[linux-block.git] / drivers / ptp / ptp_chardev.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * PTP 1588 clock support - character device implementation.
 *
 * Copyright (C) 2010 OMICRON electronics GmbH
 */
#include <linux/module.h>
#include <linux/posix-clock.h>
#include <linux/poll.h>
#include <linux/sched.h>
#include <linux/slab.h>
#include <linux/timekeeping.h>

#include <linux/nospec.h>

#include "ptp_private.h"

static int ptp_disable_pinfunc(struct ptp_clock_info *ops,
			       enum ptp_pin_function func, unsigned int chan)
{
	struct ptp_clock_request rq;
	int err = 0;

	memset(&rq, 0, sizeof(rq));

	switch (func) {
	case PTP_PF_NONE:
		break;
	case PTP_PF_EXTTS:
		rq.type = PTP_CLK_REQ_EXTTS;
		rq.extts.index = chan;
		err = ops->enable(ops, &rq, 0);
		break;
	case PTP_PF_PEROUT:
		rq.type = PTP_CLK_REQ_PEROUT;
		rq.perout.index = chan;
		err = ops->enable(ops, &rq, 0);
		break;
	case PTP_PF_PHYSYNC:
		break;
	default:
		return -EINVAL;
	}

	return err;
}

int ptp_set_pinfunc(struct ptp_clock *ptp, unsigned int pin,
		    enum ptp_pin_function func, unsigned int chan)
{
	struct ptp_clock_info *info = ptp->info;
	struct ptp_pin_desc *pin1 = NULL, *pin2 = &info->pin_config[pin];
	unsigned int i;

	/* Check to see if any other pin previously had this function. */
	for (i = 0; i < info->n_pins; i++) {
		if (info->pin_config[i].func == func &&
		    info->pin_config[i].chan == chan) {
			pin1 = &info->pin_config[i];
			break;
		}
	}
	if (pin1 && i == pin)
		return 0;

	/* Check the desired function and channel. */
	switch (func) {
	case PTP_PF_NONE:
		break;
	case PTP_PF_EXTTS:
		if (chan >= info->n_ext_ts)
			return -EINVAL;
		break;
	case PTP_PF_PEROUT:
		if (chan >= info->n_per_out)
			return -EINVAL;
		break;
	case PTP_PF_PHYSYNC:
		if (chan != 0)
			return -EINVAL;
		break;
	default:
		return -EINVAL;
	}

	if (info->verify(info, pin, func, chan)) {
		pr_err("driver cannot use function %u on pin %u\n", func, chan);
		return -EOPNOTSUPP;
	}

	/* Disable whatever function was previously assigned. */
	if (pin1) {
		ptp_disable_pinfunc(info, func, chan);
		pin1->func = PTP_PF_NONE;
		pin1->chan = 0;
	}
	ptp_disable_pinfunc(info, pin2->func, pin2->chan);
	pin2->func = func;
	pin2->chan = chan;

	return 0;
}

int ptp_open(struct posix_clock *pc, fmode_t fmode)
{
	return 0;
}

long ptp_ioctl(struct posix_clock *pc, unsigned int cmd, unsigned long arg)
{
	struct ptp_clock *ptp = container_of(pc, struct ptp_clock, clock);
	struct ptp_sys_offset_extended *extoff = NULL;
	struct ptp_sys_offset_precise precise_offset;
	struct system_device_crosststamp xtstamp;
	struct ptp_clock_info *ops = ptp->info;
	struct ptp_sys_offset *sysoff = NULL;
	struct ptp_system_timestamp sts;
	struct ptp_clock_request req;
	struct ptp_clock_caps caps;
	struct ptp_clock_time *pct;
	unsigned int i, pin_index;
	struct ptp_pin_desc pd;
	struct timespec64 ts;
	int enable, err = 0;

	switch (cmd) {

	case PTP_CLOCK_GETCAPS:
	case PTP_CLOCK_GETCAPS2:
		memset(&caps, 0, sizeof(caps));

		caps.max_adj = ptp->info->max_adj;
		caps.n_alarm = ptp->info->n_alarm;
		caps.n_ext_ts = ptp->info->n_ext_ts;
		caps.n_per_out = ptp->info->n_per_out;
		caps.pps = ptp->info->pps;
		caps.n_pins = ptp->info->n_pins;
		caps.cross_timestamping = ptp->info->getcrosststamp != NULL;
		caps.adjust_phase = ptp->info->adjphase != NULL;
		if (copy_to_user((void __user *)arg, &caps, sizeof(caps)))
			err = -EFAULT;
		break;

	case PTP_EXTTS_REQUEST:
	case PTP_EXTTS_REQUEST2:
		memset(&req, 0, sizeof(req));

