Commit	Line	Data
118612d5 MC	1	/* Broadcom NetXtreme-C/E network driver.
	2	*
	3	* Copyright (c) 2021 Broadcom Inc.
	4	*
	5	* This program is free software; you can redistribute it and/or modify
	6	* it under the terms of the GNU General Public License as published by
	7	* the Free Software Foundation.
	8	*/
	9	#include <linux/kernel.h>
	10	#include <linux/errno.h>
	11	#include <linux/pci.h>
	12	#include <linux/netdevice.h>
	13	#include <linux/etherdevice.h>
	14	#include <linux/ptp_clock_kernel.h>
	15	#include <linux/net_tstamp.h>
	16	#include <linux/timecounter.h>
	17	#include <linux/timekeeping.h>
83bb623c	18	#include <linux/ptp_classify.h>
118612d5 MC	19	#include "bnxt_hsi.h"
	20	#include "bnxt.h"
	21	#include "bnxt_ptp.h"
	22
83bb623c PC	23	int bnxt_ptp_parse(struct sk_buff skb, u16 seq_id)
	24	{
	25	unsigned int ptp_class;
	26	struct ptp_header *hdr;
	27
	28	ptp_class = ptp_classify_raw(skb);
	29
	30	switch (ptp_class & PTP_CLASS_VMASK) {
	31	case PTP_CLASS_V1:
	32	case PTP_CLASS_V2:
	33	hdr = ptp_parse_header(skb, ptp_class);
	34	if (!hdr)
	35	return -EINVAL;
	36
	37	*seq_id = ntohs(hdr->sequence_id);
	38	return 0;
	39	default:
	40	return -ERANGE;
	41	}
	42	}
	43
118612d5 MC	44	static int bnxt_ptp_settime(struct ptp_clock_info *ptp_info,
	45	const struct timespec64 *ts)
	46	{
	47	struct bnxt_ptp_cfg *ptp = container_of(ptp_info, struct bnxt_ptp_cfg,
	48	ptp_info);
	49	u64 ns = timespec64_to_ns(ts);
	50
	51	spin_lock_bh(&ptp->ptp_lock);
	52	timecounter_init(&ptp->tc, &ptp->cc, ns);
	53	spin_unlock_bh(&ptp->ptp_lock);
	54	return 0;
	55	}
	56
	57	/* Caller holds ptp_lock */
	58	static u64 bnxt_refclk_read(struct bnxt bp, struct ptp_system_timestamp sts)
	59	{
	60	struct bnxt_ptp_cfg *ptp = bp->ptp_cfg;
	61	u64 ns;
	62
	63	ptp_read_system_prets(sts);
	64	ns = readl(bp->bar0 + ptp->refclk_mapped_regs[0]);
	65	ptp_read_system_postts(sts);
	66	ns \|= (u64)readl(bp->bar0 + ptp->refclk_mapped_regs[1]) << 32;
	67	return ns;
	68	}
	69
390862f4 PC	70	static void bnxt_ptp_get_current_time(struct bnxt *bp)
	71	{
	72	struct bnxt_ptp_cfg *ptp = bp->ptp_cfg;
	73
	74	if (!ptp)
	75	return;
	76	spin_lock_bh(&ptp->ptp_lock);
	77	WRITE_ONCE(ptp->old_time, ptp->current_time);
	78	ptp->current_time = bnxt_refclk_read(bp, NULL);
	79	spin_unlock_bh(&ptp->ptp_lock);
	80	}
	81
83bb623c PC	82	static int bnxt_hwrm_port_ts_query(struct bnxt bp, u32 flags, u64 ts)
	83	{
	84	struct hwrm_port_ts_query_output *resp = bp->hwrm_cmd_resp_addr;
	85	struct hwrm_port_ts_query_input req = {0};
	86	int rc;
	87
	88	bnxt_hwrm_cmd_hdr_init(bp, &req, HWRM_PORT_TS_QUERY, -1, -1);
	89	req.flags = cpu_to_le32(flags);
	90	if ((flags & PORT_TS_QUERY_REQ_FLAGS_PATH) ==
	91	PORT_TS_QUERY_REQ_FLAGS_PATH_TX) {
