[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 "bnxt_hsi.h"
#include "bnxt.h"
#include "bnxt_ptp.h"

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_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 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);
	struct bnxt *bp = ptp->bp;

	bnxt_ptp_get_current_time(bp);
	return HZ;
}

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

	if (!ptp)
		return;

	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);
	}
}

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;
	}

	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;
	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>
	18	#include "bnxt_hsi.h"
	19	#include "bnxt.h"
	20	#include "bnxt_ptp.h"
	21
	22	static int bnxt_ptp_settime(struct ptp_clock_info *ptp_info,
	23	const struct timespec64 *ts)
	24	{
	25	struct bnxt_ptp_cfg *ptp = container_of(ptp_info, struct bnxt_ptp_cfg,
	26	ptp_info);
	27	u64 ns = timespec64_to_ns(ts);
	28
	29	spin_lock_bh(&ptp->ptp_lock);
	30	timecounter_init(&ptp->tc, &ptp->cc, ns);
	31	spin_unlock_bh(&ptp->ptp_lock);
	32	return 0;
	33	}
	34
	35	/* Caller holds ptp_lock */
	36	static u64 bnxt_refclk_read(struct bnxt bp, struct ptp_system_timestamp sts)
	37	{
	38	struct bnxt_ptp_cfg *ptp = bp->ptp_cfg;
	39	u64 ns;
	40
	41	ptp_read_system_prets(sts);
	42	ns = readl(bp->bar0 + ptp->refclk_mapped_regs[0]);
	43	ptp_read_system_postts(sts);
	44	ns \|= (u64)readl(bp->bar0 + ptp->refclk_mapped_regs[1]) << 32;
	45	return ns;
	46	}
	47
390862f4 PC	48	static void bnxt_ptp_get_current_time(struct bnxt *bp)
	49	{
	50	struct bnxt_ptp_cfg *ptp = bp->ptp_cfg;
	51
	52	if (!ptp)
	53	return;
	54	spin_lock_bh(&ptp->ptp_lock);
	55	WRITE_ONCE(ptp->old_time, ptp->current_time);
	56	ptp->current_time = bnxt_refclk_read(bp, NULL);
	57	spin_unlock_bh(&ptp->ptp_lock);
	58	}
	59
118612d5 MC	60	static int bnxt_ptp_gettimex(struct ptp_clock_info *ptp_info,
	61	struct timespec64 *ts,
	62	struct ptp_system_timestamp *sts)
	63	{
	64	struct bnxt_ptp_cfg *ptp = container_of(ptp_info, struct bnxt_ptp_cfg,
	65	ptp_info);
	66	u64 ns, cycles;
	67
	68	spin_lock_bh(&ptp->ptp_lock);
	69	cycles = bnxt_refclk_read(ptp->bp, sts);
	70	ns = timecounter_cyc2time(&ptp->tc, cycles);
	71	spin_unlock_bh(&ptp->ptp_lock);
	72	*ts = ns_to_timespec64(ns);
	73
	74	return 0;
	75	}
	76
	77	static int bnxt_ptp_adjtime(struct ptp_clock_info *ptp_info, s64 delta)
	78	{
	79	struct bnxt_ptp_cfg *ptp = container_of(ptp_info, struct bnxt_ptp_cfg,
	80	ptp_info);
	81
	82	spin_lock_bh(&ptp->ptp_lock);
	83	timecounter_adjtime(&ptp->tc, delta);
	84	spin_unlock_bh(&ptp->ptp_lock);