		if (copy_from_user(&req.extts, (void __user *)arg,
				   sizeof(req.extts))) {
			err = -EFAULT;
			break;
		}
		if (cmd == PTP_EXTTS_REQUEST2) {
			/* Tell the drivers to check the flags carefully. */
			req.extts.flags |= PTP_STRICT_FLAGS;
			/* Make sure no reserved bit is set. */
			if ((req.extts.flags & ~PTP_EXTTS_VALID_FLAGS) ||
			    req.extts.rsv[0] || req.extts.rsv[1]) {
				err = -EINVAL;
				break;
			}
			/* Ensure one of the rising/falling edge bits is set. */
			if ((req.extts.flags & PTP_ENABLE_FEATURE) &&
			    (req.extts.flags & PTP_EXTTS_EDGES) == 0) {
				err = -EINVAL;
				break;
			}
		} else if (cmd == PTP_EXTTS_REQUEST) {
			req.extts.flags &= PTP_EXTTS_V1_VALID_FLAGS;
			req.extts.rsv[0] = 0;
			req.extts.rsv[1] = 0;
		}
		if (req.extts.index >= ops->n_ext_ts) {
			err = -EINVAL;
			break;
		}
		req.type = PTP_CLK_REQ_EXTTS;
		enable = req.extts.flags & PTP_ENABLE_FEATURE ? 1 : 0;
		if (mutex_lock_interruptible(&ptp->pincfg_mux))
			return -ERESTARTSYS;
		err = ops->enable(ops, &req, enable);
		mutex_unlock(&ptp->pincfg_mux);
		break;

	case PTP_PEROUT_REQUEST:
	case PTP_PEROUT_REQUEST2:
		memset(&req, 0, sizeof(req));

		if (copy_from_user(&req.perout, (void __user *)arg,
				   sizeof(req.perout))) {
			err = -EFAULT;
			break;
		}
		if (cmd == PTP_PEROUT_REQUEST2) {
			struct ptp_perout_request *perout = &req.perout;

			if (perout->flags & ~PTP_PEROUT_VALID_FLAGS) {
				err = -EINVAL;
				break;
			}
			/*
			 * The "on" field has undefined meaning if
			 * PTP_PEROUT_DUTY_CYCLE isn't set, we must still treat
			 * it as reserved, which must be set to zero.
			 */
			if (!(perout->flags & PTP_PEROUT_DUTY_CYCLE) &&
			    (perout->rsv[0] || perout->rsv[1] ||
			     perout->rsv[2] || perout->rsv[3])) {
				err = -EINVAL;
				break;
			}
			if (perout->flags & PTP_PEROUT_DUTY_CYCLE) {
				/* The duty cycle must be subunitary. */
				if (perout->on.sec > perout->period.sec ||
				    (perout->on.sec == perout->period.sec &&
				     perout->on.nsec > perout->period.nsec)) {
					err = -ERANGE;
					break;
				}
			}
			if (perout->flags & PTP_PEROUT_PHASE) {
				/*
				 * The phase should be specified modulo the
				 * period, therefore anything equal or larger
				 * than 1 period is invalid.
				 */
				if (perout->phase.sec > perout->period.sec ||
				    (perout->phase.sec == perout->period.sec &&
				     perout->phase.nsec >= perout->period.nsec)) {
					err = -ERANGE;
					break;
				}
			}
		} else if (cmd == PTP_PEROUT_REQUEST) {
			req.perout.flags &= PTP_PEROUT_V1_VALID_FLAGS;
			req.perout.rsv[0] = 0;
			req.perout.rsv[1] = 0;
			req.perout.rsv[2] = 0;
			req.perout.rsv[3] = 0;
		}
		if (req.perout.index >= ops->n_per_out) {
			err = -EINVAL;
			break;
		}
		req.type = PTP_CLK_REQ_PEROUT;
		enable = req.perout.period.sec || req.perout.period.nsec;
		if (mutex_lock_interruptible(&ptp->pincfg_mux))
			return -ERESTARTSYS;
		err = ops->enable(ops, &req, enable);
		mutex_unlock(&ptp->pincfg_mux);
		break;

	case PTP_ENABLE_PPS:
	case PTP_ENABLE_PPS2:
		memset(&req, 0, sizeof(req));

		if (!capable(CAP_SYS_TIME))
			return -EPERM;
		req.type = PTP_CLK_REQ_PPS;
		enable = arg ? 1 : 0;
		if (mutex_lock_interruptible(&ptp->pincfg_mux))
			return -ERESTARTSYS;
		err = ops->enable(ops, &req, enable);
		mutex_unlock(&ptp->pincfg_mux);
		break;

	case PTP_SYS_OFFSET_PRECISE:
	case PTP_SYS_OFFSET_PRECISE2:
		if (!ptp->info->getcrosststamp) {
			err = -EOPNOTSUPP;
			break;
		}
		err = ptp->info->getcrosststamp(ptp->info, &xtstamp);
		if (err)
			break;

		memset(&precise_offset, 0, sizeof(precise_offset));
		ts = ktime_to_timespec64(xtstamp.device);
		precise_offset.device.sec = ts.tv_sec;
		precise_offset.device.nsec = ts.tv_nsec;
		ts = ktime_to_timespec64(xtstamp.sys_realtime);
		precise_offset.sys_realtime.sec = ts.tv_sec;
		precise_offset.sys_realtime.nsec = ts.tv_nsec;
		ts = ktime_to_timespec64(xtstamp.sys_monoraw);
		precise_offset.sys_monoraw.sec = ts.tv_sec;
		precise_offset.sys_monoraw.nsec = ts.tv_nsec;
		if (copy_to_user((void __user *)arg, &precise_offset,
				 sizeof(precise_offset)))
			err = -EFAULT;
		break;