	92	req.enables = cpu_to_le16(BNXT_PTP_QTS_TX_ENABLES);
	93	req.ptp_seq_id = cpu_to_le32(bp->ptp_cfg->tx_seqid);
	94	req.ts_req_timeout = cpu_to_le16(BNXT_PTP_QTS_TIMEOUT);
	95	}
	96	mutex_lock(&bp->hwrm_cmd_lock);
	97	rc = _hwrm_send_message(bp, &req, sizeof(req), HWRM_CMD_TIMEOUT);
	98	if (!rc)
	99	*ts = le64_to_cpu(resp->ptp_msg_ts);
	100	mutex_unlock(&bp->hwrm_cmd_lock);
	101	return rc;
	102	}
	103
118612d5 MC	104	static int bnxt_ptp_gettimex(struct ptp_clock_info *ptp_info,
	105	struct timespec64 *ts,
	106	struct ptp_system_timestamp *sts)
	107	{
	108	struct bnxt_ptp_cfg *ptp = container_of(ptp_info, struct bnxt_ptp_cfg,
	109	ptp_info);
	110	u64 ns, cycles;
	111
	112	spin_lock_bh(&ptp->ptp_lock);
	113	cycles = bnxt_refclk_read(ptp->bp, sts);
	114	ns = timecounter_cyc2time(&ptp->tc, cycles);
	115	spin_unlock_bh(&ptp->ptp_lock);
	116	*ts = ns_to_timespec64(ns);
	117
	118	return 0;
	119	}
	120
	121	static int bnxt_ptp_adjtime(struct ptp_clock_info *ptp_info, s64 delta)
	122	{
	123	struct bnxt_ptp_cfg *ptp = container_of(ptp_info, struct bnxt_ptp_cfg,
	124	ptp_info);
	125
	126	spin_lock_bh(&ptp->ptp_lock);
	127	timecounter_adjtime(&ptp->tc, delta);
	128	spin_unlock_bh(&ptp->ptp_lock);
	129	return 0;
	130	}
	131
	132	static int bnxt_ptp_adjfreq(struct ptp_clock_info *ptp_info, s32 ppb)
	133	{
	134	struct bnxt_ptp_cfg *ptp = container_of(ptp_info, struct bnxt_ptp_cfg,
	135	ptp_info);
	136	struct hwrm_port_mac_cfg_input req = {0};
	137	struct bnxt *bp = ptp->bp;
	138	int rc;
	139
	140	bnxt_hwrm_cmd_hdr_init(bp, &req, HWRM_PORT_MAC_CFG, -1, -1);
	141	req.ptp_freq_adj_ppb = cpu_to_le32(ppb);
	142	req.enables = cpu_to_le32(PORT_MAC_CFG_REQ_ENABLES_PTP_FREQ_ADJ_PPB);
	143	rc = hwrm_send_message(bp, &req, sizeof(req), HWRM_CMD_TIMEOUT);
	144	if (rc)
	145	netdev_err(ptp->bp->dev,
	146	"ptp adjfreq failed. rc = %d\n", rc);
	147	return rc;
	148	}
	149
	150	static int bnxt_ptp_enable(struct ptp_clock_info *ptp,
	151	struct ptp_clock_request *rq, int on)
	152	{
	153	return -EOPNOTSUPP;
	154	}
	155
	156	static int bnxt_hwrm_ptp_cfg(struct bnxt *bp)
	157	{
	158	struct hwrm_port_mac_cfg_input req = {0};
	159	struct bnxt_ptp_cfg *ptp = bp->ptp_cfg;
	160	u32 flags = 0;
	161
	162	bnxt_hwrm_cmd_hdr_init(bp, &req, HWRM_PORT_MAC_CFG, -1, -1);
	163	if (ptp->rx_filter)
	164	flags \|= PORT_MAC_CFG_REQ_FLAGS_PTP_RX_TS_CAPTURE_ENABLE;
	165	else
	166	flags \|= PORT_MAC_CFG_REQ_FLAGS_PTP_RX_TS_CAPTURE_DISABLE;
	167	if (ptp->tx_tstamp_en)
168	flags \|= PORT_MAC_CFG_REQ_FLAGS_PTP_TX_TS_CAPTURE_ENABLE;
169	else
170	flags \|= PORT_MAC_CFG_REQ_FLAGS_PTP_TX_TS_CAPTURE_DISABLE;
171	req.flags = cpu_to_le32(flags);
172	req.enables = cpu_to_le32(PORT_MAC_CFG_REQ_ENABLES_RX_TS_CAPTURE_PTP_MSG_TYPE);
