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 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 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)) { 876092315dSRichard Cochran pr_err("driver cannot use function %u on pin %u\n", func, chan); 886092315dSRichard Cochran return -EOPNOTSUPP; 896092315dSRichard Cochran } 906092315dSRichard Cochran 916092315dSRichard Cochran /* Disable whatever function was previously assigned. */ 926092315dSRichard Cochran if (pin1) { 936092315dSRichard Cochran ptp_disable_pinfunc(info, func, chan); 946092315dSRichard Cochran pin1->func = PTP_PF_NONE; 956092315dSRichard Cochran pin1->chan = 0; 966092315dSRichard Cochran } 976092315dSRichard Cochran ptp_disable_pinfunc(info, pin2->func, pin2->chan); 986092315dSRichard Cochran pin2->func = func; 996092315dSRichard Cochran pin2->chan = chan; 1006092315dSRichard Cochran 1016092315dSRichard Cochran return 0; 1026092315dSRichard Cochran } 1036092315dSRichard Cochran 104d94ba80eSRichard Cochran int ptp_open(struct posix_clock *pc, fmode_t fmode) 105d94ba80eSRichard Cochran { 106d94ba80eSRichard Cochran return 0; 107d94ba80eSRichard Cochran } 108d94ba80eSRichard Cochran 109d94ba80eSRichard Cochran long ptp_ioctl(struct posix_clock *pc, unsigned int cmd, unsigned long arg) 110d94ba80eSRichard Cochran { 111d94ba80eSRichard Cochran struct ptp_clock *ptp = container_of(pc, struct ptp_clock, clock); 11236180087SMiroslav Lichvar struct ptp_sys_offset_extended *extoff = NULL; 113fbb960acSMiroslav Lichvar struct ptp_sys_offset_precise precise_offset; 114719f1aa4SChristopher S. Hall struct system_device_crosststamp xtstamp; 115fbb960acSMiroslav Lichvar struct ptp_clock_info *ops = ptp->info; 116fbb960acSMiroslav Lichvar struct ptp_sys_offset *sysoff = NULL; 11736180087SMiroslav Lichvar struct ptp_system_timestamp sts; 118fbb960acSMiroslav Lichvar struct ptp_clock_request req; 119fbb960acSMiroslav Lichvar struct ptp_clock_caps caps; 120fbb960acSMiroslav Lichvar struct ptp_clock_time *pct; 1216092315dSRichard Cochran unsigned int i, pin_index; 122fbb960acSMiroslav Lichvar struct ptp_pin_desc pd; 123fbb960acSMiroslav Lichvar struct timespec64 ts; 124fbb960acSMiroslav Lichvar int enable, err = 0; 125d94ba80eSRichard Cochran 126d94ba80eSRichard Cochran switch (cmd) { 127d94ba80eSRichard Cochran 128d94ba80eSRichard Cochran case PTP_CLOCK_GETCAPS: 12941560658SFelipe Balbi case PTP_CLOCK_GETCAPS2: 130d94ba80eSRichard Cochran memset(&caps, 0, sizeof(caps)); 13141560658SFelipe Balbi 132d94ba80eSRichard Cochran caps.max_adj = ptp->info->max_adj; 133d94ba80eSRichard Cochran caps.n_alarm = ptp->info->n_alarm; 134d94ba80eSRichard Cochran caps.n_ext_ts = ptp->info->n_ext_ts; 135d94ba80eSRichard Cochran caps.n_per_out = ptp->info->n_per_out; 