174ba9207SThomas Gleixner // SPDX-License-Identifier: GPL-2.0-or-later
2d94ba80eSRichard Cochran /*
3d94ba80eSRichard Cochran * PTP 1588 clock support - character device implementation.
4d94ba80eSRichard Cochran *
5d94ba80eSRichard Cochran * Copyright (C) 2010 OMICRON electronics GmbH
6d94ba80eSRichard Cochran */
7d94ba80eSRichard Cochran #include <linux/module.h>
8d94ba80eSRichard Cochran #include <linux/posix-clock.h>
9d94ba80eSRichard Cochran #include <linux/poll.h>
10d94ba80eSRichard Cochran #include <linux/sched.h>
11c7ec0badSRichard Cochran #include <linux/slab.h>
12719f1aa4SChristopher S. Hall #include <linux/timekeeping.h>
13d94ba80eSRichard Cochran
14efa61c8cSGustavo A. R. Silva #include <linux/nospec.h>
15efa61c8cSGustavo A. R. Silva
16d94ba80eSRichard Cochran #include "ptp_private.h"
17d94ba80eSRichard Cochran
ptp_disable_pinfunc(struct ptp_clock_info * ops,enum ptp_pin_function func,unsigned int chan)186092315dSRichard Cochran static int ptp_disable_pinfunc(struct ptp_clock_info *ops,
196092315dSRichard Cochran enum ptp_pin_function func, unsigned int chan)
206092315dSRichard Cochran {
216092315dSRichard Cochran struct ptp_clock_request rq;
226092315dSRichard Cochran int err = 0;
236092315dSRichard Cochran
246092315dSRichard Cochran memset(&rq, 0, sizeof(rq));
256092315dSRichard Cochran
266092315dSRichard Cochran switch (func) {
276092315dSRichard Cochran case PTP_PF_NONE:
286092315dSRichard Cochran break;
296092315dSRichard Cochran case PTP_PF_EXTTS:
306092315dSRichard Cochran rq.type = PTP_CLK_REQ_EXTTS;
316092315dSRichard Cochran rq.extts.index = chan;
326092315dSRichard Cochran err = ops->enable(ops, &rq, 0);
336092315dSRichard Cochran break;
346092315dSRichard Cochran case PTP_PF_PEROUT:
356092315dSRichard Cochran rq.type = PTP_CLK_REQ_PEROUT;
366092315dSRichard Cochran rq.perout.index = chan;
376092315dSRichard Cochran err = ops->enable(ops, &rq, 0);
386092315dSRichard Cochran break;
396092315dSRichard Cochran case PTP_PF_PHYSYNC:
406092315dSRichard Cochran break;
416092315dSRichard Cochran default:
426092315dSRichard Cochran return -EINVAL;
436092315dSRichard Cochran }
446092315dSRichard Cochran
456092315dSRichard Cochran return err;
466092315dSRichard Cochran }
476092315dSRichard Cochran
ptp_set_pinfunc(struct ptp_clock * ptp,unsigned int pin,enum ptp_pin_function func,unsigned int chan)486092315dSRichard Cochran int ptp_set_pinfunc(struct ptp_clock *ptp, unsigned int pin,
496092315dSRichard Cochran enum ptp_pin_function func, unsigned int chan)
506092315dSRichard Cochran {
516092315dSRichard Cochran struct ptp_clock_info *info = ptp->info;
526092315dSRichard Cochran struct ptp_pin_desc *pin1 = NULL, *pin2 = &info->pin_config[pin];
536092315dSRichard Cochran unsigned int i;
546092315dSRichard Cochran
556092315dSRichard Cochran /* Check to see if any other pin previously had this function. */
566092315dSRichard Cochran for (i = 0; i < info->n_pins; i++) {
576092315dSRichard Cochran if (info->pin_config[i].func == func &&
586092315dSRichard Cochran info->pin_config[i].chan == chan) {
596092315dSRichard Cochran pin1 = &info->pin_config[i];
606092315dSRichard Cochran break;
616092315dSRichard Cochran }
626092315dSRichard Cochran }
636092315dSRichard Cochran if (pin1 && i == pin)
646092315dSRichard Cochran return 0;
656092315dSRichard Cochran
666092315dSRichard Cochran /* Check the desired function and channel. */
676092315dSRichard Cochran switch (func) {
686092315dSRichard Cochran case PTP_PF_NONE:
696092315dSRichard Cochran break;
706092315dSRichard Cochran case PTP_PF_EXTTS:
716092315dSRichard Cochran if (chan >= info->n_ext_ts)