173	req.rx_ts_capture_ptp_msg_type = cpu_to_le16(ptp->rxctl);
174
175	return hwrm_send_message(bp, &req, sizeof(req), HWRM_CMD_TIMEOUT);
176	}
177
178	int bnxt_hwtstamp_set(struct net_device dev, struct ifreq ifr)
179	{
180	struct bnxt *bp = netdev_priv(dev);
181	struct hwtstamp_config stmpconf;
182	struct bnxt_ptp_cfg *ptp;
183	u16 old_rxctl;
184	int old_rx_filter, rc;
185	u8 old_tx_tstamp_en;
186
187	ptp = bp->ptp_cfg;
188	if (!ptp)
189	return -EOPNOTSUPP;
190
191	if (copy_from_user(&stmpconf, ifr->ifr_data, sizeof(stmpconf)))
192	return -EFAULT;
193
194	if (stmpconf.flags)
195	return -EINVAL;
196
197	if (stmpconf.tx_type != HWTSTAMP_TX_ON &&
198	stmpconf.tx_type != HWTSTAMP_TX_OFF)
199	return -ERANGE;
200
201	old_rx_filter = ptp->rx_filter;
202	old_rxctl = ptp->rxctl;
203	old_tx_tstamp_en = ptp->tx_tstamp_en;
204	switch (stmpconf.rx_filter) {
205	case HWTSTAMP_FILTER_NONE:
206	ptp->rxctl = 0;
207	ptp->rx_filter = HWTSTAMP_FILTER_NONE;
208	break;
209	case HWTSTAMP_FILTER_PTP_V2_EVENT:
210	case HWTSTAMP_FILTER_PTP_V2_L2_EVENT:
211	case HWTSTAMP_FILTER_PTP_V2_L4_EVENT:
212	ptp->rxctl = BNXT_PTP_MSG_EVENTS;
213	ptp->rx_filter = HWTSTAMP_FILTER_PTP_V2_EVENT;
214	break;
215	case HWTSTAMP_FILTER_PTP_V2_SYNC:
216	case HWTSTAMP_FILTER_PTP_V2_L2_SYNC:
217	case HWTSTAMP_FILTER_PTP_V2_L4_SYNC:
218	ptp->rxctl = BNXT_PTP_MSG_SYNC;
219	ptp->rx_filter = HWTSTAMP_FILTER_PTP_V2_SYNC;
220	break;
221	case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ:
222	case HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ:
223	case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ:
224	ptp->rxctl = BNXT_PTP_MSG_DELAY_REQ;
225	ptp->rx_filter = HWTSTAMP_FILTER_PTP_V2_DELAY_REQ;
226	break;
227	default:
228	return -ERANGE;
229	}
230
231	if (stmpconf.tx_type == HWTSTAMP_TX_ON)
232	ptp->tx_tstamp_en = 1;
233	else
234	ptp->tx_tstamp_en = 0;
235
236	rc = bnxt_hwrm_ptp_cfg(bp);
237	if (rc)
238	goto ts_set_err;
239
240	stmpconf.rx_filter = ptp->rx_filter;
241	return copy_to_user(ifr->ifr_data, &stmpconf, sizeof(stmpconf)) ?
242	-EFAULT : 0;
243
244	ts_set_err:
245	ptp->rx_filter = old_rx_filter;
246	ptp->rxctl = old_rxctl;
247	ptp->tx_tstamp_en = old_tx_tstamp_en;
248	return rc;
249	}
250
251	int bnxt_hwtstamp_get(struct net_device dev, struct ifreq ifr)
252	{
253	struct bnxt *bp = netdev_priv(dev);
254	struct hwtstamp_config stmpconf;
255	struct bnxt_ptp_cfg *ptp;
256
257	ptp = bp->ptp_cfg;
258	if (!ptp)
259	return -EOPNOTSUPP;
260
261	stmpconf.flags = 0;
262	stmpconf.tx_type = ptp->tx_tstamp_en ? HWTSTAMP_TX_ON : HWTSTAMP_TX_OFF;
263
264	stmpconf.rx_filter = ptp->rx_filter;
265	return copy_to_user(ifr->ifr_data, &stmpconf, sizeof(stmpconf)) ?