	case PTP_SYS_OFFSET_EXTENDED:
	case PTP_SYS_OFFSET_EXTENDED2:
		if (!ptp->info->gettimex64) {
			err = -EOPNOTSUPP;
			break;
		}
		extoff = memdup_user((void __user *)arg, sizeof(*extoff));
		if (IS_ERR(extoff)) {
			err = PTR_ERR(extoff);
			extoff = NULL;
			break;
		}
		if (extoff->n_samples > PTP_MAX_SAMPLES
		    || extoff->rsv[0] || extoff->rsv[1] || extoff->rsv[2]) {
			err = -EINVAL;
			break;
		}
		for (i = 0; i < extoff->n_samples; i++) {
			err = ptp->info->gettimex64(ptp->info, &ts, &sts);
			if (err)
				goto out;
			extoff->ts[i][0].sec = sts.pre_ts.tv_sec;
			extoff->ts[i][0].nsec = sts.pre_ts.tv_nsec;
			extoff->ts[i][1].sec = ts.tv_sec;
			extoff->ts[i][1].nsec = ts.tv_nsec;
			extoff->ts[i][2].sec = sts.post_ts.tv_sec;
			extoff->ts[i][2].nsec = sts.post_ts.tv_nsec;
		}
		if (copy_to_user((void __user *)arg, extoff, sizeof(*extoff)))
			err = -EFAULT;
		break;

	case PTP_SYS_OFFSET:
	case PTP_SYS_OFFSET2:
		sysoff = memdup_user((void __user *)arg, sizeof(*sysoff));
		if (IS_ERR(sysoff)) {
			err = PTR_ERR(sysoff);
			sysoff = NULL;
			break;
		}
		if (sysoff->n_samples > PTP_MAX_SAMPLES) {
			err = -EINVAL;
			break;
		}
		pct = &sysoff->ts[0];
		for (i = 0; i < sysoff->n_samples; i++) {
			ktime_get_real_ts64(&ts);
			pct->sec = ts.tv_sec;
			pct->nsec = ts.tv_nsec;
			pct++;
			if (ops->gettimex64)
				err = ops->gettimex64(ops, &ts, NULL);
			else
				err = ops->gettime64(ops, &ts);
			if (err)
				goto out;
			pct->sec = ts.tv_sec;
			pct->nsec = ts.tv_nsec;
			pct++;
		}
		ktime_get_real_ts64(&ts);
		pct->sec = ts.tv_sec;
		pct->nsec = ts.tv_nsec;
		if (copy_to_user((void __user *)arg, sysoff, sizeof(*sysoff)))
			err = -EFAULT;
		break;

	case PTP_PIN_GETFUNC:
	case PTP_PIN_GETFUNC2:
		if (copy_from_user(&pd, (void __user *)arg, sizeof(pd))) {
			err = -EFAULT;
			break;
		}
		if ((pd.rsv[0] || pd.rsv[1] || pd.rsv[2]
				|| pd.rsv[3] || pd.rsv[4])
			&& cmd == PTP_PIN_GETFUNC2) {
			err = -EINVAL;
			break;
		} else if (cmd == PTP_PIN_GETFUNC) {
			pd.rsv[0] = 0;
			pd.rsv[1] = 0;
			pd.rsv[2] = 0;
			pd.rsv[3] = 0;
			pd.rsv[4] = 0;
		}
		pin_index = pd.index;
		if (pin_index >= ops->n_pins) {
			err = -EINVAL;
			break;
		}
		pin_index = array_index_nospec(pin_index, ops->n_pins);
		if (mutex_lock_interruptible(&ptp->pincfg_mux))
			return -ERESTARTSYS;
		pd = ops->pin_config[pin_index];
		mutex_unlock(&ptp->pincfg_mux);
		if (!err && copy_to_user((void __user *)arg, &pd, sizeof(pd)))
			err = -EFAULT;
		break;

	case PTP_PIN_SETFUNC:
	case PTP_PIN_SETFUNC2:
		if (copy_from_user(&pd, (void __user *)arg, sizeof(pd))) {
			err = -EFAULT;
			break;
		}
		if ((pd.rsv[0] || pd.rsv[1] || pd.rsv[2]
				|| pd.rsv[3] || pd.rsv[4])
			&& cmd == PTP_PIN_SETFUNC2) {
			err = -EINVAL;
			break;
		} else if (cmd == PTP_PIN_SETFUNC) {
			pd.rsv[0] = 0;
			pd.rsv[1] = 0;
			pd.rsv[2] = 0;
			pd.rsv[3] = 0;
			pd.rsv[4] = 0;
		}
		pin_index = pd.index;
		if (pin_index >= ops->n_pins) {
			err = -EINVAL;
			break;
		}
		pin_index = array_index_nospec(pin_index, ops->n_pins);
		if (mutex_lock_interruptible(&ptp->pincfg_mux))
			return -ERESTARTSYS;
		err = ptp_set_pinfunc(ptp, pin_index, pd.func, pd.chan);
		mutex_unlock(&ptp->pincfg_mux);
		break;

