OSCL-LXR linux-6.0.1/​drivers/​net/​ethernet/​mellanox/​mlxsw/​spectrum_ptp.c	Source navigation Diff markup Identifier search General search
	Version: linux-6.0.1 spark-3.0.0 hadoop-3.2.0-src hadoop-3.3.0-src spark-2.4.7 linux-4.15.13 hadoop-2.7.4-src Revert   Change

 // SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
 /* Copyright (c) 2019 Mellanox Technologies. All rights reserved */
 
 #include <linux/ptp_clock_kernel.h>
 #include <linux/clocksource.h>
 #include <linux/timecounter.h>
 #include <linux/spinlock.h>
 #include <linux/device.h>
 #include <linux/rhashtable.h>
 #include <linux/ptp_classify.h>
 #include <linux/if_ether.h>
 #include <linux/if_vlan.h>
 #include <linux/net_tstamp.h>
 #include <linux/refcount.h>
 
 #include "spectrum.h"
 #include "spectrum_ptp.h"
 #include "core.h"
 
 #define MLXSW_SP1_PTP_CLOCK_CYCLES_SHIFT    29
 #define MLXSW_SP1_PTP_CLOCK_FREQ_KHZ        156257 /* 6.4nSec */
 #define MLXSW_SP1_PTP_CLOCK_MASK        64
 
 #define MLXSW_SP1_PTP_HT_GC_INTERVAL        500 /* ms */
 
 /* How long, approximately, should the unmatched entries stay in the hash table
  * before they are collected. Should be evenly divisible by the GC interval.
  */
 #define MLXSW_SP1_PTP_HT_GC_TIMEOUT     1000 /* ms */
 
 struct mlxsw_sp_ptp_state {
     struct mlxsw_sp *mlxsw_sp;
 };
 
 struct mlxsw_sp1_ptp_state {
     struct mlxsw_sp_ptp_state common;
     struct rhltable unmatched_ht;
     spinlock_t unmatched_lock; /* protects the HT */
     struct delayed_work ht_gc_dw;
     u32 gc_cycle;
 };
 
 struct mlxsw_sp2_ptp_state {
     struct mlxsw_sp_ptp_state common;
     refcount_t ptp_port_enabled_ref; /* Number of ports with time stamping
                       * enabled.
                       */
     struct hwtstamp_config config;
     struct mutex lock; /* Protects 'config' and HW configuration. */
 };
 
 struct mlxsw_sp1_ptp_key {
     u16 local_port;
     u8 message_type;
     u16 sequence_id;
     u8 domain_number;
     bool ingress;
 };
 
 struct mlxsw_sp1_ptp_unmatched {
     struct mlxsw_sp1_ptp_key key;
     struct rhlist_head ht_node;
     struct rcu_head rcu;
     struct sk_buff *skb;
     u64 timestamp;
     u32 gc_cycle;
 };
 
 static const struct rhashtable_params mlxsw_sp1_ptp_unmatched_ht_params = {
     .key_len = sizeof_field(struct mlxsw_sp1_ptp_unmatched, key),
     .key_offset = offsetof(struct mlxsw_sp1_ptp_unmatched, key),
     .head_offset = offsetof(struct mlxsw_sp1_ptp_unmatched, ht_node),
 };
 
 struct mlxsw_sp_ptp_clock {
     struct mlxsw_core *core;
     struct ptp_clock *ptp;
     struct ptp_clock_info ptp_info;
 };
 
 struct mlxsw_sp1_ptp_clock {
     struct mlxsw_sp_ptp_clock common;
     spinlock_t lock; /* protect this structure */
     struct cyclecounter cycles;
     struct timecounter tc;
     u32 nominal_c_mult;
     unsigned long overflow_period;
     struct delayed_work overflow_work;
 };
 
 static struct mlxsw_sp1_ptp_state *
 mlxsw_sp1_ptp_state(struct mlxsw_sp *mlxsw_sp)
 {
     return container_of(mlxsw_sp->ptp_state, struct mlxsw_sp1_ptp_state,
                 common);
 }
 
 static struct mlxsw_sp2_ptp_state *
 mlxsw_sp2_ptp_state(struct mlxsw_sp *mlxsw_sp)
 {
     return container_of(mlxsw_sp->ptp_state, struct mlxsw_sp2_ptp_state,
                 common);
 }
 
 static struct mlxsw_sp1_ptp_clock *
 mlxsw_sp1_ptp_clock(struct ptp_clock_info *ptp)
 {
     return container_of(ptp, struct mlxsw_sp1_ptp_clock, common.ptp_info);
 }
 
 static u64 __mlxsw_sp1_ptp_read_frc(struct mlxsw_sp1_ptp_clock *clock,
                     struct ptp_system_timestamp *sts)
 {
     struct mlxsw_core *mlxsw_core = clock->common.core;
     u32 frc_h1, frc_h2, frc_l;
 
     frc_h1 = mlxsw_core_read_frc_h(mlxsw_core);
     ptp_read_system_prets(sts);
     frc_l = mlxsw_core_read_frc_l(mlxsw_core);
     ptp_read_system_postts(sts);
     frc_h2 = mlxsw_core_read_frc_h(mlxsw_core);
 
     if (frc_h1 != frc_h2) {
         /* wrap around */
         ptp_read_system_prets(sts);
         frc_l = mlxsw_core_read_frc_l(mlxsw_core);
         ptp_read_system_postts(sts);
     }
 
     return (u64) frc_l | (u64) frc_h2 << 32;
 }
 
 static u64 mlxsw_sp1_ptp_read_frc(const struct cyclecounter *cc)
 {
     struct mlxsw_sp1_ptp_clock *clock =
         container_of(cc, struct mlxsw_sp1_ptp_clock, cycles);
 
     return __mlxsw_sp1_ptp_read_frc(clock, NULL) & cc->mask;
 }
 
 static int
 mlxsw_sp_ptp_phc_adjfreq(struct mlxsw_sp_ptp_clock *clock, int freq_adj)
 {
     struct mlxsw_core *mlxsw_core = clock->core;
     char mtutc_pl[MLXSW_REG_MTUTC_LEN];
 
     mlxsw_reg_mtutc_pack(mtutc_pl, MLXSW_REG_MTUTC_OPERATION_ADJUST_FREQ,
                  freq_adj, 0, 0, 0);
     return mlxsw_reg_write(mlxsw_core, MLXSW_REG(mtutc), mtutc_pl);
 }
 
 static u64 mlxsw_sp1_ptp_ns2cycles(const struct timecounter *tc, u64 nsec)
 {
     u64 cycles = (u64) nsec;
 
     cycles <<= tc->cc->shift;
     cycles = div_u64(cycles, tc->cc->mult);
 
     return cycles;
 }
 
 static int
 mlxsw_sp1_ptp_phc_settime(struct mlxsw_sp1_ptp_clock *clock, u64 nsec)
 {
     struct mlxsw_core *mlxsw_core = clock->common.core;
     u64 next_sec, next_sec_in_nsec, cycles;
     char mtutc_pl[MLXSW_REG_MTUTC_LEN];
     char mtpps_pl[MLXSW_REG_MTPPS_LEN];
     int err;
 
     next_sec = div_u64(nsec, NSEC_PER_SEC) + 1;
     next_sec_in_nsec = next_sec * NSEC_PER_SEC;
 
     spin_lock_bh(&clock->lock);
     cycles = mlxsw_sp1_ptp_ns2cycles(&clock->tc, next_sec_in_nsec);
     spin_unlock_bh(&clock->lock);
 
     mlxsw_reg_mtpps_vpin_pack(mtpps_pl, cycles);
     err = mlxsw_reg_write(mlxsw_core, MLXSW_REG(mtpps), mtpps_pl);
     if (err)
         return err;
 
     mlxsw_reg_mtutc_pack(mtutc_pl,
                  MLXSW_REG_MTUTC_OPERATION_SET_TIME_AT_NEXT_SEC,
                  0, next_sec, 0, 0);
     return mlxsw_reg_write(mlxsw_core, MLXSW_REG(mtutc), mtutc_pl);
 }
 
 static int mlxsw_sp1_ptp_adjfine(struct ptp_clock_info *ptp, long scaled_ppm)
 {
     struct mlxsw_sp1_ptp_clock *clock = mlxsw_sp1_ptp_clock(ptp);
     int neg_adj = 0;
     u32 diff;
     u64 adj;
     s32 ppb;
 