726092315dSRichard Cochran return -EINVAL;
736092315dSRichard Cochran break;
746092315dSRichard Cochran case PTP_PF_PEROUT:
756092315dSRichard Cochran if (chan >= info->n_per_out)
766092315dSRichard Cochran return -EINVAL;
776092315dSRichard Cochran break;
786092315dSRichard Cochran case PTP_PF_PHYSYNC:
7972df7a72SStefan Sørensen if (chan != 0)
806092315dSRichard Cochran return -EINVAL;
819ba8376cSGustavo A. R. Silva break;
826092315dSRichard Cochran default:
836092315dSRichard Cochran return -EINVAL;
846092315dSRichard Cochran }
856092315dSRichard Cochran
866092315dSRichard Cochran if (info->verify(info, pin, func, chan)) {
87b21bb09fSKarol Kolacinski pr_err("driver cannot use function %u and channel %u on pin %u\n",
88b21bb09fSKarol Kolacinski func, chan, pin);
896092315dSRichard Cochran return -EOPNOTSUPP;
906092315dSRichard Cochran }
916092315dSRichard Cochran
926092315dSRichard Cochran /* Disable whatever function was previously assigned. */
936092315dSRichard Cochran if (pin1) {
946092315dSRichard Cochran ptp_disable_pinfunc(info, func, chan);
956092315dSRichard Cochran pin1->func = PTP_PF_NONE;
966092315dSRichard Cochran pin1->chan = 0;
976092315dSRichard Cochran }
986092315dSRichard Cochran ptp_disable_pinfunc(info, pin2->func, pin2->chan);
996092315dSRichard Cochran pin2->func = func;
1006092315dSRichard Cochran pin2->chan = chan;
1016092315dSRichard Cochran
1026092315dSRichard Cochran return 0;
1036092315dSRichard Cochran }
1046092315dSRichard Cochran
ptp_open(struct posix_clock * pc,fmode_t fmode)105d94ba80eSRichard Cochran int ptp_open(struct posix_clock *pc, fmode_t fmode)
106d94ba80eSRichard Cochran {
107d94ba80eSRichard Cochran return 0;
108d94ba80eSRichard Cochran }
109d94ba80eSRichard Cochran
ptp_ioctl(struct posix_clock * pc,unsigned int cmd,unsigned long arg)110d94ba80eSRichard Cochran long ptp_ioctl(struct posix_clock *pc, unsigned int cmd, unsigned long arg)
111d94ba80eSRichard Cochran {
112d94ba80eSRichard Cochran struct ptp_clock *ptp = container_of(pc, struct ptp_clock, clock);
11336180087SMiroslav Lichvar struct ptp_sys_offset_extended *extoff = NULL;
114fbb960acSMiroslav Lichvar struct ptp_sys_offset_precise precise_offset;
115719f1aa4SChristopher S. Hall struct system_device_crosststamp xtstamp;
116fbb960acSMiroslav Lichvar struct ptp_clock_info *ops = ptp->info;
117fbb960acSMiroslav Lichvar struct ptp_sys_offset *sysoff = NULL;
11836180087SMiroslav Lichvar struct ptp_system_timestamp sts;
119fbb960acSMiroslav Lichvar struct ptp_clock_request req;
120fbb960acSMiroslav Lichvar struct ptp_clock_caps caps;
121fbb960acSMiroslav Lichvar struct ptp_clock_time *pct;
1226092315dSRichard Cochran unsigned int i, pin_index;
123fbb960acSMiroslav Lichvar struct ptp_pin_desc pd;
124fbb960acSMiroslav Lichvar struct timespec64 ts;
125fbb960acSMiroslav Lichvar int enable, err = 0;
126d94ba80eSRichard Cochran
127d94ba80eSRichard Cochran switch (cmd) {
128d94ba80eSRichard Cochran
129d94ba80eSRichard Cochran case PTP_CLOCK_GETCAPS:
13041560658SFelipe Balbi case PTP_CLOCK_GETCAPS2:
131d94ba80eSRichard Cochran memset(&caps, 0, sizeof(caps));
13241560658SFelipe Balbi
133d94ba80eSRichard Cochran caps.max_adj = ptp->info->max_adj;
134d94ba80eSRichard Cochran caps.n_alarm = ptp->info->n_alarm;
135d94ba80eSRichard Cochran caps.n_ext_ts = ptp->info->n_ext_ts;
136d94ba80eSRichard Cochran caps.n_per_out = ptp->info->n_per_out;
137d94ba80eSRichard Cochran caps.pps = ptp->info->pps;
1386092315dSRichard Cochran caps.n_pins = ptp->info->n_pins;
139719f1aa4SChristopher S. Hall caps.cross_timestamping = ptp->info->getcrosststamp != NULL;