	default:
		err = -ENOTTY;
		break;
	}

out:
	kfree(extoff);
	kfree(sysoff);
	return err;
}

__poll_t ptp_poll(struct posix_clock *pc, struct file *fp, poll_table *wait)
{
	struct ptp_clock *ptp = container_of(pc, struct ptp_clock, clock);

	poll_wait(fp, &ptp->tsev_wq, wait);

	return queue_cnt(&ptp->tsevq) ? EPOLLIN : 0;
}

#define EXTTS_BUFSIZE (PTP_BUF_TIMESTAMPS * sizeof(struct ptp_extts_event))

ssize_t ptp_read(struct posix_clock *pc,
		 uint rdflags, char __user *buf, size_t cnt)
{
	struct ptp_clock *ptp = container_of(pc, struct ptp_clock, clock);
	struct timestamp_event_queue *queue = &ptp->tsevq;
	struct ptp_extts_event *event;
	unsigned long flags;
	size_t qcnt, i;
	int result;

	if (cnt % sizeof(struct ptp_extts_event) != 0)
		return -EINVAL;

	if (cnt > EXTTS_BUFSIZE)
		cnt = EXTTS_BUFSIZE;

	cnt = cnt / sizeof(struct ptp_extts_event);

	if (mutex_lock_interruptible(&ptp->tsevq_mux))
		return -ERESTARTSYS;

	if (wait_event_interruptible(ptp->tsev_wq,
				     ptp->defunct || queue_cnt(queue))) {
		mutex_unlock(&ptp->tsevq_mux);
		return -ERESTARTSYS;
	}

	if (ptp->defunct) {
		mutex_unlock(&ptp->tsevq_mux);
		return -ENODEV;
	}

	event = kmalloc(EXTTS_BUFSIZE, GFP_KERNEL);
	if (!event) {
		mutex_unlock(&ptp->tsevq_mux);
		return -ENOMEM;
	}

	spin_lock_irqsave(&queue->lock, flags);

	qcnt = queue_cnt(queue);

	if (cnt > qcnt)
		cnt = qcnt;

	for (i = 0; i < cnt; i++) {
		event[i] = queue->buf[queue->head];
		queue->head = (queue->head + 1) % PTP_MAX_TIMESTAMPS;
	}

	spin_unlock_irqrestore(&queue->lock, flags);

	cnt = cnt * sizeof(struct ptp_extts_event);

	mutex_unlock(&ptp->tsevq_mux);

	result = cnt;
	if (copy_to_user(buf, event, cnt))
		result = -EFAULT;