     ppb = scaled_ppm_to_ppb(scaled_ppm);
 
     if (ppb < 0) {
         neg_adj = 1;
         ppb = -ppb;
     }
 
     adj = clock->nominal_c_mult;
     adj *= ppb;
     diff = div_u64(adj, NSEC_PER_SEC);
 
     spin_lock_bh(&clock->lock);
     timecounter_read(&clock->tc);
     clock->cycles.mult = neg_adj ? clock->nominal_c_mult - diff :
                        clock->nominal_c_mult + diff;
     spin_unlock_bh(&clock->lock);
 
     return mlxsw_sp_ptp_phc_adjfreq(&clock->common, neg_adj ? -ppb : ppb);
 }
 
 static int mlxsw_sp1_ptp_adjtime(struct ptp_clock_info *ptp, s64 delta)
 {
     struct mlxsw_sp1_ptp_clock *clock = mlxsw_sp1_ptp_clock(ptp);
     u64 nsec;
 
     spin_lock_bh(&clock->lock);
     timecounter_adjtime(&clock->tc, delta);
     nsec = timecounter_read(&clock->tc);
     spin_unlock_bh(&clock->lock);
 
     return mlxsw_sp1_ptp_phc_settime(clock, nsec);
 }
 
 static int mlxsw_sp1_ptp_gettimex(struct ptp_clock_info *ptp,
                   struct timespec64 *ts,
                   struct ptp_system_timestamp *sts)
 {
     struct mlxsw_sp1_ptp_clock *clock = mlxsw_sp1_ptp_clock(ptp);
     u64 cycles, nsec;
 
     spin_lock_bh(&clock->lock);
     cycles = __mlxsw_sp1_ptp_read_frc(clock, sts);
     nsec = timecounter_cyc2time(&clock->tc, cycles);
     spin_unlock_bh(&clock->lock);
 
     *ts = ns_to_timespec64(nsec);
 
     return 0;
 }
 
 static int mlxsw_sp1_ptp_settime(struct ptp_clock_info *ptp,
                  const struct timespec64 *ts)
 {
     struct mlxsw_sp1_ptp_clock *clock = mlxsw_sp1_ptp_clock(ptp);
     u64 nsec = timespec64_to_ns(ts);
 
     spin_lock_bh(&clock->lock);
     timecounter_init(&clock->tc, &clock->cycles, nsec);
     nsec = timecounter_read(&clock->tc);
     spin_unlock_bh(&clock->lock);
 
     return mlxsw_sp1_ptp_phc_settime(clock, nsec);
 }
 
 static const struct ptp_clock_info mlxsw_sp1_ptp_clock_info = {
     .owner      = THIS_MODULE,
     .name       = "mlxsw_sp_clock",
     .max_adj    = 100000000,
     .adjfine    = mlxsw_sp1_ptp_adjfine,
     .adjtime    = mlxsw_sp1_ptp_adjtime,
     .gettimex64 = mlxsw_sp1_ptp_gettimex,
     .settime64  = mlxsw_sp1_ptp_settime,
 };
 
 static void mlxsw_sp1_ptp_clock_overflow(struct work_struct *work)
 {
     struct delayed_work *dwork = to_delayed_work(work);
     struct mlxsw_sp1_ptp_clock *clock;
 
     clock = container_of(dwork, struct mlxsw_sp1_ptp_clock, overflow_work);
 
     spin_lock_bh(&clock->lock);
     timecounter_read(&clock->tc);
     spin_unlock_bh(&clock->lock);
     mlxsw_core_schedule_dw(&clock->overflow_work, clock->overflow_period);
 }
 
 struct mlxsw_sp_ptp_clock *
 mlxsw_sp1_ptp_clock_init(struct mlxsw_sp *mlxsw_sp, struct device *dev)
 {
     u64 overflow_cycles, nsec, frac = 0;
     struct mlxsw_sp1_ptp_clock *clock;
     int err;
 
     clock = kzalloc(sizeof(*clock), GFP_KERNEL);
     if (!clock)
         return ERR_PTR(-ENOMEM);
 
     spin_lock_init(&clock->lock);
     clock->cycles.read = mlxsw_sp1_ptp_read_frc;
     clock->cycles.shift = MLXSW_SP1_PTP_CLOCK_CYCLES_SHIFT;
     clock->cycles.mult = clocksource_khz2mult(MLXSW_SP1_PTP_CLOCK_FREQ_KHZ,
                           clock->cycles.shift);
     clock->nominal_c_mult = clock->cycles.mult;
     clock->cycles.mask = CLOCKSOURCE_MASK(MLXSW_SP1_PTP_CLOCK_MASK);
     clock->common.core = mlxsw_sp->core;
 
     timecounter_init(&clock->tc, &clock->cycles, 0);
 
     /* Calculate period in seconds to call the overflow watchdog - to make
      * sure counter is checked at least twice every wrap around.
      * The period is calculated as the minimum between max HW cycles count
      * (The clock source mask) and max amount of cycles that can be
      * multiplied by clock multiplier where the result doesn't exceed
      * 64bits.
      */
     overflow_cycles = div64_u64(~0ULL >> 1, clock->cycles.mult);
     overflow_cycles = min(overflow_cycles, div_u64(clock->cycles.mask, 3));
 
     nsec = cyclecounter_cyc2ns(&clock->cycles, overflow_cycles, 0, &frac);
     clock->overflow_period = nsecs_to_jiffies(nsec);
 
     INIT_DELAYED_WORK(&clock->overflow_work, mlxsw_sp1_ptp_clock_overflow);
     mlxsw_core_schedule_dw(&clock->overflow_work, 0);
 
     clock->common.ptp_info = mlxsw_sp1_ptp_clock_info;
     clock->common.ptp = ptp_clock_register(&clock->common.ptp_info, dev);
     if (IS_ERR(clock->common.ptp)) {
         err = PTR_ERR(clock->common.ptp);
         dev_err(dev, "ptp_clock_register failed %d\n", err);
         goto err_ptp_clock_register;
     }
 
     return &clock->common;
 
 err_ptp_clock_register:
     cancel_delayed_work_sync(&clock->overflow_work);
     kfree(clock);
     return ERR_PTR(err);
 }
 
 void mlxsw_sp1_ptp_clock_fini(struct mlxsw_sp_ptp_clock *clock_common)
 {
     struct mlxsw_sp1_ptp_clock *clock =
         container_of(clock_common, struct mlxsw_sp1_ptp_clock, common);
 
     ptp_clock_unregister(clock_common->ptp);
     cancel_delayed_work_sync(&clock->overflow_work);
     kfree(clock);
 }
 
 static u64 mlxsw_sp2_ptp_read_utc(struct mlxsw_sp_ptp_clock *clock,
                   struct ptp_system_timestamp *sts)
 {
     struct mlxsw_core *mlxsw_core = clock->core;
     u32 utc_sec1, utc_sec2, utc_nsec;
 
     utc_sec1 = mlxsw_core_read_utc_sec(mlxsw_core);
     ptp_read_system_prets(sts);
     utc_nsec = mlxsw_core_read_utc_nsec(mlxsw_core);
     ptp_read_system_postts(sts);
     utc_sec2 = mlxsw_core_read_utc_sec(mlxsw_core);
 
     if (utc_sec1 != utc_sec2) {
         /* Wrap around. */
         ptp_read_system_prets(sts);
         utc_nsec = mlxsw_core_read_utc_nsec(mlxsw_core);
         ptp_read_system_postts(sts);
     }
 
     return (u64)utc_sec2 * NSEC_PER_SEC + utc_nsec;
 }
 
 static int
 mlxsw_sp2_ptp_phc_settime(struct mlxsw_sp_ptp_clock *clock, u64 nsec)
 {
     struct mlxsw_core *mlxsw_core = clock->core;
     char mtutc_pl[MLXSW_REG_MTUTC_LEN];
     u32 sec, nsec_rem;
 
     sec = div_u64_rem(nsec, NSEC_PER_SEC, &nsec_rem);
     mlxsw_reg_mtutc_pack(mtutc_pl,
                  MLXSW_REG_MTUTC_OPERATION_SET_TIME_IMMEDIATE,
                  0, sec, nsec_rem, 0);
     return mlxsw_reg_write(mlxsw_core, MLXSW_REG(mtutc), mtutc_pl);
 }
 
 static int mlxsw_sp2_ptp_adjfine(struct ptp_clock_info *ptp, long scaled_ppm)
 {
     struct mlxsw_sp_ptp_clock *clock =
         container_of(ptp, struct mlxsw_sp_ptp_clock, ptp_info);
     s32 ppb = scaled_ppm_to_ppb(scaled_ppm);
 