140c3b60ab7SRahul Rameshbabu caps.adjust_phase = ptp->info->adjphase != NULL &&
141c3b60ab7SRahul Rameshbabu ptp->info->getmaxphase != NULL;
142c3b60ab7SRahul Rameshbabu if (caps.adjust_phase)
143c3b60ab7SRahul Rameshbabu caps.max_phase_adj = ptp->info->getmaxphase(ptp->info);
144e23ef227SDan Carpenter if (copy_to_user((void __user *)arg, &caps, sizeof(caps)))
145e23ef227SDan Carpenter err = -EFAULT;
146d94ba80eSRichard Cochran break;
147d94ba80eSRichard Cochran
148d94ba80eSRichard Cochran case PTP_EXTTS_REQUEST:
14941560658SFelipe Balbi case PTP_EXTTS_REQUEST2:
15041560658SFelipe Balbi memset(&req, 0, sizeof(req));
15141560658SFelipe Balbi
152d94ba80eSRichard Cochran if (copy_from_user(&req.extts, (void __user *)arg,
153d94ba80eSRichard Cochran sizeof(req.extts))) {
154d94ba80eSRichard Cochran err = -EFAULT;
155d94ba80eSRichard Cochran break;
156d94ba80eSRichard Cochran }
157cd734d54SRichard Cochran if (cmd == PTP_EXTTS_REQUEST2) {
1586138e687SRichard Cochran /* Tell the drivers to check the flags carefully. */
1596138e687SRichard Cochran req.extts.flags |= PTP_STRICT_FLAGS;
160cd734d54SRichard Cochran /* Make sure no reserved bit is set. */
161cd734d54SRichard Cochran if ((req.extts.flags & ~PTP_EXTTS_VALID_FLAGS) ||
162cd734d54SRichard Cochran req.extts.rsv[0] || req.extts.rsv[1]) {
16341560658SFelipe Balbi err = -EINVAL;
16441560658SFelipe Balbi break;
165cd734d54SRichard Cochran }
166cd734d54SRichard Cochran /* Ensure one of the rising/falling edge bits is set. */
167cd734d54SRichard Cochran if ((req.extts.flags & PTP_ENABLE_FEATURE) &&
168cd734d54SRichard Cochran (req.extts.flags & PTP_EXTTS_EDGES) == 0) {
169cd734d54SRichard Cochran err = -EINVAL;
170cd734d54SRichard Cochran break;
171cd734d54SRichard Cochran }
17241560658SFelipe Balbi } else if (cmd == PTP_EXTTS_REQUEST) {
1732df4de16SJacob Keller req.extts.flags &= PTP_EXTTS_V1_VALID_FLAGS;
17441560658SFelipe Balbi req.extts.rsv[0] = 0;
17541560658SFelipe Balbi req.extts.rsv[1] = 0;
17641560658SFelipe Balbi }
177d94ba80eSRichard Cochran if (req.extts.index >= ops->n_ext_ts) {
178d94ba80eSRichard Cochran err = -EINVAL;
179d94ba80eSRichard Cochran break;
180d94ba80eSRichard Cochran }
181d94ba80eSRichard Cochran req.type = PTP_CLK_REQ_EXTTS;
182d94ba80eSRichard Cochran enable = req.extts.flags & PTP_ENABLE_FEATURE ? 1 : 0;
18362582a7eSRichard Cochran if (mutex_lock_interruptible(&ptp->pincfg_mux))
18462582a7eSRichard Cochran return -ERESTARTSYS;
185d94ba80eSRichard Cochran err = ops->enable(ops, &req, enable);
18662582a7eSRichard Cochran mutex_unlock(&ptp->pincfg_mux);
187d94ba80eSRichard Cochran break;
188d94ba80eSRichard Cochran
189d94ba80eSRichard Cochran case PTP_PEROUT_REQUEST:
19041560658SFelipe Balbi case PTP_PEROUT_REQUEST2:
19141560658SFelipe Balbi memset(&req, 0, sizeof(req));
19241560658SFelipe Balbi
193d94ba80eSRichard Cochran if (copy_from_user(&req.perout, (void __user *)arg,
194d94ba80eSRichard Cochran sizeof(req.perout))) {
195d94ba80eSRichard Cochran err = -EFAULT;
196d94ba80eSRichard Cochran break;
197d94ba80eSRichard Cochran }
198f65b71aaSVladimir Oltean if (cmd == PTP_PEROUT_REQUEST2) {
199f65b71aaSVladimir Oltean struct ptp_perout_request *perout = &req.perout;
200f65b71aaSVladimir Oltean
201f65b71aaSVladimir Oltean if (perout->flags & ~PTP_PEROUT_VALID_FLAGS) {
20241560658SFelipe Balbi err = -EINVAL;
20341560658SFelipe Balbi break;
204f65b71aaSVladimir Oltean }
205f65b71aaSVladimir Oltean /*
206f65b71aaSVladimir Oltean * The "on" field has undefined meaning if
207f65b71aaSVladimir Oltean * PTP_PEROUT_DUTY_CYCLE isn't set, we must still treat
208f65b71aaSVladimir Oltean * it as reserved, which must be set to zero.