	kfree(event);
	return result;
}
Commit	Line	Data
74ba9207	1	// SPDX-License-Identifier: GPL-2.0-or-later
d94ba80e RC	2	/*
	3	* PTP 1588 clock support - character device implementation.
	4	*
	5	* Copyright (C) 2010 OMICRON electronics GmbH
d94ba80e RC	6	*/
	7	#include <linux/module.h>
	8	#include <linux/posix-clock.h>
	9	#include <linux/poll.h>
	10	#include <linux/sched.h>
c7ec0bad	11	#include <linux/slab.h>
719f1aa4	12	#include <linux/timekeeping.h>
d94ba80e	13
efa61c8c GS	14	#include <linux/nospec.h>
efa61c8c GS	15
d94ba80e RC	16	#include "ptp_private.h"
d94ba80e RC	17
6092315d RC	18	static int ptp_disable_pinfunc(struct ptp_clock_info *ops,
	19	enum ptp_pin_function func, unsigned int chan)
	20	{
	21	struct ptp_clock_request rq;
	22	int err = 0;
	23
	24	memset(&rq, 0, sizeof(rq));
	25
	26	switch (func) {
	27	case PTP_PF_NONE:
	28	break;
	29	case PTP_PF_EXTTS:
	30	rq.type = PTP_CLK_REQ_EXTTS;
	31	rq.extts.index = chan;
	32	err = ops->enable(ops, &rq, 0);
	33	break;
	34	case PTP_PF_PEROUT:
	35	rq.type = PTP_CLK_REQ_PEROUT;
	36	rq.perout.index = chan;
	37	err = ops->enable(ops, &rq, 0);
	38	break;
	39	case PTP_PF_PHYSYNC:
	40	break;
	41	default:
	42	return -EINVAL;
	43	}
	44
	45	return err;
	46	}
	47
	48	int ptp_set_pinfunc(struct ptp_clock *ptp, unsigned int pin,
	49	enum ptp_pin_function func, unsigned int chan)
	50	{
	51	struct ptp_clock_info *info = ptp->info;
	52	struct ptp_pin_desc pin1 = NULL, pin2 = &info->pin_config[pin];
	53	unsigned int i;
	54
	55	/* Check to see if any other pin previously had this function. */
	56	for (i = 0; i < info->n_pins; i++) {
	57	if (info->pin_config[i].func == func &&
	58	info->pin_config[i].chan == chan) {
	59	pin1 = &info->pin_config[i];
	60	break;
	61	}
	62	}
	63	if (pin1 && i == pin)
	64	return 0;
	65
	66	/* Check the desired function and channel. */
	67	switch (func) {
	68	case PTP_PF_NONE:
	69	break;
	70	case PTP_PF_EXTTS:
	71	if (chan >= info->n_ext_ts)
	72	return -EINVAL;
	73	break;
	74	case PTP_PF_PEROUT:
	75	if (chan >= info->n_per_out)
	76	return -EINVAL;
	77	break;
	78	case PTP_PF_PHYSYNC:
72df7a72 SS	79	if (chan != 0)
72df7a72 SS	80	return -EINVAL;
9ba8376c	81	break;
6092315d RC	82	default:
	83	return -EINVAL;
	84	}
	85
6092315d RC	86	if (info->verify(info, pin, func, chan)) {
	87	pr_err("driver cannot use function %u on pin %u\n", func, chan);
	88	return -EOPNOTSUPP;
	89	}
	90
	91	/* Disable whatever function was previously assigned. */
	92	if (pin1) {
	93	ptp_disable_pinfunc(info, func, chan);
	94	pin1->func = PTP_PF_NONE;
	95	pin1->chan = 0;
	96	}
	97	ptp_disable_pinfunc(info, pin2->func, pin2->chan);
	98	pin2->func = func;
	99	pin2->chan = chan;
	100
	101	return 0;
	102	}
	103
d94ba80e RC	104	int ptp_open(struct posix_clock *pc, fmode_t fmode)
	105	{
	106	return 0;
	107	}
	108
	109	long ptp_ioctl(struct posix_clock *pc, unsigned int cmd, unsigned long arg)
	110	{
d94ba80e	111	struct ptp_clock *ptp = container_of(pc, struct ptp_clock, clock);
36180087	112	struct ptp_sys_offset_extended *extoff = NULL;
fbb960ac ML	113	struct ptp_sys_offset_precise precise_offset;
fbb960ac ML	114	struct system_device_crosststamp xtstamp;
d94ba80e	115	struct ptp_clock_info *ops = ptp->info;
fbb960ac	116	struct ptp_sys_offset *sysoff = NULL;
36180087	117	struct ptp_system_timestamp sts;
fbb960ac ML	118	struct ptp_clock_request req;
fbb960ac ML	119	struct ptp_clock_caps caps;
215b13dd	120	struct ptp_clock_time *pct;
fbb960ac ML	121	unsigned int i, pin_index;
fbb960ac ML	122	struct ptp_pin_desc pd;
e13cfcb0	123	struct timespec64 ts;
d94ba80e RC	124	int enable, err = 0;
	125
	126	switch (cmd) {
	127
	128	case PTP_CLOCK_GETCAPS:
41560658	129	case PTP_CLOCK_GETCAPS2:
d94ba80e	130	memset(&caps, 0, sizeof(caps));
41560658	131
d94ba80e RC	132	caps.max_adj = ptp->info->max_adj;
	133	caps.n_alarm = ptp->info->n_alarm;
	134	caps.n_ext_ts = ptp->info->n_ext_ts;
	135	caps.n_per_out = ptp->info->n_per_out;