     /* In Spectrum-2 and newer ASICs, the frequency adjustment in MTUTC is
      * reversed, positive values mean to decrease the frequency. Adjust the
      * sign of PPB to this behavior.
      */
     return mlxsw_sp_ptp_phc_adjfreq(clock, -ppb);
 }
 
 static int mlxsw_sp2_ptp_adjtime(struct ptp_clock_info *ptp, s64 delta)
 {
     struct mlxsw_sp_ptp_clock *clock =
         container_of(ptp, struct mlxsw_sp_ptp_clock, ptp_info);
     struct mlxsw_core *mlxsw_core = clock->core;
     char mtutc_pl[MLXSW_REG_MTUTC_LEN];
 
     /* HW time adjustment range is s16. If out of range, set time instead. */
     if (delta < S16_MIN || delta > S16_MAX) {
         u64 nsec;
 
         nsec = mlxsw_sp2_ptp_read_utc(clock, NULL);
         nsec += delta;
 
         return mlxsw_sp2_ptp_phc_settime(clock, nsec);
     }
 
     mlxsw_reg_mtutc_pack(mtutc_pl,
                  MLXSW_REG_MTUTC_OPERATION_ADJUST_TIME,
                  0, 0, 0, delta);
     return mlxsw_reg_write(mlxsw_core, MLXSW_REG(mtutc), mtutc_pl);
 }
 
 static int mlxsw_sp2_ptp_gettimex(struct ptp_clock_info *ptp,
                   struct timespec64 *ts,
                   struct ptp_system_timestamp *sts)
 {
     struct mlxsw_sp_ptp_clock *clock =
         container_of(ptp, struct mlxsw_sp_ptp_clock, ptp_info);
     u64 nsec;
 
     nsec = mlxsw_sp2_ptp_read_utc(clock, sts);
     *ts = ns_to_timespec64(nsec);
 
     return 0;
 }
 
 static int mlxsw_sp2_ptp_settime(struct ptp_clock_info *ptp,
                  const struct timespec64 *ts)
 {
     struct mlxsw_sp_ptp_clock *clock =
         container_of(ptp, struct mlxsw_sp_ptp_clock, ptp_info);
     u64 nsec = timespec64_to_ns(ts);
 
     return mlxsw_sp2_ptp_phc_settime(clock, nsec);
 }
 
 static const struct ptp_clock_info mlxsw_sp2_ptp_clock_info = {
     .owner      = THIS_MODULE,
     .name       = "mlxsw_sp_clock",
     .max_adj    = MLXSW_REG_MTUTC_MAX_FREQ_ADJ,
     .adjfine    = mlxsw_sp2_ptp_adjfine,
     .adjtime    = mlxsw_sp2_ptp_adjtime,
     .gettimex64 = mlxsw_sp2_ptp_gettimex,
     .settime64  = mlxsw_sp2_ptp_settime,
 };
 
 struct mlxsw_sp_ptp_clock *
 mlxsw_sp2_ptp_clock_init(struct mlxsw_sp *mlxsw_sp, struct device *dev)
 {
     struct mlxsw_sp_ptp_clock *clock;
     int err;
 
     clock = kzalloc(sizeof(*clock), GFP_KERNEL);
     if (!clock)
         return ERR_PTR(-ENOMEM);
 
     clock->core = mlxsw_sp->core;
 
     clock->ptp_info = mlxsw_sp2_ptp_clock_info;
 
     err = mlxsw_sp2_ptp_phc_settime(clock, 0);
     if (err) {
         dev_err(dev, "setting UTC time failed %d\n", err);
         goto err_ptp_phc_settime;
     }
 
     clock->ptp = ptp_clock_register(&clock->ptp_info, dev);
     if (IS_ERR(clock->ptp)) {
         err = PTR_ERR(clock->ptp);
         dev_err(dev, "ptp_clock_register failed %d\n", err);
         goto err_ptp_clock_register;
     }
 
     return clock;
 
 err_ptp_clock_register:
 err_ptp_phc_settime:
     kfree(clock);
     return ERR_PTR(err);
 }
 
 void mlxsw_sp2_ptp_clock_fini(struct mlxsw_sp_ptp_clock *clock)
 {
     ptp_clock_unregister(clock->ptp);
     kfree(clock);
 }
 
 static int mlxsw_sp_ptp_parse(struct sk_buff *skb,
                   u8 *p_domain_number,
                   u8 *p_message_type,
                   u16 *p_sequence_id)
 {
     unsigned int ptp_class;
     struct ptp_header *hdr;
 
     ptp_class = ptp_classify_raw(skb);
 
     switch (ptp_class & PTP_CLASS_VMASK) {
     case PTP_CLASS_V1:
     case PTP_CLASS_V2:
         break;
     default:
         return -ERANGE;
     }
 
     hdr = ptp_parse_header(skb, ptp_class);
     if (!hdr)
         return -EINVAL;
 
     *p_message_type  = ptp_get_msgtype(hdr, ptp_class);
     *p_domain_number = hdr->domain_number;
     *p_sequence_id   = be16_to_cpu(hdr->sequence_id);
 
     return 0;
 }
 
 /* Returns NULL on successful insertion, a pointer on conflict, or an ERR_PTR on
  * error.
  */
 static int
 mlxsw_sp1_ptp_unmatched_save(struct mlxsw_sp *mlxsw_sp,
                  struct mlxsw_sp1_ptp_key key,
                  struct sk_buff *skb,
                  u64 timestamp)
 {
     int cycles = MLXSW_SP1_PTP_HT_GC_TIMEOUT / MLXSW_SP1_PTP_HT_GC_INTERVAL;
     struct mlxsw_sp1_ptp_state *ptp_state = mlxsw_sp1_ptp_state(mlxsw_sp);
     struct mlxsw_sp1_ptp_unmatched *unmatched;
     int err;
 
     unmatched = kzalloc(sizeof(*unmatched), GFP_ATOMIC);
     if (!unmatched)
         return -ENOMEM;
 
     unmatched->key = key;
     unmatched->skb = skb;
     unmatched->timestamp = timestamp;
     unmatched->gc_cycle = ptp_state->gc_cycle + cycles;
 
     err = rhltable_insert(&ptp_state->unmatched_ht, &unmatched->ht_node,
                   mlxsw_sp1_ptp_unmatched_ht_params);
     if (err)
         kfree(unmatched);
 
     return err;
 }
 
 static struct mlxsw_sp1_ptp_unmatched *
 mlxsw_sp1_ptp_unmatched_lookup(struct mlxsw_sp *mlxsw_sp,
                    struct mlxsw_sp1_ptp_key key, int *p_length)
 {
     struct mlxsw_sp1_ptp_state *ptp_state = mlxsw_sp1_ptp_state(mlxsw_sp);
     struct mlxsw_sp1_ptp_unmatched *unmatched, *last = NULL;
     struct rhlist_head *tmp, *list;
     int length = 0;
 
     list = rhltable_lookup(&ptp_state->unmatched_ht, &key,
                    mlxsw_sp1_ptp_unmatched_ht_params);
     rhl_for_each_entry_rcu(unmatched, tmp, list, ht_node) {
         last = unmatched;
         length++;
     }
 
     *p_length = length;
     return last;
 }
 
 static int
 mlxsw_sp1_ptp_unmatched_remove(struct mlxsw_sp *mlxsw_sp,
                    struct mlxsw_sp1_ptp_unmatched *unmatched)
 {
     struct mlxsw_sp1_ptp_state *ptp_state = mlxsw_sp1_ptp_state(mlxsw_sp);
 
     return rhltable_remove(&ptp_state->unmatched_ht,
                    &unmatched->ht_node,
                    mlxsw_sp1_ptp_unmatched_ht_params);
 }
 