209f65b71aaSVladimir Oltean */
210f65b71aaSVladimir Oltean if (!(perout->flags & PTP_PEROUT_DUTY_CYCLE) &&
211f65b71aaSVladimir Oltean (perout->rsv[0] || perout->rsv[1] ||
212f65b71aaSVladimir Oltean perout->rsv[2] || perout->rsv[3])) {
213f65b71aaSVladimir Oltean err = -EINVAL;
214f65b71aaSVladimir Oltean break;
215f65b71aaSVladimir Oltean }
216f65b71aaSVladimir Oltean if (perout->flags & PTP_PEROUT_DUTY_CYCLE) {
217f65b71aaSVladimir Oltean /* The duty cycle must be subunitary. */
218f65b71aaSVladimir Oltean if (perout->on.sec > perout->period.sec ||
219f65b71aaSVladimir Oltean (perout->on.sec == perout->period.sec &&
220f65b71aaSVladimir Oltean perout->on.nsec > perout->period.nsec)) {
221f65b71aaSVladimir Oltean err = -ERANGE;
222f65b71aaSVladimir Oltean break;
223f65b71aaSVladimir Oltean }
224f65b71aaSVladimir Oltean }
225c29f9aa3SVladimir Oltean if (perout->flags & PTP_PEROUT_PHASE) {
226c29f9aa3SVladimir Oltean /*
227c29f9aa3SVladimir Oltean * The phase should be specified modulo the
228c29f9aa3SVladimir Oltean * period, therefore anything equal or larger
229c29f9aa3SVladimir Oltean * than 1 period is invalid.
230c29f9aa3SVladimir Oltean */
231c29f9aa3SVladimir Oltean if (perout->phase.sec > perout->period.sec ||
232c29f9aa3SVladimir Oltean (perout->phase.sec == perout->period.sec &&
233c29f9aa3SVladimir Oltean perout->phase.nsec >= perout->period.nsec)) {
234c29f9aa3SVladimir Oltean err = -ERANGE;
235c29f9aa3SVladimir Oltean break;
236c29f9aa3SVladimir Oltean }
237c29f9aa3SVladimir Oltean }
23841560658SFelipe Balbi } else if (cmd == PTP_PEROUT_REQUEST) {
2392df4de16SJacob Keller req.perout.flags &= PTP_PEROUT_V1_VALID_FLAGS;
24041560658SFelipe Balbi req.perout.rsv[0] = 0;
24141560658SFelipe Balbi req.perout.rsv[1] = 0;
24241560658SFelipe Balbi req.perout.rsv[2] = 0;
24341560658SFelipe Balbi req.perout.rsv[3] = 0;
24441560658SFelipe Balbi }
245d94ba80eSRichard Cochran if (req.perout.index >= ops->n_per_out) {
246d94ba80eSRichard Cochran err = -EINVAL;
247d94ba80eSRichard Cochran break;
248d94ba80eSRichard Cochran }
249d94ba80eSRichard Cochran req.type = PTP_CLK_REQ_PEROUT;
250d94ba80eSRichard Cochran enable = req.perout.period.sec || req.perout.period.nsec;
25162582a7eSRichard Cochran if (mutex_lock_interruptible(&ptp->pincfg_mux))
25262582a7eSRichard Cochran return -ERESTARTSYS;
253d94ba80eSRichard Cochran err = ops->enable(ops, &req, enable);
25462582a7eSRichard Cochran mutex_unlock(&ptp->pincfg_mux);
255d94ba80eSRichard Cochran break;
256d94ba80eSRichard Cochran
257d94ba80eSRichard Cochran case PTP_ENABLE_PPS:
25841560658SFelipe Balbi case PTP_ENABLE_PPS2:
25941560658SFelipe Balbi memset(&req, 0, sizeof(req));
26041560658SFelipe Balbi
261d94ba80eSRichard Cochran if (!capable(CAP_SYS_TIME))
262d94ba80eSRichard Cochran return -EPERM;
263d94ba80eSRichard Cochran req.type = PTP_CLK_REQ_PPS;
264d94ba80eSRichard Cochran enable = arg ? 1 : 0;
26562582a7eSRichard Cochran if (mutex_lock_interruptible(&ptp->pincfg_mux))
26662582a7eSRichard Cochran return -ERESTARTSYS;
267d94ba80eSRichard Cochran err = ops->enable(ops, &req, enable);