136d94ba80eSRichard Cochran caps.pps = ptp->info->pps; 1376092315dSRichard Cochran caps.n_pins = ptp->info->n_pins; 138719f1aa4SChristopher S. Hall caps.cross_timestamping = ptp->info->getcrosststamp != NULL; 139e23ef227SDan Carpenter if (copy_to_user((void __user *)arg, &caps, sizeof(caps))) 140e23ef227SDan Carpenter err = -EFAULT; 141d94ba80eSRichard Cochran break; 142d94ba80eSRichard Cochran 143d94ba80eSRichard Cochran case PTP_EXTTS_REQUEST: 14441560658SFelipe Balbi case PTP_EXTTS_REQUEST2: 14541560658SFelipe Balbi memset(&req, 0, sizeof(req)); 14641560658SFelipe Balbi 147d94ba80eSRichard Cochran if (copy_from_user(&req.extts, (void __user *)arg, 148d94ba80eSRichard Cochran sizeof(req.extts))) { 149d94ba80eSRichard Cochran err = -EFAULT; 150d94ba80eSRichard Cochran break; 151d94ba80eSRichard Cochran } 152cd734d54SRichard Cochran if (cmd == PTP_EXTTS_REQUEST2) { 1536138e687SRichard Cochran /* Tell the drivers to check the flags carefully. */ 1546138e687SRichard Cochran req.extts.flags |= PTP_STRICT_FLAGS; 155cd734d54SRichard Cochran /* Make sure no reserved bit is set. */ 156cd734d54SRichard Cochran if ((req.extts.flags & ~PTP_EXTTS_VALID_FLAGS) || 157cd734d54SRichard Cochran req.extts.rsv[0] || req.extts.rsv[1]) { 15841560658SFelipe Balbi err = -EINVAL; 15941560658SFelipe Balbi break; 160cd734d54SRichard Cochran } 161cd734d54SRichard Cochran /* Ensure one of the rising/falling edge bits is set. */ 162cd734d54SRichard Cochran if ((req.extts.flags & PTP_ENABLE_FEATURE) && 163cd734d54SRichard Cochran (req.extts.flags & PTP_EXTTS_EDGES) == 0) { 164cd734d54SRichard Cochran err = -EINVAL; 165cd734d54SRichard Cochran break; 166cd734d54SRichard Cochran } 16741560658SFelipe Balbi } else if (cmd == PTP_EXTTS_REQUEST) { 1682df4de16SJacob Keller req.extts.flags &= PTP_EXTTS_V1_VALID_FLAGS; 16941560658SFelipe Balbi req.extts.rsv[0] = 0; 17041560658SFelipe Balbi req.extts.rsv[1] = 0; 17141560658SFelipe Balbi } 172d94ba80eSRichard Cochran if (req.extts.index >= ops->n_ext_ts) { 173d94ba80eSRichard Cochran err = -EINVAL; 174d94ba80eSRichard Cochran break; 175d94ba80eSRichard Cochran } 176d94ba80eSRichard Cochran req.type = PTP_CLK_REQ_EXTTS; 177d94ba80eSRichard Cochran enable = req.extts.flags & PTP_ENABLE_FEATURE ? 1 : 0; 178d94ba80eSRichard Cochran err = ops->enable(ops, &req, enable); 179d94ba80eSRichard Cochran break; 180d94ba80eSRichard Cochran 181d94ba80eSRichard Cochran case PTP_PEROUT_REQUEST: 18241560658SFelipe Balbi case PTP_PEROUT_REQUEST2: 18341560658SFelipe Balbi memset(&req, 0, sizeof(req)); 18441560658SFelipe Balbi 185d94ba80eSRichard Cochran if (copy_from_user(&req.perout, (void __user *)arg, 186d94ba80eSRichard Cochran sizeof(req.perout))) { 187d94ba80eSRichard Cochran err = -EFAULT; 