 /* This function is called in the following scenarios:
  *
  * 1) When a packet is matched with its timestamp.
  * 2) In several situation when it is necessary to immediately pass on
  *    an SKB without a timestamp.
  * 3) From GC indirectly through mlxsw_sp1_ptp_unmatched_finish().
  *    This case is similar to 2) above.
  */
 static void mlxsw_sp1_ptp_packet_finish(struct mlxsw_sp *mlxsw_sp,
                     struct sk_buff *skb, u16 local_port,
                     bool ingress,
                     struct skb_shared_hwtstamps *hwtstamps)
 {
     struct mlxsw_sp_port *mlxsw_sp_port;
 
     /* Between capturing the packet and finishing it, there is a window of
      * opportunity for the originating port to go away (e.g. due to a
      * split). Also make sure the SKB device reference is still valid.
      */
     mlxsw_sp_port = mlxsw_sp->ports[local_port];
     if (!(mlxsw_sp_port && (!skb->dev || skb->dev == mlxsw_sp_port->dev))) {
         dev_kfree_skb_any(skb);
         return;
     }
 
     if (ingress) {
         if (hwtstamps)
             *skb_hwtstamps(skb) = *hwtstamps;
         mlxsw_sp_rx_listener_no_mark_func(skb, local_port, mlxsw_sp);
     } else {
         /* skb_tstamp_tx() allows hwtstamps to be NULL. */
         skb_tstamp_tx(skb, hwtstamps);
         dev_kfree_skb_any(skb);
     }
 }
 
 static void mlxsw_sp1_packet_timestamp(struct mlxsw_sp *mlxsw_sp,
                        struct mlxsw_sp1_ptp_key key,
                        struct sk_buff *skb,
                        u64 timestamp)
 {
     struct mlxsw_sp_ptp_clock *clock_common = mlxsw_sp->clock;
     struct mlxsw_sp1_ptp_clock *clock =
         container_of(clock_common, struct mlxsw_sp1_ptp_clock, common);
 
     struct skb_shared_hwtstamps hwtstamps;
     u64 nsec;
 
     spin_lock_bh(&clock->lock);
     nsec = timecounter_cyc2time(&clock->tc, timestamp);
     spin_unlock_bh(&clock->lock);
 
     hwtstamps.hwtstamp = ns_to_ktime(nsec);
     mlxsw_sp1_ptp_packet_finish(mlxsw_sp, skb,
                     key.local_port, key.ingress, &hwtstamps);
 }
 
 static void
 mlxsw_sp1_ptp_unmatched_finish(struct mlxsw_sp *mlxsw_sp,
                    struct mlxsw_sp1_ptp_unmatched *unmatched)
 {
     if (unmatched->skb && unmatched->timestamp)
         mlxsw_sp1_packet_timestamp(mlxsw_sp, unmatched->key,
                        unmatched->skb,
                        unmatched->timestamp);
     else if (unmatched->skb)
         mlxsw_sp1_ptp_packet_finish(mlxsw_sp, unmatched->skb,
                         unmatched->key.local_port,
                         unmatched->key.ingress, NULL);
     kfree_rcu(unmatched, rcu);
 }
 
 static void mlxsw_sp1_ptp_unmatched_free_fn(void *ptr, void *arg)
 {
     struct mlxsw_sp1_ptp_unmatched *unmatched = ptr;
 
     /* This is invoked at a point where the ports are gone already. Nothing
      * to do with whatever is left in the HT but to free it.
      */
     if (unmatched->skb)
         dev_kfree_skb_any(unmatched->skb);
     kfree_rcu(unmatched, rcu);
 }
 
 static void mlxsw_sp1_ptp_got_piece(struct mlxsw_sp *mlxsw_sp,
                     struct mlxsw_sp1_ptp_key key,
                     struct sk_buff *skb, u64 timestamp)
 {
     struct mlxsw_sp1_ptp_state *ptp_state = mlxsw_sp1_ptp_state(mlxsw_sp);
     struct mlxsw_sp1_ptp_unmatched *unmatched;
     int length;
     int err;
 
     rcu_read_lock();
 
     spin_lock(&ptp_state->unmatched_lock);
 
     unmatched = mlxsw_sp1_ptp_unmatched_lookup(mlxsw_sp, key, &length);
     if (skb && unmatched && unmatched->timestamp) {
         unmatched->skb = skb;
     } else if (timestamp && unmatched && unmatched->skb) {
         unmatched->timestamp = timestamp;
     } else {
         /* Either there is no entry to match, or one that is there is
          * incompatible.
          */
         if (length < 100)
             err = mlxsw_sp1_ptp_unmatched_save(mlxsw_sp, key,
                                skb, timestamp);
         else
             err = -E2BIG;
         if (err && skb)
             mlxsw_sp1_ptp_packet_finish(mlxsw_sp, skb,
                             key.local_port,
                             key.ingress, NULL);
         unmatched = NULL;
     }
 
     if (unmatched) {
         err = mlxsw_sp1_ptp_unmatched_remove(mlxsw_sp, unmatched);
         WARN_ON_ONCE(err);
     }
 
     spin_unlock(&ptp_state->unmatched_lock);
 
     if (unmatched)
         mlxsw_sp1_ptp_unmatched_finish(mlxsw_sp, unmatched);
 
     rcu_read_unlock();
 }
 
 static void mlxsw_sp1_ptp_got_packet(struct mlxsw_sp *mlxsw_sp,
                      struct sk_buff *skb, u16 local_port,
                      bool ingress)
 {
     struct mlxsw_sp_port *mlxsw_sp_port;
     struct mlxsw_sp1_ptp_key key;
     u8 types;
     int err;
 
     mlxsw_sp_port = mlxsw_sp->ports[local_port];
     if (!mlxsw_sp_port)
         goto immediate;
 
     types = ingress ? mlxsw_sp_port->ptp.ing_types :
               mlxsw_sp_port->ptp.egr_types;
     if (!types)
         goto immediate;
 
     memset(&key, 0, sizeof(key));
     key.local_port = local_port;
     key.ingress = ingress;
 
     err = mlxsw_sp_ptp_parse(skb, &key.domain_number, &key.message_type,
                  &key.sequence_id);
     if (err)
         goto immediate;
 
     /* For packets whose timestamping was not enabled on this port, don't
      * bother trying to match the timestamp.
      */
     if (!((1 << key.message_type) & types))
         goto immediate;
 
     mlxsw_sp1_ptp_got_piece(mlxsw_sp, key, skb, 0);
     return;
 
 immediate:
     mlxsw_sp1_ptp_packet_finish(mlxsw_sp, skb, local_port, ingress, NULL);
 }
 
 void mlxsw_sp1_ptp_got_timestamp(struct mlxsw_sp *mlxsw_sp, bool ingress,
                  u16 local_port, u8 message_type,
                  u8 domain_number, u16 sequence_id,
                  u64 timestamp)
 {
     struct mlxsw_sp_port *mlxsw_sp_port;
     struct mlxsw_sp1_ptp_key key;
     u8 types;
 
     if (WARN_ON_ONCE(!mlxsw_sp_local_port_is_valid(mlxsw_sp, local_port)))
         return;
     mlxsw_sp_port = mlxsw_sp->ports[local_port];
     if (!mlxsw_sp_port)
         return;
 
     types = ingress ? mlxsw_sp_port->ptp.ing_types :
               mlxsw_sp_port->ptp.egr_types;
 
     /* For message types whose timestamping was not enabled on this port,
      * don't bother with the timestamp.
      */
     if (!((1 << message_type) & types))
         return;
 
     memset(&key, 0, sizeof(key));
     key.local_port = local_port;
     key.domain_number = domain_number;
     key.message_type = message_type;
     key.sequence_id = sequence_id;
     key.ingress = ingress;
 
     mlxsw_sp1_ptp_got_piece(mlxsw_sp, key, NULL, timestamp);
 }
 
 void mlxsw_sp1_ptp_receive(struct mlxsw_sp *mlxsw_sp, struct sk_buff *skb,
                u16 local_port)
 {
     skb_reset_mac_header(skb);
     mlxsw_sp1_ptp_got_packet(mlxsw_sp, skb, local_port, true);
 }
 
 void mlxsw_sp1_ptp_transmitted(struct mlxsw_sp *mlxsw_sp,
                    struct sk_buff *skb, u16 local_port)
 {
     mlxsw_sp1_ptp_got_packet(mlxsw_sp, skb, local_port, false);
 }
 
 static void
 mlxsw_sp1_ptp_ht_gc_collect(struct mlxsw_sp1_ptp_state *ptp_state,
                 struct mlxsw_sp1_ptp_unmatched *unmatched)
 {
     struct mlxsw_sp *mlxsw_sp = ptp_state->common.mlxsw_sp;
     struct mlxsw_sp_ptp_port_dir_stats *stats;
     struct mlxsw_sp_port *mlxsw_sp_port;
     int err;
 