26862582a7eSRichard Cochran mutex_unlock(&ptp->pincfg_mux);
269d94ba80eSRichard Cochran break;
270d94ba80eSRichard Cochran
271719f1aa4SChristopher S. Hall case PTP_SYS_OFFSET_PRECISE:
27241560658SFelipe Balbi case PTP_SYS_OFFSET_PRECISE2:
273719f1aa4SChristopher S. Hall if (!ptp->info->getcrosststamp) {
274719f1aa4SChristopher S. Hall err = -EOPNOTSUPP;
275719f1aa4SChristopher S. Hall break;
276719f1aa4SChristopher S. Hall }
277719f1aa4SChristopher S. Hall err = ptp->info->getcrosststamp(ptp->info, &xtstamp);
278719f1aa4SChristopher S. Hall if (err)
279719f1aa4SChristopher S. Hall break;
280719f1aa4SChristopher S. Hall
28102a9079cSVlad Tsyrklevich memset(&precise_offset, 0, sizeof(precise_offset));
282719f1aa4SChristopher S. Hall ts = ktime_to_timespec64(xtstamp.device);
283719f1aa4SChristopher S. Hall precise_offset.device.sec = ts.tv_sec;
284719f1aa4SChristopher S. Hall precise_offset.device.nsec = ts.tv_nsec;
285719f1aa4SChristopher S. Hall ts = ktime_to_timespec64(xtstamp.sys_realtime);
286719f1aa4SChristopher S. Hall precise_offset.sys_realtime.sec = ts.tv_sec;
287719f1aa4SChristopher S. Hall precise_offset.sys_realtime.nsec = ts.tv_nsec;
288719f1aa4SChristopher S. Hall ts = ktime_to_timespec64(xtstamp.sys_monoraw);
289719f1aa4SChristopher S. Hall precise_offset.sys_monoraw.sec = ts.tv_sec;
290719f1aa4SChristopher S. Hall precise_offset.sys_monoraw.nsec = ts.tv_nsec;
291719f1aa4SChristopher S. Hall if (copy_to_user((void __user *)arg, &precise_offset,
292719f1aa4SChristopher S. Hall sizeof(precise_offset)))
293719f1aa4SChristopher S. Hall err = -EFAULT;
294719f1aa4SChristopher S. Hall break;
295719f1aa4SChristopher S. Hall
29636180087SMiroslav Lichvar case PTP_SYS_OFFSET_EXTENDED:
29741560658SFelipe Balbi case PTP_SYS_OFFSET_EXTENDED2:
29836180087SMiroslav Lichvar if (!ptp->info->gettimex64) {
29936180087SMiroslav Lichvar err = -EOPNOTSUPP;
30036180087SMiroslav Lichvar break;
30136180087SMiroslav Lichvar }
30236180087SMiroslav Lichvar extoff = memdup_user((void __user *)arg, sizeof(*extoff));
30336180087SMiroslav Lichvar if (IS_ERR(extoff)) {
30436180087SMiroslav Lichvar err = PTR_ERR(extoff);
30536180087SMiroslav Lichvar extoff = NULL;
30636180087SMiroslav Lichvar break;
30736180087SMiroslav Lichvar }
308895ac137SEugene Syromiatnikov if (extoff->n_samples > PTP_MAX_SAMPLES
309895ac137SEugene Syromiatnikov || extoff->rsv[0] || extoff->rsv[1] || extoff->rsv[2]) {
31036180087SMiroslav Lichvar err = -EINVAL;
31136180087SMiroslav Lichvar break;
31236180087SMiroslav Lichvar }
31336180087SMiroslav Lichvar for (i = 0; i < extoff->n_samples; i++) {
31436180087SMiroslav Lichvar err = ptp->info->gettimex64(ptp->info, &ts, &sts);
31536180087SMiroslav Lichvar if (err)
31636180087SMiroslav Lichvar goto out;
31736180087SMiroslav Lichvar extoff->ts[i][0].sec = sts.pre_ts.tv_sec;
31836180087SMiroslav Lichvar extoff->ts[i][0].nsec = sts.pre_ts.tv_nsec;
31936180087SMiroslav Lichvar extoff->ts[i][1].sec = ts.tv_sec;
32036180087SMiroslav Lichvar extoff->ts[i][1].nsec = ts.tv_nsec;
32136180087SMiroslav Lichvar extoff->ts[i][2].sec = sts.post_ts.tv_sec;