266	-EFAULT : 0;
267	}
268
269	static int bnxt_map_regs(struct bnxt bp, u32 reg_arr, int count, int reg_win)
270	{
271	u32 reg_base = *reg_arr & BNXT_GRC_BASE_MASK;
272	u32 win_off;
273	int i;
274
275	for (i = 0; i < count; i++) {
276	if ((reg_arr[i] & BNXT_GRC_BASE_MASK) != reg_base)
277	return -ERANGE;
278	}
279	win_off = BNXT_GRCPF_REG_WINDOW_BASE_OUT + (reg_win - 1) * 4;
280	writel(reg_base, bp->bar0 + win_off);
281	return 0;
282	}
283
284	static int bnxt_map_ptp_regs(struct bnxt *bp)
285	{
286	struct bnxt_ptp_cfg *ptp = bp->ptp_cfg;
287	u32 *reg_arr;
288	int rc, i;
289
290	reg_arr = ptp->refclk_regs;
291	if (bp->flags & BNXT_FLAG_CHIP_P5) {
292	rc = bnxt_map_regs(bp, reg_arr, 2, BNXT_PTP_GRC_WIN);
293	if (rc)
294	return rc;
295	for (i = 0; i < 2; i++)
296	ptp->refclk_mapped_regs[i] = BNXT_PTP_GRC_WIN_BASE +
297	(ptp->refclk_regs[i] & BNXT_GRC_OFFSET_MASK);
298	return 0;
299	}
300	return -ENODEV;
301	}
302
303	static void bnxt_unmap_ptp_regs(struct bnxt *bp)
304	{
305	writel(0, bp->bar0 + BNXT_GRCPF_REG_WINDOW_BASE_OUT +
306	(BNXT_PTP_GRC_WIN - 1) * 4);
307	}
308
309	static u64 bnxt_cc_read(const struct cyclecounter *cc)
310	{
311	struct bnxt_ptp_cfg *ptp = container_of(cc, struct bnxt_ptp_cfg, cc);
312
313	return bnxt_refclk_read(ptp->bp, NULL);
314	}
315
83bb623c PC	316	static void bnxt_stamp_tx_skb(struct bnxt bp, struct sk_buff skb)
	317	{
	318	struct bnxt_ptp_cfg *ptp = bp->ptp_cfg;
	319	struct skb_shared_hwtstamps timestamp;
	320	u64 ts = 0, ns = 0;
	321	int rc;
	322
	323	rc = bnxt_hwrm_port_ts_query(bp, PORT_TS_QUERY_REQ_FLAGS_PATH_TX, &ts);
	324	if (!rc) {
	325	memset(&timestamp, 0, sizeof(timestamp));
	326	spin_lock_bh(&ptp->ptp_lock);
	327	ns = timecounter_cyc2time(&ptp->tc, ts);
	328	spin_unlock_bh(&ptp->ptp_lock);
	329	timestamp.hwtstamp = ns_to_ktime(ns);
	330	skb_tstamp_tx(ptp->tx_skb, &timestamp);
	331	} else {
	332	netdev_err(bp->dev, "TS query for TX timer failed rc = %x\n",
	333	rc);
	334	}
	335
	336	dev_kfree_skb_any(ptp->tx_skb);
	337	ptp->tx_skb = NULL;
	338	atomic_inc(&ptp->tx_avail);
	339	}
	340
390862f4 PC	341	static long bnxt_ptp_ts_aux_work(struct ptp_clock_info *ptp_info)
	342	{
	343	struct bnxt_ptp_cfg *ptp = container_of(ptp_info, struct bnxt_ptp_cfg,
	344	ptp_info);
83bb623c	345	unsigned long now = jiffies;
390862f4 PC	346	struct bnxt *bp = ptp->bp;
390862f4 PC	347
83bb623c PC	348	if (ptp->tx_skb)
	349	bnxt_stamp_tx_skb(bp, ptp->tx_skb);
	350
	351	if (!time_after_eq(now, ptp->next_period))
	352	return ptp->next_period - now;
	353
390862f4	354	bnxt_ptp_get_current_time(bp);
83bb623c	355	ptp->next_period = now + HZ;
89bc7f45 MC	356	if (time_after_eq(now, ptp->next_overflow_check)) {
	357	spin_lock_bh(&ptp->ptp_lock);
	358	timecounter_read(&ptp->tc);
	359	spin_unlock_bh(&ptp->ptp_lock);
	360	ptp->next_overflow_check = now + BNXT_PHC_OVERFLOW_PERIOD;
	361	}
390862f4 PC	362	return HZ;
	363	}
	364