     /* If an unmatched entry has an SKB, it has to be handed over to the
      * networking stack. This is usually done from a trap handler, which is
      * invoked in a softirq context. Here we are going to do it in process
      * context. If that were to be interrupted by a softirq, it could cause
      * a deadlock when an attempt is made to take an already-taken lock
      * somewhere along the sending path. Disable softirqs to prevent this.
      */
     local_bh_disable();
 
     spin_lock(&ptp_state->unmatched_lock);
     err = rhltable_remove(&ptp_state->unmatched_ht, &unmatched->ht_node,
                   mlxsw_sp1_ptp_unmatched_ht_params);
     spin_unlock(&ptp_state->unmatched_lock);
 
     if (err)
         /* The packet was matched with timestamp during the walk. */
         goto out;
 
     mlxsw_sp_port = mlxsw_sp->ports[unmatched->key.local_port];
     if (mlxsw_sp_port) {
         stats = unmatched->key.ingress ?
             &mlxsw_sp_port->ptp.stats.rx_gcd :
             &mlxsw_sp_port->ptp.stats.tx_gcd;
         if (unmatched->skb)
             stats->packets++;
         else
             stats->timestamps++;
     }
 
     /* mlxsw_sp1_ptp_unmatched_finish() invokes netif_receive_skb(). While
      * the comment at that function states that it can only be called in
      * soft IRQ context, this pattern of local_bh_disable() +
      * netif_receive_skb(), in process context, is seen elsewhere in the
      * kernel, notably in pktgen.
      */
     mlxsw_sp1_ptp_unmatched_finish(mlxsw_sp, unmatched);
 
 out:
     local_bh_enable();
 }
 
 static void mlxsw_sp1_ptp_ht_gc(struct work_struct *work)
 {
     struct delayed_work *dwork = to_delayed_work(work);
     struct mlxsw_sp1_ptp_unmatched *unmatched;
     struct mlxsw_sp1_ptp_state *ptp_state;
     struct rhashtable_iter iter;
     u32 gc_cycle;
     void *obj;
 
     ptp_state = container_of(dwork, struct mlxsw_sp1_ptp_state, ht_gc_dw);
     gc_cycle = ptp_state->gc_cycle++;
 
     rhltable_walk_enter(&ptp_state->unmatched_ht, &iter);
     rhashtable_walk_start(&iter);
     while ((obj = rhashtable_walk_next(&iter))) {
         if (IS_ERR(obj))
             continue;
 
         unmatched = obj;
         if (unmatched->gc_cycle <= gc_cycle)
             mlxsw_sp1_ptp_ht_gc_collect(ptp_state, unmatched);
     }
     rhashtable_walk_stop(&iter);
     rhashtable_walk_exit(&iter);
 
     mlxsw_core_schedule_dw(&ptp_state->ht_gc_dw,
                    MLXSW_SP1_PTP_HT_GC_INTERVAL);
 }
 
 static int mlxsw_sp_ptp_mtptpt_set(struct mlxsw_sp *mlxsw_sp,
                    enum mlxsw_reg_mtptpt_trap_id trap_id,
                    u16 message_type)
 {
     char mtptpt_pl[MLXSW_REG_MTPTPT_LEN];
 
     mlxsw_reg_mtptpt_pack(mtptpt_pl, trap_id, message_type);
     return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(mtptpt), mtptpt_pl);
 }
 
 static int mlxsw_sp1_ptp_set_fifo_clr_on_trap(struct mlxsw_sp *mlxsw_sp,
                           bool clr)
 {
     char mogcr_pl[MLXSW_REG_MOGCR_LEN] = {0};
     int err;
 
     err = mlxsw_reg_query(mlxsw_sp->core, MLXSW_REG(mogcr), mogcr_pl);
     if (err)
         return err;
 
     mlxsw_reg_mogcr_ptp_iftc_set(mogcr_pl, clr);
     mlxsw_reg_mogcr_ptp_eftc_set(mogcr_pl, clr);
     return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(mogcr), mogcr_pl);
 }
 
 static int mlxsw_sp1_ptp_mtpppc_set(struct mlxsw_sp *mlxsw_sp,
                     u16 ing_types, u16 egr_types)
 {
     char mtpppc_pl[MLXSW_REG_MTPPPC_LEN];
 
     mlxsw_reg_mtpppc_pack(mtpppc_pl, ing_types, egr_types);
     return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(mtpppc), mtpppc_pl);
 }
 
 struct mlxsw_sp1_ptp_shaper_params {
     u32 ethtool_speed;
     enum mlxsw_reg_qpsc_port_speed port_speed;
     u8 shaper_time_exp;
     u8 shaper_time_mantissa;
     u8 shaper_inc;
     u8 shaper_bs;
     u8 port_to_shaper_credits;
     int ing_timestamp_inc;
     int egr_timestamp_inc;
 };
 
 static const struct mlxsw_sp1_ptp_shaper_params
 mlxsw_sp1_ptp_shaper_params[] = {
     {
         .ethtool_speed      = SPEED_100,
         .port_speed     = MLXSW_REG_QPSC_PORT_SPEED_100M,
         .shaper_time_exp    = 4,
         .shaper_time_mantissa   = 12,
         .shaper_inc     = 9,
         .shaper_bs      = 1,
         .port_to_shaper_credits = 1,
         .ing_timestamp_inc  = -313,
         .egr_timestamp_inc  = 313,
     },
     {
         .ethtool_speed      = SPEED_1000,
         .port_speed     = MLXSW_REG_QPSC_PORT_SPEED_1G,
         .shaper_time_exp    = 0,
         .shaper_time_mantissa   = 12,
         .shaper_inc     = 6,
         .shaper_bs      = 0,
         .port_to_shaper_credits = 1,
         .ing_timestamp_inc  = -35,
         .egr_timestamp_inc  = 35,
     },
     {
         .ethtool_speed      = SPEED_10000,
         .port_speed     = MLXSW_REG_QPSC_PORT_SPEED_10G,
         .shaper_time_exp    = 0,
         .shaper_time_mantissa   = 2,
         .shaper_inc     = 14,
         .shaper_bs      = 1,
         .port_to_shaper_credits = 1,
         .ing_timestamp_inc  = -11,
         .egr_timestamp_inc  = 11,
     },
     {
         .ethtool_speed      = SPEED_25000,
         .port_speed     = MLXSW_REG_QPSC_PORT_SPEED_25G,
         .shaper_time_exp    = 0,
         .shaper_time_mantissa   = 0,
         .shaper_inc     = 11,
         .shaper_bs      = 1,
         .port_to_shaper_credits = 1,
         .ing_timestamp_inc  = -14,
         .egr_timestamp_inc  = 14,
     },
 };
 
 #define MLXSW_SP1_PTP_SHAPER_PARAMS_LEN ARRAY_SIZE(mlxsw_sp1_ptp_shaper_params)
 
 static int mlxsw_sp1_ptp_shaper_params_set(struct mlxsw_sp *mlxsw_sp)
 {
     const struct mlxsw_sp1_ptp_shaper_params *params;
     char qpsc_pl[MLXSW_REG_QPSC_LEN];
     int i, err;
 
     for (i = 0; i < MLXSW_SP1_PTP_SHAPER_PARAMS_LEN; i++) {
         params = &mlxsw_sp1_ptp_shaper_params[i];
         mlxsw_reg_qpsc_pack(qpsc_pl, params->port_speed,
                     params->shaper_time_exp,
                     params->shaper_time_mantissa,
                     params->shaper_inc, params->shaper_bs,
                     params->port_to_shaper_credits,
                     params->ing_timestamp_inc,
                     params->egr_timestamp_inc);
         err = mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(qpsc), qpsc_pl);
         if (err)
             return err;
     }
 
     return 0;
 }
 
 static int mlxsw_sp_ptp_traps_set(struct mlxsw_sp *mlxsw_sp)
 {
     u16 event_message_type;
     int err;
 