	85	return 0;
	86	}
	87
	88	static int bnxt_ptp_adjfreq(struct ptp_clock_info *ptp_info, s32 ppb)
	89	{
	90	struct bnxt_ptp_cfg *ptp = container_of(ptp_info, struct bnxt_ptp_cfg,
	91	ptp_info);
	92	struct hwrm_port_mac_cfg_input req = {0};
	93	struct bnxt *bp = ptp->bp;
	94	int rc;
	95
	96	bnxt_hwrm_cmd_hdr_init(bp, &req, HWRM_PORT_MAC_CFG, -1, -1);
	97	req.ptp_freq_adj_ppb = cpu_to_le32(ppb);
	98	req.enables = cpu_to_le32(PORT_MAC_CFG_REQ_ENABLES_PTP_FREQ_ADJ_PPB);
	99	rc = hwrm_send_message(bp, &req, sizeof(req), HWRM_CMD_TIMEOUT);
	100	if (rc)
	101	netdev_err(ptp->bp->dev,
	102	"ptp adjfreq failed. rc = %d\n", rc);
	103	return rc;
	104	}
	105
	106	static int bnxt_ptp_enable(struct ptp_clock_info *ptp,
	107	struct ptp_clock_request *rq, int on)
	108	{
	109	return -EOPNOTSUPP;
	110	}
	111
	112	static int bnxt_hwrm_ptp_cfg(struct bnxt *bp)
	113	{
	114	struct hwrm_port_mac_cfg_input req = {0};
	115	struct bnxt_ptp_cfg *ptp = bp->ptp_cfg;
	116	u32 flags = 0;
	117
	118	bnxt_hwrm_cmd_hdr_init(bp, &req, HWRM_PORT_MAC_CFG, -1, -1);
	119	if (ptp->rx_filter)
	120	flags \|= PORT_MAC_CFG_REQ_FLAGS_PTP_RX_TS_CAPTURE_ENABLE;
	121	else
	122	flags \|= PORT_MAC_CFG_REQ_FLAGS_PTP_RX_TS_CAPTURE_DISABLE;
	123	if (ptp->tx_tstamp_en)
124	flags \|= PORT_MAC_CFG_REQ_FLAGS_PTP_TX_TS_CAPTURE_ENABLE;
125	else
126	flags \|= PORT_MAC_CFG_REQ_FLAGS_PTP_TX_TS_CAPTURE_DISABLE;
127	req.flags = cpu_to_le32(flags);
128	req.enables = cpu_to_le32(PORT_MAC_CFG_REQ_ENABLES_RX_TS_CAPTURE_PTP_MSG_TYPE);
129	req.rx_ts_capture_ptp_msg_type = cpu_to_le16(ptp->rxctl);
130
131	return hwrm_send_message(bp, &req, sizeof(req), HWRM_CMD_TIMEOUT);
132	}
133
134	int bnxt_hwtstamp_set(struct net_device dev, struct ifreq ifr)
135	{
136	struct bnxt *bp = netdev_priv(dev);
137	struct hwtstamp_config stmpconf;
138	struct bnxt_ptp_cfg *ptp;
139	u16 old_rxctl;
140	int old_rx_filter, rc;
141	u8 old_tx_tstamp_en;
142
143	ptp = bp->ptp_cfg;
144	if (!ptp)
145	return -EOPNOTSUPP;
146
147	if (copy_from_user(&stmpconf, ifr->ifr_data, sizeof(stmpconf)))
148	return -EFAULT;
149
150	if (stmpconf.flags)
151	return -EINVAL;
152
153	if (stmpconf.tx_type != HWTSTAMP_TX_ON &&
154	stmpconf.tx_type != HWTSTAMP_TX_OFF)
155	return -ERANGE;
156
157	old_rx_filter = ptp->rx_filter;
158	old_rxctl = ptp->rxctl;
159	old_tx_tstamp_en = ptp->tx_tstamp_en;
160	switch (stmpconf.rx_filter) {
161	case HWTSTAMP_FILTER_NONE:
162	ptp->rxctl = 0;
163	ptp->rx_filter = HWTSTAMP_FILTER_NONE;
164	break;
165	case HWTSTAMP_FILTER_PTP_V2_EVENT:
166	case HWTSTAMP_FILTER_PTP_V2_L2_EVENT:
167	case HWTSTAMP_FILTER_PTP_V2_L4_EVENT:
168	ptp->rxctl = BNXT_PTP_MSG_EVENTS;
169	ptp->rx_filter = HWTSTAMP_FILTER_PTP_V2_EVENT;
170	break;
171	case HWTSTAMP_FILTER_PTP_V2_SYNC:
172	case HWTSTAMP_FILTER_PTP_V2_L2_SYNC:
173	case HWTSTAMP_FILTER_PTP_V2_L4_SYNC:
174	ptp->rxctl = BNXT_PTP_MSG_SYNC;
175	ptp->rx_filter = HWTSTAMP_FILTER_PTP_V2_SYNC;
176	break;
177	case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ:
178	case HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ:
179	case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ:
180	ptp->rxctl = BNXT_PTP_MSG_DELAY_REQ;
181	ptp->rx_filter = HWTSTAMP_FILTER_PTP_V2_DELAY_REQ;
182	break;
183	default:
184	return -ERANGE;
185	}
186
187	if (stmpconf.tx_type == HWTSTAMP_TX_ON)
188	ptp->tx_tstamp_en = 1;
189	else
190	ptp->tx_tstamp_en = 0;
191
192	rc = bnxt_hwrm_ptp_cfg(bp);
193	if (rc)
194	goto ts_set_err;
195
196	stmpconf.rx_filter = ptp->rx_filter;
197	return copy_to_user(ifr->ifr_data, &stmpconf, sizeof(stmpconf)) ?
198	-EFAULT : 0;
199
200	ts_set_err:
201	ptp->rx_filter = old_rx_filter;
202	ptp->rxctl = old_rxctl;
203	ptp->tx_tstamp_en = old_tx_tstamp_en;
204	return rc;
205	}
206
207	int bnxt_hwtstamp_get(struct net_device dev, struct ifreq ifr)
208	{
209	struct bnxt *bp = netdev_priv(dev);
210	struct hwtstamp_config stmpconf;
211	struct bnxt_ptp_cfg *ptp;
212
213	ptp = bp->ptp_cfg;
214	if (!ptp)
215	return -EOPNOTSUPP;
216
217	stmpconf.flags = 0;
218	stmpconf.tx_type = ptp->tx_tstamp_en ? HWTSTAMP_TX_ON : HWTSTAMP_TX_OFF;
219
220	stmpconf.rx_filter = ptp->rx_filter;
221	return copy_to_user(ifr->ifr_data, &stmpconf, sizeof(stmpconf)) ?
222	-EFAULT : 0;
223	}
224
225	static int bnxt_map_regs(struct bnxt bp, u32 reg_arr, int count, int reg_win)
226	{
227	u32 reg_base = *reg_arr & BNXT_GRC_BASE_MASK;
228	u32 win_off;
229	int i;
230
231	for (i = 0; i < count; i++) {
232	if ((reg_arr[i] & BNXT_GRC_BASE_MASK) != reg_base)
233	return -ERANGE;
234	}
235	win_off = BNXT_GRCPF_REG_WINDOW_BASE_OUT + (reg_win - 1) * 4;
236	writel(reg_base, bp->bar0 + win_off);
237	return 0;
238	}
239
240	static int bnxt_map_ptp_regs(struct bnxt *bp)
241	{
242	struct bnxt_ptp_cfg *ptp = bp->ptp_cfg;
243	u32 *reg_arr;
244	int rc, i;
245
246	reg_arr = ptp->refclk_regs;
247	if (bp->flags & BNXT_FLAG_CHIP_P5) {
248	rc = bnxt_map_regs(bp, reg_arr, 2, BNXT_PTP_GRC_WIN);
249	if (rc)
250	return rc;
251	for (i = 0; i < 2; i++)
252	ptp->refclk_mapped_regs[i] = BNXT_PTP_GRC_WIN_BASE +
253	(ptp->refclk_regs[i] & BNXT_GRC_OFFSET_MASK);
254	return 0;
255	}
256	return -ENODEV;
257	}
258
259	static void bnxt_unmap_ptp_regs(struct bnxt *bp)
260	{