188d94ba80eSRichard Cochran break; 189d94ba80eSRichard Cochran } 19041560658SFelipe Balbi if (((req.perout.flags & ~PTP_PEROUT_VALID_FLAGS) || 19141560658SFelipe Balbi req.perout.rsv[0] || req.perout.rsv[1] || 19241560658SFelipe Balbi req.perout.rsv[2] || req.perout.rsv[3]) && 19341560658SFelipe Balbi cmd == PTP_PEROUT_REQUEST2) { 19441560658SFelipe Balbi err = -EINVAL; 19541560658SFelipe Balbi break; 19641560658SFelipe Balbi } else if (cmd == PTP_PEROUT_REQUEST) { 1972df4de16SJacob Keller req.perout.flags &= PTP_PEROUT_V1_VALID_FLAGS; 19841560658SFelipe Balbi req.perout.rsv[0] = 0; 19941560658SFelipe Balbi req.perout.rsv[1] = 0; 20041560658SFelipe Balbi req.perout.rsv[2] = 0; 20141560658SFelipe Balbi req.perout.rsv[3] = 0; 20241560658SFelipe Balbi } 203d94ba80eSRichard Cochran if (req.perout.index >= ops->n_per_out) { 204d94ba80eSRichard Cochran err = -EINVAL; 205d94ba80eSRichard Cochran break; 206d94ba80eSRichard Cochran } 207d94ba80eSRichard Cochran req.type = PTP_CLK_REQ_PEROUT; 208d94ba80eSRichard Cochran enable = req.perout.period.sec || req.perout.period.nsec; 209d94ba80eSRichard Cochran err = ops->enable(ops, &req, enable); 210d94ba80eSRichard Cochran break; 211d94ba80eSRichard Cochran 212d94ba80eSRichard Cochran case PTP_ENABLE_PPS: 21341560658SFelipe Balbi case PTP_ENABLE_PPS2: 21441560658SFelipe Balbi memset(&req, 0, sizeof(req)); 21541560658SFelipe Balbi 216d94ba80eSRichard Cochran if (!capable(CAP_SYS_TIME)) 217d94ba80eSRichard Cochran return -EPERM; 218d94ba80eSRichard Cochran req.type = PTP_CLK_REQ_PPS; 219d94ba80eSRichard Cochran enable = arg ? 1 : 0; 220d94ba80eSRichard Cochran err = ops->enable(ops, &req, enable); 221d94ba80eSRichard Cochran break; 222d94ba80eSRichard Cochran 223719f1aa4SChristopher S. Hall case PTP_SYS_OFFSET_PRECISE: 22441560658SFelipe Balbi case PTP_SYS_OFFSET_PRECISE2: 225719f1aa4SChristopher S. Hall if (!ptp->info->getcrosststamp) { 226719f1aa4SChristopher S. Hall err = -EOPNOTSUPP; 227719f1aa4SChristopher S. Hall break; 228719f1aa4SChristopher S. Hall } 229719f1aa4SChristopher S. Hall err = ptp->info->getcrosststamp(ptp->info, &xtstamp); 230719f1aa4SChristopher S. Hall if (err) 231719f1aa4SChristopher S. Hall break; 232719f1aa4SChristopher S. Hall 23302a9079cSVlad Tsyrklevich memset(&precise_offset, 0, sizeof(precise_offset)); 234719f1aa4SChristopher S. Hall ts = ktime_to_timespec64(xtstamp.device); 235719f1aa4SChristopher S. Hall precise_offset.device.sec = ts.tv_sec; 236719f1aa4SChristopher S. Hall precise_offset.device.nsec = ts.tv_nsec; 237719f1aa4SChristopher S. Hall ts = ktime_to_timespec64(xtstamp.sys_realtime); 238719f1aa4SChristopher S. Hall precise_offset.sys_realtime.sec = ts.tv_sec; 239719f1aa4SChristopher S. Hall precise_offset.sys_realtime.nsec = ts.tv_nsec; 240719f1aa4SChristopher S. Hall ts = ktime_to_timespec64(xtstamp.sys_monoraw); 241719f1aa4SChristopher S. Hall precise_offset.sys_monoraw.sec = ts.tv_sec; 242719f1aa4SChristopher S. Hall precise_offset.sys_monoraw.nsec = ts.tv_nsec; 243719f1aa4SChristopher S. Hall if (copy_to_user((void __user *)arg, &precise_offset, 244719f1aa4SChristopher S. Hall sizeof(precise_offset))) 245719f1aa4SChristopher S. Hall err = -EFAULT; 246719f1aa4SChristopher S. Hall break; 247719f1aa4SChristopher S. Hall 24836180087SMiroslav Lichvar case PTP_SYS_OFFSET_EXTENDED: 24941560658SFelipe Balbi case PTP_SYS_OFFSET_EXTENDED2: 25036180087SMiroslav Lichvar if (!ptp->info->gettimex64) { 25136180087SMiroslav Lichvar err = -EOPNOTSUPP; 25236180087SMiroslav Lichvar break; 25336180087SMiroslav Lichvar } 25436180087SMiroslav Lichvar extoff = memdup_user((void __user *)arg, sizeof(*extoff)); 25536180087SMiroslav Lichvar if (IS_ERR(extoff)) { 25636180087SMiroslav Lichvar err = PTR_ERR(extoff); 25736180087SMiroslav Lichvar extoff = NULL; 25836180087SMiroslav Lichvar break; 25936180087SMiroslav Lichvar } 260895ac137SEugene Syromiatnikov if (extoff->n_samples > PTP_MAX_SAMPLES 261895ac137SEugene Syromiatnikov || extoff->rsv[0] || extoff->rsv[1] || extoff->rsv[2]) { 26236180087SMiroslav Lichvar err = -EINVAL; 26336180087SMiroslav Lichvar break; 26436180087SMiroslav Lichvar } 26536180087SMiroslav Lichvar for (i = 0; i < extoff->n_samples; i++) { 26636180087SMiroslav Lichvar err = ptp->info->gettimex64(ptp->info, &ts, &sts); 26736180087SMiroslav Lichvar if (err) 26836180087SMiroslav Lichvar goto out; 26936180087SMiroslav Lichvar extoff->ts[i][0].sec = sts.pre_ts.tv_sec; 27036180087SMiroslav Lichvar extoff->ts[i][0].nsec = sts.pre_ts.tv_nsec; 27136180087SMiroslav Lichvar extoff->ts[i][1].sec = ts.tv_sec; 27236180087SMiroslav Lichvar extoff->ts[i][1].nsec = ts.tv_nsec; 27336180087SMiroslav Lichvar extoff->ts[i][2].sec = sts.post_ts.tv_sec; 27436180087SMiroslav Lichvar extoff->ts[i][2].nsec = sts.post_ts.tv_nsec; 27536180087SMiroslav Lichvar } 27636180087SMiroslav Lichvar if (copy_to_user((void __user *)arg, extoff, sizeof(*extoff))) 27736180087SMiroslav Lichvar err = -EFAULT; 27836180087SMiroslav Lichvar break; 27936180087SMiroslav Lichvar 280215b13ddSRichard Cochran case PTP_SYS_OFFSET: 28141560658SFelipe Balbi case PTP_SYS_OFFSET2: 2822ece068eSMuhammad Falak R Wani sysoff = memdup_user((void __user *)arg, sizeof(*sysoff)); 2832ece068eSMuhammad Falak R Wani if (IS_ERR(sysoff)) { 2842ece068eSMuhammad Falak R Wani err = PTR_ERR(sysoff); 2856756325aSDan Carpenter sysoff = NULL; 286215b13ddSRichard Cochran break; 287215b13ddSRichard Cochran } 288c3484c27SRichard Cochran if (sysoff->n_samples > PTP_MAX_SAMPLES) { 289215b13ddSRichard Cochran