	136	caps.pps = ptp->info->pps;
6092315d	137	caps.n_pins = ptp->info->n_pins;
719f1aa4	138	caps.cross_timestamping = ptp->info->getcrosststamp != NULL;
d3f1cbd2	139	caps.adjust_phase = ptp->info->adjphase != NULL;
e23ef227 DC	140	if (copy_to_user((void __user *)arg, &caps, sizeof(caps)))
e23ef227 DC	141	err = -EFAULT;
d94ba80e RC	142	break;
	143
	144	case PTP_EXTTS_REQUEST:
41560658 FB	145	case PTP_EXTTS_REQUEST2:
	146	memset(&req, 0, sizeof(req));
	147
d94ba80e RC	148	if (copy_from_user(&req.extts, (void __user *)arg,
	149	sizeof(req.extts))) {
	150	err = -EFAULT;
	151	break;
	152	}
cd734d54	153	if (cmd == PTP_EXTTS_REQUEST2) {
6138e687 RC	154	/* Tell the drivers to check the flags carefully. */
6138e687 RC	155	req.extts.flags \|= PTP_STRICT_FLAGS;
cd734d54 RC	156	/* Make sure no reserved bit is set. */
	157	if ((req.extts.flags & ~PTP_EXTTS_VALID_FLAGS) \|\|
	158	req.extts.rsv[0] \|\| req.extts.rsv[1]) {
	159	err = -EINVAL;
	160	break;
	161	}
	162	/* Ensure one of the rising/falling edge bits is set. */
	163	if ((req.extts.flags & PTP_ENABLE_FEATURE) &&
	164	(req.extts.flags & PTP_EXTTS_EDGES) == 0) {
	165	err = -EINVAL;
	166	break;
	167	}
41560658	168	} else if (cmd == PTP_EXTTS_REQUEST) {
2df4de16	169	req.extts.flags &= PTP_EXTTS_V1_VALID_FLAGS;
41560658 FB	170	req.extts.rsv[0] = 0;
	171	req.extts.rsv[1] = 0;
	172	}
d94ba80e RC	173	if (req.extts.index >= ops->n_ext_ts) {
	174	err = -EINVAL;
	175	break;
	176	}
	177	req.type = PTP_CLK_REQ_EXTTS;
	178	enable = req.extts.flags & PTP_ENABLE_FEATURE ? 1 : 0;
62582a7e RC	179	if (mutex_lock_interruptible(&ptp->pincfg_mux))
62582a7e RC	180	return -ERESTARTSYS;
d94ba80e	181	err = ops->enable(ops, &req, enable);
62582a7e	182	mutex_unlock(&ptp->pincfg_mux);
d94ba80e RC	183	break;
	184
	185	case PTP_PEROUT_REQUEST:
41560658 FB	186	case PTP_PEROUT_REQUEST2:
	187	memset(&req, 0, sizeof(req));
	188
d94ba80e RC	189	if (copy_from_user(&req.perout, (void __user *)arg,
	190	sizeof(req.perout))) {
	191	err = -EFAULT;
	192	break;
	193	}
f65b71aa VO	194	if (cmd == PTP_PEROUT_REQUEST2) {
	195	struct ptp_perout_request *perout = &req.perout;
	196
	197	if (perout->flags & ~PTP_PEROUT_VALID_FLAGS) {
	198	err = -EINVAL;
	199	break;
	200	}
	201	/*
	202	* The "on" field has undefined meaning if
	203	* PTP_PEROUT_DUTY_CYCLE isn't set, we must still treat
	204	* it as reserved, which must be set to zero.
	205	*/
	206	if (!(perout->flags & PTP_PEROUT_DUTY_CYCLE) &&
	207	(perout->rsv[0] \|\| perout->rsv[1] \|\|
	208	perout->rsv[2] \|\| perout->rsv[3])) {
	209	err = -EINVAL;
	210	break;
	211	}
	212	if (perout->flags & PTP_PEROUT_DUTY_CYCLE) {
	213	/* The duty cycle must be subunitary. */
	214	if (perout->on.sec > perout->period.sec \|\|
	215	(perout->on.sec == perout->period.sec &&
	216	perout->on.nsec > perout->period.nsec)) {
	217	err = -ERANGE;
	218	break;
	219	}
	220	}
c29f9aa3 VO	221	if (perout->flags & PTP_PEROUT_PHASE) {
	222	/*
	223	* The phase should be specified modulo the
	224	* period, therefore anything equal or larger
	225	* than 1 period is invalid.
	226	*/
	227	if (perout->phase.sec > perout->period.sec \|\|
	228	(perout->phase.sec == perout->period.sec &&
	229	perout->phase.nsec >= perout->period.nsec)) {
	230	err = -ERANGE;
	231	break;
	232	}
	233	}
41560658	234	} else if (cmd == PTP_PEROUT_REQUEST) {
2df4de16	235	req.perout.flags &= PTP_PEROUT_V1_VALID_FLAGS;
41560658 FB	236	req.perout.rsv[0] = 0;
	237	req.perout.rsv[1] = 0;
	238	req.perout.rsv[2] = 0;
	239	req.perout.rsv[3] = 0;
	240	}
d94ba80e RC	241	if (req.perout.index >= ops->n_per_out) {
	242	err = -EINVAL;
	243	break;
	244	}
	245	req.type = PTP_CLK_REQ_PEROUT;
	246	enable = req.perout.period.sec \|\| req.perout.period.nsec;
62582a7e RC	247	if (mutex_lock_interruptible(&ptp->pincfg_mux))
62582a7e RC	248	return -ERESTARTSYS;
d94ba80e	249	err = ops->enable(ops, &req, enable);
62582a7e	250	mutex_unlock(&ptp->pincfg_mux);
