Author | Tokens | Token Proportion | Commits | Commit Proportion |
---|---|---|---|---|
Richard Cochran | 1791 | 53.40% | 8 | 20.51% |
Felipe Balbi | 445 | 13.27% | 1 | 2.56% |
Xabier Marquiegui | 345 | 10.29% | 5 | 12.82% |
Miroslav Lichvar | 304 | 9.06% | 4 | 10.26% |
Christopher S. Hall | 154 | 4.59% | 1 | 2.56% |
Vladimir Oltean | 146 | 4.35% | 2 | 5.13% |
Rahul Rameshbabu | 29 | 0.86% | 1 | 2.56% |
Edward Adam Davis | 28 | 0.83% | 1 | 2.56% |
Gustavo A. R. Silva | 26 | 0.78% | 2 | 5.13% |
Eugene Syromiatnikov | 21 | 0.63% | 1 | 2.56% |
Dan Carpenter | 15 | 0.45% | 3 | 7.69% |
Vincent Cheng | 12 | 0.36% | 1 | 2.56% |
Muhammad Falak R Wani | 12 | 0.36% | 1 | 2.56% |
Vlad Tsyrklevich | 7 | 0.21% | 1 | 2.56% |
Stefan Sörensen | 6 | 0.18% | 1 | 2.56% |
Eric Dumazet | 5 | 0.15% | 1 | 2.56% |
Jacob E Keller | 2 | 0.06% | 1 | 2.56% |
Thomas Gleixner | 2 | 0.06% | 1 | 2.56% |
Arnd Bergmann | 2 | 0.06% | 1 | 2.56% |
Linus Torvalds | 1 | 0.03% | 1 | 2.56% |
Al Viro | 1 | 0.03% | 1 | 2.56% |
Total | 3354 | 39 |
// 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/debugfs.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_context *pccontext, fmode_t fmode) { struct ptp_clock *ptp = container_of(pccontext->clk, struct ptp_clock, clock); struct timestamp_event_queue *queue; char debugfsname[32]; unsigned long flags; queue = kzalloc(sizeof(*queue), GFP_KERNEL); if (!queue) return -EINVAL; queue->mask = bitmap_alloc(PTP_MAX_CHANNELS, GFP_KERNEL); if (!queue->mask) { kfree(queue); return -EINVAL; } bitmap_set(queue->mask, 0, PTP_MAX_CHANNELS); spin_lock_init(&queue->lock); spin_lock_irqsave(&ptp->tsevqs_lock, flags); list_add_tail(&queue->qlist, &ptp->tsevqs); spin_unlock_irqrestore(&ptp->tsevqs_lock, flags); pccontext->private_clkdata = queue; /* Debugfs contents */ sprintf(debugfsname, "0x%p", queue); queue->debugfs_instance = debugfs_create_dir(debugfsname, ptp->debugfs_root); queue->dfs_bitmap.array = (u32 *)queue->mask; queue->dfs_bitmap.n_elements = DIV_ROUND_UP(PTP_MAX_CHANNELS, BITS_PER_BYTE * sizeof(u32)); debugfs_create_u32_array("mask", 0444, queue->debugfs_instance, &queue->dfs_bitmap); return 0; } int ptp_release(struct posix_clock_context *pccontext) { struct timestamp_event_queue *queue = pccontext->private_clkdata; unsigned long flags; struct ptp_clock *ptp = container_of(pccontext->clk, struct ptp_clock, clock); debugfs_remove(queue->debugfs_instance); pccontext->private_clkdata = NULL; spin_lock_irqsave(&ptp->tsevqs_lock, flags); list_del(&queue->qlist); spin_unlock_irqrestore(&ptp->tsevqs_lock, flags); bitmap_free(queue->mask); kfree(queue); return 0; } long ptp_ioctl(struct posix_clock_context *pccontext, unsigned int cmd, unsigned long arg) { struct ptp_clock *ptp = container_of(pccontext->clk, 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 timestamp_event_queue *tsevq; 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; tsevq = pccontext->private_clkdata; 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 && ptp->info->getmaxphase != NULL; if (caps.adjust_phase) caps.max_phase_adj = ptp->info->getmaxphase(ptp->info); 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; case PTP_MASK_CLEAR_ALL: bitmap_clear(tsevq->mask, 0, PTP_MAX_CHANNELS); break; case PTP_MASK_EN_SINGLE: if (copy_from_user(&i, (void __user *)arg, sizeof(i))) { err = -EFAULT; break; } if (i >= PTP_MAX_CHANNELS) { err = -EFAULT; break; } set_bit(i, tsevq->mask); break; default: err = -ENOTTY; break; } out: kfree(extoff); kfree(sysoff); return err; } __poll_t ptp_poll(struct posix_clock_context *pccontext, struct file *fp, poll_table *wait) { struct ptp_clock *ptp = container_of(pccontext->clk, struct ptp_clock, clock); struct timestamp_event_queue *queue; queue = pccontext->private_clkdata; if (!queue) return EPOLLERR; poll_wait(fp, &ptp->tsev_wq, wait); return queue_cnt(queue) ? EPOLLIN : 0; } #define EXTTS_BUFSIZE (PTP_BUF_TIMESTAMPS * sizeof(struct ptp_extts_event)) ssize_t ptp_read(struct posix_clock_context *pccontext, uint rdflags, char __user *buf, size_t cnt) { struct ptp_clock *ptp = container_of(pccontext->clk, struct ptp_clock, clock); struct timestamp_event_queue *queue; struct ptp_extts_event *event; unsigned long flags; size_t qcnt, i; int result; queue = pccontext->private_clkdata; if (!queue) { result = -EINVAL; goto exit; } if (cnt % sizeof(struct ptp_extts_event) != 0) { result = -EINVAL; goto exit; } if (cnt > EXTTS_BUFSIZE) cnt = EXTTS_BUFSIZE; cnt = cnt / sizeof(struct ptp_extts_event); if (wait_event_interruptible(ptp->tsev_wq, ptp->defunct || queue_cnt(queue))) { return -ERESTARTSYS; } if (ptp->defunct) { result = -ENODEV; goto exit; } event = kmalloc(EXTTS_BUFSIZE, GFP_KERNEL); if (!event) { result = -ENOMEM; goto exit; } 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]; /* Paired with READ_ONCE() in queue_cnt() */ WRITE_ONCE(queue->head, (queue->head + 1) % PTP_MAX_TIMESTAMPS); } spin_unlock_irqrestore(&queue->lock, flags); cnt = cnt * sizeof(struct ptp_extts_event); result = cnt; if (copy_to_user(buf, event, cnt)) { result = -EFAULT; goto free_event; } free_event: kfree(event); exit: return result; }
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