err = -EINVAL; 290215b13ddSRichard Cochran break; 291215b13ddSRichard Cochran } 292c3484c27SRichard Cochran pct = &sysoff->ts[0]; 293c3484c27SRichard Cochran for (i = 0; i < sysoff->n_samples; i++) { 294f696a21cSArnd Bergmann ktime_get_real_ts64(&ts); 295215b13ddSRichard Cochran pct->sec = ts.tv_sec; 296215b13ddSRichard Cochran pct->nsec = ts.tv_nsec; 297215b13ddSRichard Cochran pct++; 298916444dfSMiroslav Lichvar if (ops->gettimex64) 299916444dfSMiroslav Lichvar err = ops->gettimex64(ops, &ts, NULL); 300916444dfSMiroslav Lichvar else 301916444dfSMiroslav Lichvar err = ops->gettime64(ops, &ts); 30283d0bdc7SMiroslav Lichvar if (err) 30383d0bdc7SMiroslav Lichvar goto out; 304215b13ddSRichard Cochran pct->sec = ts.tv_sec; 305215b13ddSRichard Cochran pct->nsec = ts.tv_nsec; 306215b13ddSRichard Cochran pct++; 307215b13ddSRichard Cochran } 308f696a21cSArnd Bergmann ktime_get_real_ts64(&ts); 309215b13ddSRichard Cochran pct->sec = ts.tv_sec; 310215b13ddSRichard Cochran pct->nsec = ts.tv_nsec; 311c3484c27SRichard Cochran if (copy_to_user((void __user *)arg, sysoff, sizeof(*sysoff))) 312215b13ddSRichard Cochran err = -EFAULT; 313215b13ddSRichard Cochran break; 314215b13ddSRichard Cochran 3156092315dSRichard Cochran case PTP_PIN_GETFUNC: 31641560658SFelipe Balbi case PTP_PIN_GETFUNC2: 3176092315dSRichard Cochran if (copy_from_user(&pd, (void __user *)arg, sizeof(pd))) { 3186092315dSRichard Cochran err = -EFAULT; 3196092315dSRichard Cochran break; 3206092315dSRichard Cochran } 32141560658SFelipe Balbi if ((pd.rsv[0] || pd.rsv[1] || pd.rsv[2] 32241560658SFelipe Balbi || pd.rsv[3] || pd.rsv[4]) 32341560658SFelipe Balbi && cmd == PTP_PIN_GETFUNC2) { 32441560658SFelipe Balbi err = -EINVAL; 32541560658SFelipe Balbi break; 32641560658SFelipe Balbi } else if (cmd == PTP_PIN_GETFUNC) { 32741560658SFelipe Balbi pd.rsv[0] = 0; 32841560658SFelipe Balbi pd.rsv[1] = 0; 32941560658SFelipe Balbi pd.rsv[2] = 0; 33041560658SFelipe Balbi pd.rsv[3] = 0; 33141560658SFelipe Balbi pd.rsv[4] = 0; 33241560658SFelipe Balbi } 3336092315dSRichard Cochran pin_index = pd.index; 3346092315dSRichard Cochran if (pin_index >= ops->n_pins) { 3356092315dSRichard Cochran err = -EINVAL; 3366092315dSRichard Cochran break; 3376092315dSRichard Cochran } 338efa61c8cSGustavo A. R. Silva pin_index = array_index_nospec(pin_index, ops->n_pins); 3396092315dSRichard Cochran if (mutex_lock_interruptible(&ptp->pincfg_mux)) 3406092315dSRichard Cochran return -ERESTARTSYS; 3416092315dSRichard Cochran pd = ops->pin_config[pin_index]; 3426092315dSRichard Cochran mutex_unlock(&ptp->pincfg_mux); 3436092315dSRichard Cochran if (!err && copy_to_user((void __user *)arg, &pd, sizeof(pd))) 3446092315dSRichard Cochran err = -EFAULT; 3456092315dSRichard Cochran break; 