83bb623c PC	365	int bnxt_get_tx_ts_p5(struct bnxt bp, struct sk_buff skb)
	366	{
	367	struct bnxt_ptp_cfg *ptp = bp->ptp_cfg;
	368
	369	if (ptp->tx_skb) {
	370	netdev_err(bp->dev, "deferring skb:one SKB is still outstanding\n");
	371	return -EBUSY;
	372	}
	373	ptp->tx_skb = skb;
	374	ptp_schedule_worker(ptp->ptp_clock, 0);
	375	return 0;
	376	}
	377
7f5515d1 PC	378	int bnxt_get_rx_ts_p5(struct bnxt bp, u64 ts, u32 pkt_ts)
	379	{
	380	struct bnxt_ptp_cfg *ptp = bp->ptp_cfg;
	381	u64 time;
	382
	383	if (!ptp)
	384	return -ENODEV;
	385
	386	BNXT_READ_TIME64(ptp, time, ptp->old_time);
	387	*ts = (time & BNXT_HI_TIMER_MASK) \| pkt_ts;
	388	if (pkt_ts < (time & BNXT_LO_TIMER_MASK))
	389	*ts += BNXT_LO_TIMER_MASK + 1;
	390
	391	return 0;
	392	}
	393
118612d5 MC	394	static const struct ptp_clock_info bnxt_ptp_caps = {
	395	.owner = THIS_MODULE,
	396	.name = "bnxt clock",
	397	.max_adj = BNXT_MAX_PHC_DRIFT,
	398	.n_alarm = 0,
	399	.n_ext_ts = 0,
	400	.n_per_out = 0,
	401	.n_pins = 0,
	402	.pps = 0,
	403	.adjfreq = bnxt_ptp_adjfreq,
	404	.adjtime = bnxt_ptp_adjtime,
390862f4	405	.do_aux_work = bnxt_ptp_ts_aux_work,
118612d5 MC	406	.gettimex64 = bnxt_ptp_gettimex,
	407	.settime64 = bnxt_ptp_settime,
	408	.enable = bnxt_ptp_enable,
	409	};
	410
	411	int bnxt_ptp_init(struct bnxt *bp)
	412	{
	413	struct bnxt_ptp_cfg *ptp = bp->ptp_cfg;
	414	int rc;
	415
	416	if (!ptp)
	417	return 0;
	418
	419	rc = bnxt_map_ptp_regs(bp);
	420	if (rc)
	421	return rc;
	422
	423	atomic_set(&ptp->tx_avail, BNXT_MAX_TX_TS);
	424	spin_lock_init(&ptp->ptp_lock);
	425
	426	memset(&ptp->cc, 0, sizeof(ptp->cc));
	427	ptp->cc.read = bnxt_cc_read;
	428	ptp->cc.mask = CYCLECOUNTER_MASK(48);
	429	ptp->cc.shift = 0;
	430	ptp->cc.mult = 1;
	431
89bc7f45	432	ptp->next_overflow_check = jiffies + BNXT_PHC_OVERFLOW_PERIOD;
118612d5 MC	433	timecounter_init(&ptp->tc, &ptp->cc, ktime_to_ns(ktime_get_real()));
	434
	435	ptp->ptp_info = bnxt_ptp_caps;
	436	ptp->ptp_clock = ptp_clock_register(&ptp->ptp_info, &bp->pdev->dev);
	437	if (IS_ERR(ptp->ptp_clock)) {
	438	int err = PTR_ERR(ptp->ptp_clock);
	439
	440	ptp->ptp_clock = NULL;
	441	bnxt_unmap_ptp_regs(bp);
	442	return err;
	443	}
d7859afb MC	444	if (bp->flags & BNXT_FLAG_CHIP_P5) {
	445	spin_lock_bh(&ptp->ptp_lock);
	446	ptp->current_time = bnxt_refclk_read(bp, NULL);
	447	WRITE_ONCE(ptp->old_time, ptp->current_time);
	448	spin_unlock_bh(&ptp->ptp_lock);
	449	ptp_schedule_worker(ptp->ptp_clock, 0);
	450	}
118612d5 MC	451	return 0;
	452	}
	453
	454	void bnxt_ptp_clear(struct bnxt *bp)
	455	{
	456	struct bnxt_ptp_cfg *ptp = bp->ptp_cfg;
	457
	458	if (!ptp)
	459	return;
	460
	461	if (ptp->ptp_clock)
	462	ptp_clock_unregister(ptp->ptp_clock);
	463
	464	ptp->ptp_clock = NULL;
83bb623c PC	465	if (ptp->tx_skb) {
	466	dev_kfree_skb_any(ptp->tx_skb);
	467	ptp->tx_skb = NULL;
	468	}
118612d5 MC	469	bnxt_unmap_ptp_regs(bp);
118612d5 MC	470	}