32236180087SMiroslav Lichvar extoff->ts[i][2].nsec = sts.post_ts.tv_nsec;
32336180087SMiroslav Lichvar }
32436180087SMiroslav Lichvar if (copy_to_user((void __user *)arg, extoff, sizeof(*extoff)))
32536180087SMiroslav Lichvar err = -EFAULT;
32636180087SMiroslav Lichvar break;
32736180087SMiroslav Lichvar
328215b13ddSRichard Cochran case PTP_SYS_OFFSET:
32941560658SFelipe Balbi case PTP_SYS_OFFSET2:
3302ece068eSMuhammad Falak R Wani sysoff = memdup_user((void __user *)arg, sizeof(*sysoff));
3312ece068eSMuhammad Falak R Wani if (IS_ERR(sysoff)) {
3322ece068eSMuhammad Falak R Wani err = PTR_ERR(sysoff);
3336756325aSDan Carpenter sysoff = NULL;
334215b13ddSRichard Cochran break;
335215b13ddSRichard Cochran }
336c3484c27SRichard Cochran if (sysoff->n_samples > PTP_MAX_SAMPLES) {
337215b13ddSRichard Cochran err = -EINVAL;
338215b13ddSRichard Cochran break;
339215b13ddSRichard Cochran }
340c3484c27SRichard Cochran pct = &sysoff->ts[0];
341c3484c27SRichard Cochran for (i = 0; i < sysoff->n_samples; i++) {
342f696a21cSArnd Bergmann ktime_get_real_ts64(&ts);
343215b13ddSRichard Cochran pct->sec = ts.tv_sec;
344215b13ddSRichard Cochran pct->nsec = ts.tv_nsec;
345215b13ddSRichard Cochran pct++;
346916444dfSMiroslav Lichvar if (ops->gettimex64)
347916444dfSMiroslav Lichvar err = ops->gettimex64(ops, &ts, NULL);
348916444dfSMiroslav Lichvar else
349916444dfSMiroslav Lichvar err = ops->gettime64(ops, &ts);
35083d0bdc7SMiroslav Lichvar if (err)
35183d0bdc7SMiroslav Lichvar goto out;
352215b13ddSRichard Cochran pct->sec = ts.tv_sec;
353215b13ddSRichard Cochran pct->nsec = ts.tv_nsec;
354215b13ddSRichard Cochran pct++;
355215b13ddSRichard Cochran }
356f696a21cSArnd Bergmann ktime_get_real_ts64(&ts);
357215b13ddSRichard Cochran pct->sec = ts.tv_sec;
358215b13ddSRichard Cochran pct->nsec = ts.tv_nsec;
359c3484c27SRichard Cochran if (copy_to_user((void __user *)arg, sysoff, sizeof(*sysoff)))
360215b13ddSRichard Cochran err = -EFAULT;
361215b13ddSRichard Cochran break;
362215b13ddSRichard Cochran
3636092315dSRichard Cochran case PTP_PIN_GETFUNC:
36441560658SFelipe Balbi case PTP_PIN_GETFUNC2:
3656092315dSRichard Cochran if (copy_from_user(&pd, (void __user *)arg, sizeof(pd))) {
3666092315dSRichard Cochran err = -EFAULT;
3676092315dSRichard Cochran break;
3686092315dSRichard Cochran }
36941560658SFelipe Balbi if ((pd.rsv[0] || pd.rsv[1] || pd.rsv[2]
37041560658SFelipe Balbi || pd.rsv[3] || pd.rsv[4])
37141560658SFelipe Balbi && cmd == PTP_PIN_GETFUNC2) {
37241560658SFelipe Balbi err = -EINVAL;
37341560658SFelipe Balbi break;
37441560658SFelipe Balbi } else if (cmd == PTP_PIN_GETFUNC) {
37541560658SFelipe Balbi pd.rsv[0] = 0;
37641560658SFelipe Balbi pd.rsv[1] = 0;
37741560658SFelipe Balbi pd.rsv[2] = 0;
37841560658SFelipe Balbi pd.rsv[3] = 0;
37941560658SFelipe Balbi pd.rsv[4] = 0;
38041560658SFelipe Balbi }
3816092315dSRichard Cochran pin_index = pd.index;
3826092315dSRichard Cochran if (pin_index >= ops->n_pins) {
3836092315dSRichard Cochran err = -EINVAL;
3846092315dSRichard Cochran break;
3856092315dSRichard Cochran }