3466092315dSRichard Cochran 3476092315dSRichard Cochran case PTP_PIN_SETFUNC: 34841560658SFelipe Balbi case PTP_PIN_SETFUNC2: 3496092315dSRichard Cochran if (copy_from_user(&pd, (void __user *)arg, sizeof(pd))) { 3506092315dSRichard Cochran err = -EFAULT; 3516092315dSRichard Cochran break; 3526092315dSRichard Cochran } 35341560658SFelipe Balbi if ((pd.rsv[0] || pd.rsv[1] || pd.rsv[2] 35441560658SFelipe Balbi || pd.rsv[3] || pd.rsv[4]) 35541560658SFelipe Balbi && cmd == PTP_PIN_SETFUNC2) { 35641560658SFelipe Balbi err = -EINVAL; 35741560658SFelipe Balbi break; 35841560658SFelipe Balbi } else if (cmd == PTP_PIN_SETFUNC) { 35941560658SFelipe Balbi pd.rsv[0] = 0; 36041560658SFelipe Balbi pd.rsv[1] = 0; 36141560658SFelipe Balbi pd.rsv[2] = 0; 36241560658SFelipe Balbi pd.rsv[3] = 0; 36341560658SFelipe Balbi pd.rsv[4] = 0; 36441560658SFelipe Balbi } 3656092315dSRichard Cochran pin_index = pd.index; 3666092315dSRichard Cochran if (pin_index >= ops->n_pins) { 3676092315dSRichard Cochran err = -EINVAL; 3686092315dSRichard Cochran break; 3696092315dSRichard Cochran } 370efa61c8cSGustavo A. R. Silva pin_index = array_index_nospec(pin_index, ops->n_pins); 3716092315dSRichard Cochran if (mutex_lock_interruptible(&ptp->pincfg_mux)) 3726092315dSRichard Cochran return -ERESTARTSYS; 3736092315dSRichard Cochran err = ptp_set_pinfunc(ptp, pin_index, pd.func, pd.chan); 3746092315dSRichard Cochran mutex_unlock(&ptp->pincfg_mux); 3756092315dSRichard Cochran break; 3766092315dSRichard Cochran 377d94ba80eSRichard Cochran default: 378d94ba80eSRichard Cochran err = -ENOTTY; 379d94ba80eSRichard Cochran break; 380d94ba80eSRichard Cochran } 381c3484c27SRichard Cochran 38283d0bdc7SMiroslav Lichvar out: 38336180087SMiroslav Lichvar kfree(extoff); 384c3484c27SRichard Cochran kfree(sysoff); 385d94ba80eSRichard Cochran return err; 386d94ba80eSRichard Cochran } 387d94ba80eSRichard Cochran 388afc9a42bSAl Viro __poll_t ptp_poll(struct posix_clock *pc, struct file *fp, poll_table *wait) 389d94ba80eSRichard Cochran { 390d94ba80eSRichard Cochran struct ptp_clock *ptp = container_of(pc, struct ptp_clock, clock); 391d94ba80eSRichard Cochran 392d94ba80eSRichard Cochran poll_wait(fp, &ptp->tsev_wq, wait); 393d94ba80eSRichard Cochran 394a9a08845SLinus Torvalds return queue_cnt(&ptp->tsevq) ? EPOLLIN : 0; 395d94ba80eSRichard Cochran } 396d94ba80eSRichard Cochran 397c7ec0badSRichard Cochran #define EXTTS_BUFSIZE (PTP_BUF_TIMESTAMPS * sizeof(struct ptp_extts_event)) 398c7ec0badSRichard Cochran 399d94ba80eSRichard Cochran ssize_t ptp_read(struct posix_clock *pc, 400d94ba80eSRichard Cochran uint rdflags, char __user *buf, size_t cnt) 401d94ba80eSRichard Cochran { 402d94ba80eSRichard Cochran struct ptp_clock *ptp = container_of(pc, struct ptp_clock, clock); 