     /* Deliver these message types as PTP0. */
     event_message_type = BIT(PTP_MSGTYPE_SYNC) |
                  BIT(PTP_MSGTYPE_DELAY_REQ) |
                  BIT(PTP_MSGTYPE_PDELAY_REQ) |
                  BIT(PTP_MSGTYPE_PDELAY_RESP);
 
     err = mlxsw_sp_ptp_mtptpt_set(mlxsw_sp, MLXSW_REG_MTPTPT_TRAP_ID_PTP0,
                       event_message_type);
     if (err)
         return err;
 
     /* Everything else is PTP1. */
     err = mlxsw_sp_ptp_mtptpt_set(mlxsw_sp, MLXSW_REG_MTPTPT_TRAP_ID_PTP1,
                       ~event_message_type);
     if (err)
         goto err_mtptpt1_set;
 
     return 0;
 
 err_mtptpt1_set:
     mlxsw_sp_ptp_mtptpt_set(mlxsw_sp, MLXSW_REG_MTPTPT_TRAP_ID_PTP0, 0);
     return err;
 }
 
 static void mlxsw_sp_ptp_traps_unset(struct mlxsw_sp *mlxsw_sp)
 {
     mlxsw_sp_ptp_mtptpt_set(mlxsw_sp, MLXSW_REG_MTPTPT_TRAP_ID_PTP1, 0);
     mlxsw_sp_ptp_mtptpt_set(mlxsw_sp, MLXSW_REG_MTPTPT_TRAP_ID_PTP0, 0);
 }
 
 struct mlxsw_sp_ptp_state *mlxsw_sp1_ptp_init(struct mlxsw_sp *mlxsw_sp)
 {
     struct mlxsw_sp1_ptp_state *ptp_state;
     int err;
 
     err = mlxsw_sp1_ptp_shaper_params_set(mlxsw_sp);
     if (err)
         return ERR_PTR(err);
 
     ptp_state = kzalloc(sizeof(*ptp_state), GFP_KERNEL);
     if (!ptp_state)
         return ERR_PTR(-ENOMEM);
     ptp_state->common.mlxsw_sp = mlxsw_sp;
 
     spin_lock_init(&ptp_state->unmatched_lock);
 
     err = rhltable_init(&ptp_state->unmatched_ht,
                 &mlxsw_sp1_ptp_unmatched_ht_params);
     if (err)
         goto err_hashtable_init;
 
     err = mlxsw_sp_ptp_traps_set(mlxsw_sp);
     if (err)
         goto err_ptp_traps_set;
 
     err = mlxsw_sp1_ptp_set_fifo_clr_on_trap(mlxsw_sp, true);
     if (err)
         goto err_fifo_clr;
 
     INIT_DELAYED_WORK(&ptp_state->ht_gc_dw, mlxsw_sp1_ptp_ht_gc);
     mlxsw_core_schedule_dw(&ptp_state->ht_gc_dw,
                    MLXSW_SP1_PTP_HT_GC_INTERVAL);
     return &ptp_state->common;
 
 err_fifo_clr:
     mlxsw_sp_ptp_traps_unset(mlxsw_sp);
 err_ptp_traps_set:
     rhltable_destroy(&ptp_state->unmatched_ht);
 err_hashtable_init:
     kfree(ptp_state);
     return ERR_PTR(err);
 }
 
 void mlxsw_sp1_ptp_fini(struct mlxsw_sp_ptp_state *ptp_state_common)
 {
     struct mlxsw_sp *mlxsw_sp = ptp_state_common->mlxsw_sp;
     struct mlxsw_sp1_ptp_state *ptp_state;
 
     ptp_state = mlxsw_sp1_ptp_state(mlxsw_sp);
 
     cancel_delayed_work_sync(&ptp_state->ht_gc_dw);
     mlxsw_sp1_ptp_mtpppc_set(mlxsw_sp, 0, 0);
     mlxsw_sp1_ptp_set_fifo_clr_on_trap(mlxsw_sp, false);
     mlxsw_sp_ptp_traps_unset(mlxsw_sp);
     rhltable_free_and_destroy(&ptp_state->unmatched_ht,
                   &mlxsw_sp1_ptp_unmatched_free_fn, NULL);
     kfree(ptp_state);
 }
 
 int mlxsw_sp1_ptp_hwtstamp_get(struct mlxsw_sp_port *mlxsw_sp_port,
                    struct hwtstamp_config *config)
 {
     *config = mlxsw_sp_port->ptp.hwtstamp_config;
     return 0;
 }
 
 static int
 mlxsw_sp1_ptp_get_message_types(const struct hwtstamp_config *config,
                 u16 *p_ing_types, u16 *p_egr_types,
                 enum hwtstamp_rx_filters *p_rx_filter)
 {
     enum hwtstamp_rx_filters rx_filter = config->rx_filter;
     enum hwtstamp_tx_types tx_type = config->tx_type;
     u16 ing_types = 0x00;
     u16 egr_types = 0x00;
 
     switch (tx_type) {
     case HWTSTAMP_TX_OFF:
         egr_types = 0x00;
         break;
     case HWTSTAMP_TX_ON:
         egr_types = 0xff;
         break;
     case HWTSTAMP_TX_ONESTEP_SYNC:
     case HWTSTAMP_TX_ONESTEP_P2P:
         return -ERANGE;
     default:
         return -EINVAL;
     }
 
     switch (rx_filter) {
     case HWTSTAMP_FILTER_NONE:
         ing_types = 0x00;
         break;
     case HWTSTAMP_FILTER_PTP_V1_L4_SYNC:
     case HWTSTAMP_FILTER_PTP_V2_L4_SYNC:
     case HWTSTAMP_FILTER_PTP_V2_L2_SYNC:
     case HWTSTAMP_FILTER_PTP_V2_SYNC:
         ing_types = 0x01;
         break;
     case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ:
     case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ:
     case HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ:
     case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ:
         ing_types = 0x02;
         break;
     case HWTSTAMP_FILTER_PTP_V1_L4_EVENT:
     case HWTSTAMP_FILTER_PTP_V2_L4_EVENT:
     case HWTSTAMP_FILTER_PTP_V2_L2_EVENT:
     case HWTSTAMP_FILTER_PTP_V2_EVENT:
         ing_types = 0x0f;
         break;
     case HWTSTAMP_FILTER_ALL:
         ing_types = 0xff;
         break;
     case HWTSTAMP_FILTER_SOME:
     case HWTSTAMP_FILTER_NTP_ALL:
         return -ERANGE;
     default:
         return -EINVAL;
     }
 
     *p_ing_types = ing_types;
     *p_egr_types = egr_types;
     *p_rx_filter = rx_filter;
     return 0;
 }
 
 static int mlxsw_sp1_ptp_mtpppc_update(struct mlxsw_sp_port *mlxsw_sp_port,
                        u16 ing_types, u16 egr_types)
 {
     struct mlxsw_sp *mlxsw_sp = mlxsw_sp_port->mlxsw_sp;
     struct mlxsw_sp_port *tmp;
     u16 orig_ing_types = 0;
     u16 orig_egr_types = 0;
     int err;
     int i;
 
     /* MTPPPC configures timestamping globally, not per port. Find the
      * configuration that contains all configured timestamping requests.
      */
     for (i = 1; i < mlxsw_core_max_ports(mlxsw_sp->core); i++) {
         tmp = mlxsw_sp->ports[i];
         if (tmp) {
             orig_ing_types |= tmp->ptp.ing_types;
             orig_egr_types |= tmp->ptp.egr_types;
         }
         if (tmp && tmp != mlxsw_sp_port) {
             ing_types |= tmp->ptp.ing_types;
             egr_types |= tmp->ptp.egr_types;
         }
     }
 
     if ((ing_types || egr_types) && !(orig_ing_types || orig_egr_types)) {
         err = mlxsw_sp_parsing_depth_inc(mlxsw_sp);
         if (err) {
             netdev_err(mlxsw_sp_port->dev, "Failed to increase parsing depth");
             return err;
         }
     }
     if (!(ing_types || egr_types) && (orig_ing_types || orig_egr_types))
         mlxsw_sp_parsing_depth_dec(mlxsw_sp);
 
     return mlxsw_sp1_ptp_mtpppc_set(mlxsw_sp_port->mlxsw_sp,
                        ing_types, egr_types);
 }
 
 static bool mlxsw_sp1_ptp_hwtstamp_enabled(struct mlxsw_sp_port *mlxsw_sp_port)
 {
     return mlxsw_sp_port->ptp.ing_types || mlxsw_sp_port->ptp.egr_types;
 }
 