261	writel(0, bp->bar0 + BNXT_GRCPF_REG_WINDOW_BASE_OUT +
262	(BNXT_PTP_GRC_WIN - 1) * 4);
263	}
264
265	static u64 bnxt_cc_read(const struct cyclecounter *cc)
266	{
267	struct bnxt_ptp_cfg *ptp = container_of(cc, struct bnxt_ptp_cfg, cc);
268
269	return bnxt_refclk_read(ptp->bp, NULL);
270	}
271
390862f4 PC	272	static long bnxt_ptp_ts_aux_work(struct ptp_clock_info *ptp_info)
	273	{
	274	struct bnxt_ptp_cfg *ptp = container_of(ptp_info, struct bnxt_ptp_cfg,
	275	ptp_info);
	276	struct bnxt *bp = ptp->bp;
	277
	278	bnxt_ptp_get_current_time(bp);
	279	return HZ;
	280	}
	281
	282	void bnxt_ptp_start(struct bnxt *bp)
	283	{
	284	struct bnxt_ptp_cfg *ptp = bp->ptp_cfg;
	285
	286	if (!ptp)
	287	return;
	288
	289	if (bp->flags & BNXT_FLAG_CHIP_P5) {
	290	spin_lock_bh(&ptp->ptp_lock);
	291	ptp->current_time = bnxt_refclk_read(bp, NULL);
	292	WRITE_ONCE(ptp->old_time, ptp->current_time);
	293	spin_unlock_bh(&ptp->ptp_lock);
	294	ptp_schedule_worker(ptp->ptp_clock, 0);
	295	}
	296	}
	297
118612d5 MC	298	static const struct ptp_clock_info bnxt_ptp_caps = {
	299	.owner = THIS_MODULE,
	300	.name = "bnxt clock",
	301	.max_adj = BNXT_MAX_PHC_DRIFT,
	302	.n_alarm = 0,
	303	.n_ext_ts = 0,
	304	.n_per_out = 0,
	305	.n_pins = 0,
	306	.pps = 0,
	307	.adjfreq = bnxt_ptp_adjfreq,
	308	.adjtime = bnxt_ptp_adjtime,
390862f4	309	.do_aux_work = bnxt_ptp_ts_aux_work,
118612d5 MC	310	.gettimex64 = bnxt_ptp_gettimex,
	311	.settime64 = bnxt_ptp_settime,
	312	.enable = bnxt_ptp_enable,
	313	};
	314
	315	int bnxt_ptp_init(struct bnxt *bp)
	316	{
	317	struct bnxt_ptp_cfg *ptp = bp->ptp_cfg;
	318	int rc;
	319
	320	if (!ptp)
	321	return 0;
	322
	323	rc = bnxt_map_ptp_regs(bp);
	324	if (rc)
	325	return rc;
	326
	327	atomic_set(&ptp->tx_avail, BNXT_MAX_TX_TS);
	328	spin_lock_init(&ptp->ptp_lock);
	329
	330	memset(&ptp->cc, 0, sizeof(ptp->cc));
	331	ptp->cc.read = bnxt_cc_read;
	332	ptp->cc.mask = CYCLECOUNTER_MASK(48);
	333	ptp->cc.shift = 0;
	334	ptp->cc.mult = 1;
	335
	336	timecounter_init(&ptp->tc, &ptp->cc, ktime_to_ns(ktime_get_real()));
	337
	338	ptp->ptp_info = bnxt_ptp_caps;
	339	ptp->ptp_clock = ptp_clock_register(&ptp->ptp_info, &bp->pdev->dev);
	340	if (IS_ERR(ptp->ptp_clock)) {
	341	int err = PTR_ERR(ptp->ptp_clock);
	342
	343	ptp->ptp_clock = NULL;
	344	bnxt_unmap_ptp_regs(bp);
	345	return err;
	346	}
	347
	348	return 0;
	349	}
	350
	351	void bnxt_ptp_clear(struct bnxt *bp)
	352	{
	353	struct bnxt_ptp_cfg *ptp = bp->ptp_cfg;
	354
	355	if (!ptp)
	356	return;
	357
	358	if (ptp->ptp_clock)
	359	ptp_clock_unregister(ptp->ptp_clock);
	360
	361	ptp->ptp_clock = NULL;
	362	bnxt_unmap_ptp_regs(bp);
	363	}