d94ba80e RC	251	break;
	252
	253	case PTP_ENABLE_PPS:
41560658 FB	254	case PTP_ENABLE_PPS2:
	255	memset(&req, 0, sizeof(req));
	256
d94ba80e RC	257	if (!capable(CAP_SYS_TIME))
	258	return -EPERM;
	259	req.type = PTP_CLK_REQ_PPS;
	260	enable = arg ? 1 : 0;
62582a7e RC	261	if (mutex_lock_interruptible(&ptp->pincfg_mux))
62582a7e RC	262	return -ERESTARTSYS;
d94ba80e	263	err = ops->enable(ops, &req, enable);
62582a7e	264	mutex_unlock(&ptp->pincfg_mux);
d94ba80e RC	265	break;
d94ba80e RC	266
719f1aa4	267	case PTP_SYS_OFFSET_PRECISE:
41560658	268	case PTP_SYS_OFFSET_PRECISE2:
719f1aa4 CH	269	if (!ptp->info->getcrosststamp) {
	270	err = -EOPNOTSUPP;
	271	break;
	272	}
	273	err = ptp->info->getcrosststamp(ptp->info, &xtstamp);
	274	if (err)
	275	break;
	276
02a9079c	277	memset(&precise_offset, 0, sizeof(precise_offset));
719f1aa4 CH	278	ts = ktime_to_timespec64(xtstamp.device);
	279	precise_offset.device.sec = ts.tv_sec;
	280	precise_offset.device.nsec = ts.tv_nsec;
	281	ts = ktime_to_timespec64(xtstamp.sys_realtime);
	282	precise_offset.sys_realtime.sec = ts.tv_sec;
	283	precise_offset.sys_realtime.nsec = ts.tv_nsec;
	284	ts = ktime_to_timespec64(xtstamp.sys_monoraw);
	285	precise_offset.sys_monoraw.sec = ts.tv_sec;
	286	precise_offset.sys_monoraw.nsec = ts.tv_nsec;
	287	if (copy_to_user((void __user *)arg, &precise_offset,
	288	sizeof(precise_offset)))
	289	err = -EFAULT;
	290	break;
	291
36180087	292	case PTP_SYS_OFFSET_EXTENDED:
41560658	293	case PTP_SYS_OFFSET_EXTENDED2:
36180087 ML	294	if (!ptp->info->gettimex64) {
	295	err = -EOPNOTSUPP;
	296	break;
	297	}
	298	extoff = memdup_user((void __user )arg, sizeof(extoff));
	299	if (IS_ERR(extoff)) {
	300	err = PTR_ERR(extoff);
	301	extoff = NULL;
	302	break;
	303	}
895ac137 ES	304	if (extoff->n_samples > PTP_MAX_SAMPLES
895ac137 ES	305	\|\| extoff->rsv[0] \|\| extoff->rsv[1] \|\| extoff->rsv[2]) {
36180087 ML	306	err = -EINVAL;
	307	break;
	308	}
	309	for (i = 0; i < extoff->n_samples; i++) {
	310	err = ptp->info->gettimex64(ptp->info, &ts, &sts);
	311	if (err)
	312	goto out;
	313	extoff->ts[i][0].sec = sts.pre_ts.tv_sec;
	314	extoff->ts[i][0].nsec = sts.pre_ts.tv_nsec;
	315	extoff->ts[i][1].sec = ts.tv_sec;
	316	extoff->ts[i][1].nsec = ts.tv_nsec;
	317	extoff->ts[i][2].sec = sts.post_ts.tv_sec;
	318	extoff->ts[i][2].nsec = sts.post_ts.tv_nsec;
	319	}
	320	if (copy_to_user((void __user )arg, extoff, sizeof(extoff)))
	321	err = -EFAULT;
	322	break;
	323
215b13dd	324	case PTP_SYS_OFFSET:
41560658	325	case PTP_SYS_OFFSET2:
2ece068e MFW	326	sysoff = memdup_user((void __user )arg, sizeof(sysoff));
	327	if (IS_ERR(sysoff)) {
	328	err = PTR_ERR(sysoff);
6756325a	329	sysoff = NULL;
215b13dd RC	330	break;
215b13dd RC	331	}
c3484c27	332	if (sysoff->n_samples > PTP_MAX_SAMPLES) {
215b13dd RC	333	err = -EINVAL;
	334	break;
	335	}
c3484c27 RC	336	pct = &sysoff->ts[0];
c3484c27 RC	337	for (i = 0; i < sysoff->n_samples; i++) {
f696a21c	338	ktime_get_real_ts64(&ts);
215b13dd RC	339	pct->sec = ts.tv_sec;
	340	pct->nsec = ts.tv_nsec;
	341	pct++;
916444df ML	342	if (ops->gettimex64)
	343	err = ops->gettimex64(ops, &ts, NULL);
	344	else
	345	err = ops->gettime64(ops, &ts);
83d0bdc7 ML	346	if (err)
83d0bdc7 ML	347	goto out;
215b13dd RC	348	pct->sec = ts.tv_sec;
	349	pct->nsec = ts.tv_nsec;
	350	pct++;
	351	}
f696a21c	352	ktime_get_real_ts64(&ts);
215b13dd RC	353	pct->sec = ts.tv_sec;
215b13dd RC	354	pct->nsec = ts.tv_nsec;
c3484c27	355	if (copy_to_user((void __user )arg, sysoff, sizeof(sysoff)))
215b13dd RC	356	err = -EFAULT;
	357	break;
	358
6092315d	359	case PTP_PIN_GETFUNC:
41560658	360	case PTP_PIN_GETFUNC2:
6092315d RC	361	if (copy_from_user(&pd, (void __user *)arg, sizeof(pd))) {
	362	err = -EFAULT;
	363	break;
	364	}
41560658 FB	365	if ((pd.rsv[0] \|\| pd.rsv[1] \|\| pd.rsv[2]
	366	\|\| pd.rsv[3] \|\| pd.rsv[4])
	367	&& cmd == PTP_PIN_GETFUNC2) {
	368	err = -EINVAL;
	369	break;