403d94ba80eSRichard Cochran struct timestamp_event_queue *queue = &ptp->tsevq; 404c7ec0badSRichard Cochran struct ptp_extts_event *event; 405d94ba80eSRichard Cochran unsigned long flags; 406d94ba80eSRichard Cochran size_t qcnt, i; 407c7ec0badSRichard Cochran int result; 408d94ba80eSRichard Cochran 409d94ba80eSRichard Cochran if (cnt % sizeof(struct ptp_extts_event) != 0) 410d94ba80eSRichard Cochran return -EINVAL; 411d94ba80eSRichard Cochran 412c7ec0badSRichard Cochran if (cnt > EXTTS_BUFSIZE) 413c7ec0badSRichard Cochran cnt = EXTTS_BUFSIZE; 414d94ba80eSRichard Cochran 415d94ba80eSRichard Cochran cnt = cnt / sizeof(struct ptp_extts_event); 416d94ba80eSRichard Cochran 417d94ba80eSRichard Cochran if (mutex_lock_interruptible(&ptp->tsevq_mux)) 418d94ba80eSRichard Cochran return -ERESTARTSYS; 419d94ba80eSRichard Cochran 420d94ba80eSRichard Cochran if (wait_event_interruptible(ptp->tsev_wq, 421d94ba80eSRichard Cochran ptp->defunct || queue_cnt(queue))) { 422d94ba80eSRichard Cochran mutex_unlock(&ptp->tsevq_mux); 423d94ba80eSRichard Cochran return -ERESTARTSYS; 424d94ba80eSRichard Cochran } 425d94ba80eSRichard Cochran 426fb5a18cfSDan Carpenter if (ptp->defunct) { 427fb5a18cfSDan Carpenter mutex_unlock(&ptp->tsevq_mux); 428d94ba80eSRichard Cochran return -ENODEV; 429fb5a18cfSDan Carpenter } 430d94ba80eSRichard Cochran 431c7ec0badSRichard Cochran event = kmalloc(EXTTS_BUFSIZE, GFP_KERNEL); 432c7ec0badSRichard Cochran if (!event) { 433c7ec0badSRichard Cochran mutex_unlock(&ptp->tsevq_mux); 434c7ec0badSRichard Cochran return -ENOMEM; 435c7ec0badSRichard Cochran } 436c7ec0badSRichard Cochran 437d94ba80eSRichard Cochran spin_lock_irqsave(&queue->lock, flags); 438d94ba80eSRichard Cochran 439d94ba80eSRichard Cochran qcnt = queue_cnt(queue); 440d94ba80eSRichard Cochran 441d94ba80eSRichard Cochran if (cnt > qcnt) 442d94ba80eSRichard Cochran cnt = qcnt; 443d94ba80eSRichard Cochran 444d94ba80eSRichard Cochran for (i = 0; i < cnt; i++) { 445d94ba80eSRichard Cochran event[i] = queue->buf[queue->head]; 446d94ba80eSRichard Cochran queue->head = (queue->head + 1) % PTP_MAX_TIMESTAMPS; 447d94ba80eSRichard Cochran } 448d94ba80eSRichard Cochran 449d94ba80eSRichard Cochran spin_unlock_irqrestore(&queue->lock, flags); 450d94ba80eSRichard Cochran 451d94ba80eSRichard Cochran cnt = cnt * sizeof(struct ptp_extts_event); 452d94ba80eSRichard Cochran 453d94ba80eSRichard Cochran mutex_unlock(&ptp->tsevq_mux); 454d94ba80eSRichard Cochran 455c7ec0badSRichard Cochran result = cnt; 456fb5a18cfSDan Carpenter if (copy_to_user(buf, event, cnt)) 457c7ec0badSRichard Cochran result = -EFAULT; 458d94ba80eSRichard Cochran 459c7ec0badSRichard Cochran kfree(event); 460c7ec0badSRichard Cochran return result; 461d94ba80eSRichard Cochran } 462