 static int
 mlxsw_sp1_ptp_port_shaper_set(struct mlxsw_sp_port *mlxsw_sp_port, bool enable)
 {
     struct mlxsw_sp *mlxsw_sp = mlxsw_sp_port->mlxsw_sp;
     char qeec_pl[MLXSW_REG_QEEC_LEN];
 
     mlxsw_reg_qeec_ptps_pack(qeec_pl, mlxsw_sp_port->local_port, enable);
     return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(qeec), qeec_pl);
 }
 
 static int mlxsw_sp1_ptp_port_shaper_check(struct mlxsw_sp_port *mlxsw_sp_port)
 {
     bool ptps = false;
     int err, i;
     u32 speed;
 
     if (!mlxsw_sp1_ptp_hwtstamp_enabled(mlxsw_sp_port))
         return mlxsw_sp1_ptp_port_shaper_set(mlxsw_sp_port, false);
 
     err = mlxsw_sp_port_speed_get(mlxsw_sp_port, &speed);
     if (err)
         return err;
 
     for (i = 0; i < MLXSW_SP1_PTP_SHAPER_PARAMS_LEN; i++) {
         if (mlxsw_sp1_ptp_shaper_params[i].ethtool_speed == speed) {
             ptps = true;
             break;
         }
     }
 
     return mlxsw_sp1_ptp_port_shaper_set(mlxsw_sp_port, ptps);
 }
 
 void mlxsw_sp1_ptp_shaper_work(struct work_struct *work)
 {
     struct delayed_work *dwork = to_delayed_work(work);
     struct mlxsw_sp_port *mlxsw_sp_port;
     int err;
 
     mlxsw_sp_port = container_of(dwork, struct mlxsw_sp_port,
                      ptp.shaper_dw);
 
     if (!mlxsw_sp1_ptp_hwtstamp_enabled(mlxsw_sp_port))
         return;
 
     err = mlxsw_sp1_ptp_port_shaper_check(mlxsw_sp_port);
     if (err)
         netdev_err(mlxsw_sp_port->dev, "Failed to set up PTP shaper\n");
 }
 
 int mlxsw_sp1_ptp_hwtstamp_set(struct mlxsw_sp_port *mlxsw_sp_port,
                    struct hwtstamp_config *config)
 {
     enum hwtstamp_rx_filters rx_filter;
     u16 ing_types;
     u16 egr_types;
     int err;
 
     err = mlxsw_sp1_ptp_get_message_types(config, &ing_types, &egr_types,
                           &rx_filter);
     if (err)
         return err;
 
     err = mlxsw_sp1_ptp_mtpppc_update(mlxsw_sp_port, ing_types, egr_types);
     if (err)
         return err;
 
     mlxsw_sp_port->ptp.hwtstamp_config = *config;
     mlxsw_sp_port->ptp.ing_types = ing_types;
     mlxsw_sp_port->ptp.egr_types = egr_types;
 
     err = mlxsw_sp1_ptp_port_shaper_check(mlxsw_sp_port);
     if (err)
         return err;
 
     /* Notify the ioctl caller what we are actually timestamping. */
     config->rx_filter = rx_filter;
 
     return 0;
 }
 
 int mlxsw_sp1_ptp_get_ts_info(struct mlxsw_sp *mlxsw_sp,
                   struct ethtool_ts_info *info)
 {
     info->phc_index = ptp_clock_index(mlxsw_sp->clock->ptp);
 
     info->so_timestamping = SOF_TIMESTAMPING_TX_HARDWARE |
                 SOF_TIMESTAMPING_RX_HARDWARE |
                 SOF_TIMESTAMPING_RAW_HARDWARE;
 
     info->tx_types = BIT(HWTSTAMP_TX_OFF) |
              BIT(HWTSTAMP_TX_ON);
 
     info->rx_filters = BIT(HWTSTAMP_FILTER_NONE) |
                BIT(HWTSTAMP_FILTER_ALL);
 
     return 0;
 }
 
 struct mlxsw_sp_ptp_port_stat {
     char str[ETH_GSTRING_LEN];
     ptrdiff_t offset;
 };
 
 #define MLXSW_SP_PTP_PORT_STAT(NAME, FIELD)             \
     {                               \
         .str = NAME,                        \
         .offset = offsetof(struct mlxsw_sp_ptp_port_stats,  \
                     FIELD),             \
     }
 
 static const struct mlxsw_sp_ptp_port_stat mlxsw_sp_ptp_port_stats[] = {
     MLXSW_SP_PTP_PORT_STAT("ptp_rx_gcd_packets",    rx_gcd.packets),
     MLXSW_SP_PTP_PORT_STAT("ptp_rx_gcd_timestamps", rx_gcd.timestamps),
     MLXSW_SP_PTP_PORT_STAT("ptp_tx_gcd_packets",    tx_gcd.packets),
     MLXSW_SP_PTP_PORT_STAT("ptp_tx_gcd_timestamps", tx_gcd.timestamps),
 };
 
 #undef MLXSW_SP_PTP_PORT_STAT
 
 #define MLXSW_SP_PTP_PORT_STATS_LEN \
     ARRAY_SIZE(mlxsw_sp_ptp_port_stats)
 
 int mlxsw_sp1_get_stats_count(void)
 {
     return MLXSW_SP_PTP_PORT_STATS_LEN;
 }
 
 void mlxsw_sp1_get_stats_strings(u8 **p)
 {
     int i;
 
     for (i = 0; i < MLXSW_SP_PTP_PORT_STATS_LEN; i++) {
         memcpy(*p, mlxsw_sp_ptp_port_stats[i].str,
                ETH_GSTRING_LEN);
         *p += ETH_GSTRING_LEN;
     }
 }
 
 void mlxsw_sp1_get_stats(struct mlxsw_sp_port *mlxsw_sp_port,
              u64 *data, int data_index)
 {
     void *stats = &mlxsw_sp_port->ptp.stats;
     ptrdiff_t offset;
     int i;
 
     data += data_index;
     for (i = 0; i < MLXSW_SP_PTP_PORT_STATS_LEN; i++) {
         offset = mlxsw_sp_ptp_port_stats[i].offset;
         *data++ = *(u64 *)(stats + offset);
     }
 }
 
 struct mlxsw_sp_ptp_state *mlxsw_sp2_ptp_init(struct mlxsw_sp *mlxsw_sp)
 {
     struct mlxsw_sp2_ptp_state *ptp_state;
     int err;
 
     ptp_state = kzalloc(sizeof(*ptp_state), GFP_KERNEL);
     if (!ptp_state)
         return ERR_PTR(-ENOMEM);
 
     ptp_state->common.mlxsw_sp = mlxsw_sp;
 
     err = mlxsw_sp_ptp_traps_set(mlxsw_sp);
     if (err)
         goto err_ptp_traps_set;
 
     refcount_set(&ptp_state->ptp_port_enabled_ref, 0);
     mutex_init(&ptp_state->lock);
     return &ptp_state->common;
 
 err_ptp_traps_set:
     kfree(ptp_state);
     return ERR_PTR(err);
 }
 
 void mlxsw_sp2_ptp_fini(struct mlxsw_sp_ptp_state *ptp_state_common)
 {
     struct mlxsw_sp *mlxsw_sp = ptp_state_common->mlxsw_sp;
     struct mlxsw_sp2_ptp_state *ptp_state;
 
     ptp_state = mlxsw_sp2_ptp_state(mlxsw_sp);
 
     mutex_destroy(&ptp_state->lock);
     mlxsw_sp_ptp_traps_unset(mlxsw_sp);
     kfree(ptp_state);
 }
 
 static u32 mlxsw_ptp_utc_time_stamp_sec_get(struct mlxsw_core *mlxsw_core,
                         u8 cqe_ts_sec)
 {
     u32 utc_sec = mlxsw_core_read_utc_sec(mlxsw_core);
 
     if (cqe_ts_sec > (utc_sec & 0xff))
         /* Time stamp above the last bits of UTC (UTC & 0xff) means the
          * latter has wrapped after the time stamp was collected.
          */
         utc_sec -= 256;
 
     utc_sec &= ~0xff;
     utc_sec |= cqe_ts_sec;
 
     return utc_sec;
 }
 
 static void mlxsw_sp2_ptp_hwtstamp_fill(struct mlxsw_core *mlxsw_core,
                     const struct mlxsw_skb_cb *cb,
                     struct skb_shared_hwtstamps *hwtstamps)
 {
     u64 ts_sec, ts_nsec, nsec;
 