	370	} else if (cmd == PTP_PIN_GETFUNC) {
	371	pd.rsv[0] = 0;
	372	pd.rsv[1] = 0;
	373	pd.rsv[2] = 0;
	374	pd.rsv[3] = 0;
	375	pd.rsv[4] = 0;
	376	}
6092315d RC	377	pin_index = pd.index;
	378	if (pin_index >= ops->n_pins) {
	379	err = -EINVAL;
	380	break;
	381	}
efa61c8c	382	pin_index = array_index_nospec(pin_index, ops->n_pins);
6092315d RC	383	if (mutex_lock_interruptible(&ptp->pincfg_mux))
	384	return -ERESTARTSYS;
	385	pd = ops->pin_config[pin_index];
	386	mutex_unlock(&ptp->pincfg_mux);
	387	if (!err && copy_to_user((void __user *)arg, &pd, sizeof(pd)))
	388	err = -EFAULT;
	389	break;
	390
	391	case PTP_PIN_SETFUNC:
41560658	392	case PTP_PIN_SETFUNC2:
6092315d RC	393	if (copy_from_user(&pd, (void __user *)arg, sizeof(pd))) {
	394	err = -EFAULT;
	395	break;
	396	}
41560658 FB	397	if ((pd.rsv[0] \|\| pd.rsv[1] \|\| pd.rsv[2]
	398	\|\| pd.rsv[3] \|\| pd.rsv[4])
	399	&& cmd == PTP_PIN_SETFUNC2) {
	400	err = -EINVAL;
	401	break;
	402	} else if (cmd == PTP_PIN_SETFUNC) {
	403	pd.rsv[0] = 0;
	404	pd.rsv[1] = 0;
	405	pd.rsv[2] = 0;
	406	pd.rsv[3] = 0;
	407	pd.rsv[4] = 0;
	408	}
6092315d RC	409	pin_index = pd.index;
	410	if (pin_index >= ops->n_pins) {
	411	err = -EINVAL;
	412	break;
	413	}
efa61c8c	414	pin_index = array_index_nospec(pin_index, ops->n_pins);
6092315d RC	415	if (mutex_lock_interruptible(&ptp->pincfg_mux))
	416	return -ERESTARTSYS;
	417	err = ptp_set_pinfunc(ptp, pin_index, pd.func, pd.chan);
	418	mutex_unlock(&ptp->pincfg_mux);
	419	break;
	420
d94ba80e RC	421	default:
	422	err = -ENOTTY;
	423	break;
	424	}
c3484c27	425
83d0bdc7	426	out:
36180087	427	kfree(extoff);
c3484c27	428	kfree(sysoff);
d94ba80e RC	429	return err;
	430	}
	431
afc9a42b	432	__poll_t ptp_poll(struct posix_clock pc, struct file fp, poll_table *wait)
d94ba80e RC	433	{
	434	struct ptp_clock *ptp = container_of(pc, struct ptp_clock, clock);
	435
	436	poll_wait(fp, &ptp->tsev_wq, wait);
	437
a9a08845	438	return queue_cnt(&ptp->tsevq) ? EPOLLIN : 0;
d94ba80e RC	439	}
d94ba80e RC	440
c7ec0bad RC	441	#define EXTTS_BUFSIZE (PTP_BUF_TIMESTAMPS * sizeof(struct ptp_extts_event))
c7ec0bad RC	442
d94ba80e RC	443	ssize_t ptp_read(struct posix_clock *pc,
	444	uint rdflags, char __user *buf, size_t cnt)
	445	{
	446	struct ptp_clock *ptp = container_of(pc, struct ptp_clock, clock);
	447	struct timestamp_event_queue *queue = &ptp->tsevq;
c7ec0bad	448	struct ptp_extts_event *event;
d94ba80e RC	449	unsigned long flags;
d94ba80e RC	450	size_t qcnt, i;
c7ec0bad	451	int result;
d94ba80e RC	452
	453	if (cnt % sizeof(struct ptp_extts_event) != 0)
	454	return -EINVAL;
	455
c7ec0bad RC	456	if (cnt > EXTTS_BUFSIZE)
c7ec0bad RC	457	cnt = EXTTS_BUFSIZE;
d94ba80e RC	458
	459	cnt = cnt / sizeof(struct ptp_extts_event);
	460
	461	if (mutex_lock_interruptible(&ptp->tsevq_mux))
	462	return -ERESTARTSYS;
	463
	464	if (wait_event_interruptible(ptp->tsev_wq,
	465	ptp->defunct \|\| queue_cnt(queue))) {
	466	mutex_unlock(&ptp->tsevq_mux);
	467	return -ERESTARTSYS;
	468	}
	469
fb5a18cf DC	470	if (ptp->defunct) {
fb5a18cf DC	471	mutex_unlock(&ptp->tsevq_mux);
d94ba80e	472	return -ENODEV;
fb5a18cf	473	}
d94ba80e	474
c7ec0bad RC	475	event = kmalloc(EXTTS_BUFSIZE, GFP_KERNEL);
	476	if (!event) {
	477	mutex_unlock(&ptp->tsevq_mux);
	478	return -ENOMEM;
	479	}
	480
d94ba80e RC	481	spin_lock_irqsave(&queue->lock, flags);
	482
	483	qcnt = queue_cnt(queue);
	484
	485	if (cnt > qcnt)
	486	cnt = qcnt;
	487
	488	for (i = 0; i < cnt; i++) {
	489	event[i] = queue->buf[queue->head];
	490	queue->head = (queue->head + 1) % PTP_MAX_TIMESTAMPS;
	491	}
	492
	493	spin_unlock_irqrestore(&queue->lock, flags);
	494
	495	cnt = cnt * sizeof(struct ptp_extts_event);
	496
	497	mutex_unlock(&ptp->tsevq_mux);
	498
c7ec0bad	499	result = cnt;
fb5a18cf	500	if (copy_to_user(buf, event, cnt))
c7ec0bad	501	result = -EFAULT;
d94ba80e	502
c7ec0bad RC	503	kfree(event);
c7ec0bad RC	504	return result;
d94ba80e	505	}