386efa61c8cSGustavo A. R. Silva pin_index = array_index_nospec(pin_index, ops->n_pins);
3876092315dSRichard Cochran if (mutex_lock_interruptible(&ptp->pincfg_mux))
3886092315dSRichard Cochran return -ERESTARTSYS;
3896092315dSRichard Cochran pd = ops->pin_config[pin_index];
3906092315dSRichard Cochran mutex_unlock(&ptp->pincfg_mux);
3916092315dSRichard Cochran if (!err && copy_to_user((void __user *)arg, &pd, sizeof(pd)))
3926092315dSRichard Cochran err = -EFAULT;
3936092315dSRichard Cochran break;
3946092315dSRichard Cochran
3956092315dSRichard Cochran case PTP_PIN_SETFUNC:
39641560658SFelipe Balbi case PTP_PIN_SETFUNC2:
3976092315dSRichard Cochran if (copy_from_user(&pd, (void __user *)arg, sizeof(pd))) {
3986092315dSRichard Cochran err = -EFAULT;
3996092315dSRichard Cochran break;
4006092315dSRichard Cochran }
40141560658SFelipe Balbi if ((pd.rsv[0] || pd.rsv[1] || pd.rsv[2]
40241560658SFelipe Balbi || pd.rsv[3] || pd.rsv[4])
40341560658SFelipe Balbi && cmd == PTP_PIN_SETFUNC2) {
40441560658SFelipe Balbi err = -EINVAL;
40541560658SFelipe Balbi break;
40641560658SFelipe Balbi } else if (cmd == PTP_PIN_SETFUNC) {
40741560658SFelipe Balbi pd.rsv[0] = 0;
40841560658SFelipe Balbi pd.rsv[1] = 0;
40941560658SFelipe Balbi pd.rsv[2] = 0;
41041560658SFelipe Balbi pd.rsv[3] = 0;
41141560658SFelipe Balbi pd.rsv[4] = 0;
41241560658SFelipe Balbi }
4136092315dSRichard Cochran pin_index = pd.index;
4146092315dSRichard Cochran if (pin_index >= ops->n_pins) {
4156092315dSRichard Cochran err = -EINVAL;
4166092315dSRichard Cochran break;
4176092315dSRichard Cochran }
418efa61c8cSGustavo A. R. Silva pin_index = array_index_nospec(pin_index, ops->n_pins);
4196092315dSRichard Cochran if (mutex_lock_interruptible(&ptp->pincfg_mux))
4206092315dSRichard Cochran return -ERESTARTSYS;
4216092315dSRichard Cochran err = ptp_set_pinfunc(ptp, pin_index, pd.func, pd.chan);
4226092315dSRichard Cochran mutex_unlock(&ptp->pincfg_mux);
4236092315dSRichard Cochran break;
4246092315dSRichard Cochran
425d94ba80eSRichard Cochran default:
426d94ba80eSRichard Cochran err = -ENOTTY;
427d94ba80eSRichard Cochran break;
428d94ba80eSRichard Cochran }
429c3484c27SRichard Cochran
43083d0bdc7SMiroslav Lichvar out:
43136180087SMiroslav Lichvar kfree(extoff);
432c3484c27SRichard Cochran kfree(sysoff);
433d94ba80eSRichard Cochran return err;
434d94ba80eSRichard Cochran }
435d94ba80eSRichard Cochran
ptp_poll(struct posix_clock * pc,struct file * fp,poll_table * wait)436afc9a42bSAl Viro __poll_t ptp_poll(struct posix_clock *pc, struct file *fp, poll_table *wait)
437d94ba80eSRichard Cochran {
438d94ba80eSRichard Cochran struct ptp_clock *ptp = container_of(pc, struct ptp_clock, clock);
439d94ba80eSRichard Cochran
440d94ba80eSRichard Cochran poll_wait(fp, &ptp->tsev_wq, wait);
441d94ba80eSRichard Cochran
442a9a08845SLinus Torvalds return queue_cnt(&ptp->tsevq) ? EPOLLIN : 0;
443d94ba80eSRichard Cochran }
444d94ba80eSRichard Cochran
445c7ec0badSRichard Cochran #define EXTTS_BUFSIZE (PTP_BUF_TIMESTAMPS * sizeof(struct ptp_extts_event))
446c7ec0badSRichard Cochran
ptp_read(struct posix_clock * pc,uint rdflags,char __user * buf,size_t cnt)447d94ba80eSRichard Cochran ssize_t ptp_read(struct posix_clock *pc,
448d94ba80eSRichard Cochran uint rdflags, char __user *buf, size_t cnt)
449d94ba80eSRichard Cochran {
450d94ba80eSRichard Cochran struct ptp_clock *ptp = container_of(pc, struct ptp_clock, clock);
451d94ba80eSRichard Cochran struct timestamp_event_queue *queue = &ptp->tsevq;
452c7ec0badSRichard Cochran struct ptp_extts_event *event;
453d94ba80eSRichard Cochran unsigned long flags;
454d94ba80eSRichard Cochran size_t qcnt, i;
455c7ec0badSRichard Cochran int result;
456d94ba80eSRichard Cochran
457d94ba80eSRichard Cochran if (cnt % sizeof(struct ptp_extts_event) != 0)
458d94ba80eSRichard Cochran return -EINVAL;
459d94ba80eSRichard Cochran
460c7ec0badSRichard Cochran if (cnt > EXTTS_BUFSIZE)
461c7ec0badSRichard Cochran cnt = EXTTS_BUFSIZE;
462d94ba80eSRichard Cochran
463d94ba80eSRichard Cochran cnt = cnt / sizeof(struct ptp_extts_event);
464d94ba80eSRichard Cochran
465d94ba80eSRichard Cochran if (mutex_lock_interruptible(&ptp->tsevq_mux))
466d94ba80eSRichard Cochran return -ERESTARTSYS;
467d94ba80eSRichard Cochran
468d94ba80eSRichard Cochran if (wait_event_interruptible(ptp->tsev_wq,
469d94ba80eSRichard Cochran ptp->defunct || queue_cnt(queue))) {
470d94ba80eSRichard Cochran mutex_unlock(&ptp->tsevq_mux);
471d94ba80eSRichard Cochran return -ERESTARTSYS;
472d94ba80eSRichard Cochran }
473d94ba80eSRichard Cochran
474fb5a18cfSDan Carpenter if (ptp->defunct) {
475fb5a18cfSDan Carpenter mutex_unlock(&ptp->tsevq_mux);
476d94ba80eSRichard Cochran return -ENODEV;
477fb5a18cfSDan Carpenter }
478d94ba80eSRichard Cochran
479c7ec0badSRichard Cochran event = kmalloc(EXTTS_BUFSIZE, GFP_KERNEL);
480c7ec0badSRichard Cochran if (!event) {
481c7ec0badSRichard Cochran mutex_unlock(&ptp->tsevq_mux);
482c7ec0badSRichard Cochran return -ENOMEM;
483c7ec0badSRichard Cochran }
484c7ec0badSRichard Cochran
485d94ba80eSRichard Cochran spin_lock_irqsave(&queue->lock, flags);
486d94ba80eSRichard Cochran
487d94ba80eSRichard Cochran qcnt = queue_cnt(queue);
488d94ba80eSRichard Cochran
489d94ba80eSRichard Cochran if (cnt > qcnt)
490d94ba80eSRichard Cochran cnt = qcnt;
491d94ba80eSRichard Cochran
492d94ba80eSRichard Cochran for (i = 0; i < cnt; i++) {
493d94ba80eSRichard Cochran event[i] = queue->buf[queue->head];
494c8608558SEric Dumazet /* Paired with READ_ONCE() in queue_cnt() */
495c8608558SEric Dumazet WRITE_ONCE(queue->head, (queue->head + 1) % PTP_MAX_TIMESTAMPS);
496d94ba80eSRichard Cochran }
497d94ba80eSRichard Cochran
498d94ba80eSRichard Cochran spin_unlock_irqrestore(&queue->lock, flags);
499d94ba80eSRichard Cochran
500d94ba80eSRichard Cochran cnt = cnt * sizeof(struct ptp_extts_event);
501d94ba80eSRichard Cochran
502d94ba80eSRichard Cochran mutex_unlock(&ptp->tsevq_mux);
503d94ba80eSRichard Cochran
504c7ec0badSRichard Cochran result = cnt;
505fb5a18cfSDan Carpenter if (copy_to_user(buf, event, cnt))
506c7ec0badSRichard Cochran result = -EFAULT;
507d94ba80eSRichard Cochran
508c7ec0badSRichard Cochran kfree(event);
509c7ec0badSRichard Cochran return result;
510d94ba80eSRichard Cochran }
511