     WARN_ON_ONCE(!cb->cqe_ts.sec && !cb->cqe_ts.nsec);
 
     /* The time stamp in the CQE is represented by 38 bits, which is a short
      * representation of UTC time. Software should create the full time
      * stamp using the global UTC clock. The seconds have only 8 bits in the
      * CQE, to create the full time stamp, use the current UTC time and fix
      * the seconds according to the relation between UTC seconds and CQE
      * seconds.
      */
     ts_sec = mlxsw_ptp_utc_time_stamp_sec_get(mlxsw_core, cb->cqe_ts.sec);
     ts_nsec = cb->cqe_ts.nsec;
 
     nsec = ts_sec * NSEC_PER_SEC + ts_nsec;
 
     hwtstamps->hwtstamp = ns_to_ktime(nsec);
 }
 
 void mlxsw_sp2_ptp_receive(struct mlxsw_sp *mlxsw_sp, struct sk_buff *skb,
                u16 local_port)
 {
     struct skb_shared_hwtstamps hwtstamps;
 
     mlxsw_sp2_ptp_hwtstamp_fill(mlxsw_sp->core, mlxsw_skb_cb(skb),
                     &hwtstamps);
     *skb_hwtstamps(skb) = hwtstamps;
     mlxsw_sp_rx_listener_no_mark_func(skb, local_port, mlxsw_sp);
 }
 
 void mlxsw_sp2_ptp_transmitted(struct mlxsw_sp *mlxsw_sp,
                    struct sk_buff *skb, u16 local_port)
 {
     struct skb_shared_hwtstamps hwtstamps;
 
     mlxsw_sp2_ptp_hwtstamp_fill(mlxsw_sp->core, mlxsw_skb_cb(skb),
                     &hwtstamps);
     skb_tstamp_tx(skb, &hwtstamps);
     dev_kfree_skb_any(skb);
 }
 
 int mlxsw_sp2_ptp_hwtstamp_get(struct mlxsw_sp_port *mlxsw_sp_port,
                    struct hwtstamp_config *config)
 {
     struct mlxsw_sp2_ptp_state *ptp_state;
 
     ptp_state = mlxsw_sp2_ptp_state(mlxsw_sp_port->mlxsw_sp);
 
     mutex_lock(&ptp_state->lock);
     *config = ptp_state->config;
     mutex_unlock(&ptp_state->lock);
 
     return 0;
 }
 
 static int
 mlxsw_sp2_ptp_get_message_types(const struct hwtstamp_config *config,
                 u16 *p_ing_types, u16 *p_egr_types,
                 enum hwtstamp_rx_filters *p_rx_filter)
 {
     enum hwtstamp_rx_filters rx_filter = config->rx_filter;
     enum hwtstamp_tx_types tx_type = config->tx_type;
     u16 ing_types = 0x00;
     u16 egr_types = 0x00;
 
     *p_rx_filter = rx_filter;
 
     switch (rx_filter) {
     case HWTSTAMP_FILTER_NONE:
         ing_types = 0x00;
         break;
     case HWTSTAMP_FILTER_PTP_V1_L4_SYNC:
     case HWTSTAMP_FILTER_PTP_V2_L4_SYNC:
     case HWTSTAMP_FILTER_PTP_V2_L2_SYNC:
     case HWTSTAMP_FILTER_PTP_V2_SYNC:
     case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ:
     case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ:
     case HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ:
     case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ:
     case HWTSTAMP_FILTER_PTP_V1_L4_EVENT:
     case HWTSTAMP_FILTER_PTP_V2_L4_EVENT:
     case HWTSTAMP_FILTER_PTP_V2_L2_EVENT:
     case HWTSTAMP_FILTER_PTP_V2_EVENT:
         /* In Spectrum-2 and above, all packets get time stamp by
          * default and the driver fill the time stamp only for event
          * packets. Return all event types even if only specific types
          * were required.
          */
         ing_types = 0x0f;
         *p_rx_filter = HWTSTAMP_FILTER_SOME;
         break;
     case HWTSTAMP_FILTER_ALL:
     case HWTSTAMP_FILTER_SOME:
     case HWTSTAMP_FILTER_NTP_ALL:
         return -ERANGE;
     default:
         return -EINVAL;
     }
 
     switch (tx_type) {
     case HWTSTAMP_TX_OFF:
         egr_types = 0x00;
         break;
     case HWTSTAMP_TX_ON:
         egr_types = 0x0f;
         break;
     case HWTSTAMP_TX_ONESTEP_SYNC:
     case HWTSTAMP_TX_ONESTEP_P2P:
         return -ERANGE;
     default:
         return -EINVAL;
     }
 
     if ((ing_types && !egr_types) || (!ing_types && egr_types))
         return -EINVAL;
 
     *p_ing_types = ing_types;
     *p_egr_types = egr_types;
     return 0;
 }
 
 static int mlxsw_sp2_ptp_mtpcpc_set(struct mlxsw_sp *mlxsw_sp, bool ptp_trap_en,
                     u16 ing_types, u16 egr_types)
 {
     char mtpcpc_pl[MLXSW_REG_MTPCPC_LEN];
 
     mlxsw_reg_mtpcpc_pack(mtpcpc_pl, false, 0, ptp_trap_en, ing_types,
                   egr_types);
     return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(mtpcpc), mtpcpc_pl);
 }
 
 static int mlxsw_sp2_ptp_enable(struct mlxsw_sp *mlxsw_sp, u16 ing_types,
                 u16 egr_types,
                 struct hwtstamp_config new_config)
 {
     struct mlxsw_sp2_ptp_state *ptp_state = mlxsw_sp2_ptp_state(mlxsw_sp);
     int err;
 
     err = mlxsw_sp2_ptp_mtpcpc_set(mlxsw_sp, true, ing_types, egr_types);
     if (err)
         return err;
 
     ptp_state->config = new_config;
     return 0;
 }
 
 static int mlxsw_sp2_ptp_disable(struct mlxsw_sp *mlxsw_sp,
                  struct hwtstamp_config new_config)
 {
     struct mlxsw_sp2_ptp_state *ptp_state = mlxsw_sp2_ptp_state(mlxsw_sp);
     int err;
 
     err = mlxsw_sp2_ptp_mtpcpc_set(mlxsw_sp, false, 0, 0);
     if (err)
         return err;
 
     ptp_state->config = new_config;
     return 0;
 }
 
 static int mlxsw_sp2_ptp_configure_port(struct mlxsw_sp_port *mlxsw_sp_port,
                     u16 ing_types, u16 egr_types,
                     struct hwtstamp_config new_config)
 {
     struct mlxsw_sp2_ptp_state *ptp_state;
     int err;
 
     ptp_state = mlxsw_sp2_ptp_state(mlxsw_sp_port->mlxsw_sp);
 
     if (refcount_inc_not_zero(&ptp_state->ptp_port_enabled_ref))
         return 0;
 
     err = mlxsw_sp2_ptp_enable(mlxsw_sp_port->mlxsw_sp, ing_types,
                    egr_types, new_config);
     if (err)
         return err;
 
     refcount_set(&ptp_state->ptp_port_enabled_ref, 1);
 
     return 0;
 }
 
 static int mlxsw_sp2_ptp_deconfigure_port(struct mlxsw_sp_port *mlxsw_sp_port,
                       struct hwtstamp_config new_config)
 {
     struct mlxsw_sp2_ptp_state *ptp_state;
     int err;
 
     ptp_state = mlxsw_sp2_ptp_state(mlxsw_sp_port->mlxsw_sp);
 
     if (!refcount_dec_and_test(&ptp_state->ptp_port_enabled_ref))
         return 0;
 
     err = mlxsw_sp2_ptp_disable(mlxsw_sp_port->mlxsw_sp, new_config);
     if (err)
         goto err_ptp_disable;
 
     return 0;
 
 err_ptp_disable:
     refcount_set(&ptp_state->ptp_port_enabled_ref, 1);
     return err;
 }
 
 int mlxsw_sp2_ptp_hwtstamp_set(struct mlxsw_sp_port *mlxsw_sp_port,
                    struct hwtstamp_config *config)
 {
     struct mlxsw_sp2_ptp_state *ptp_state;
     enum hwtstamp_rx_filters rx_filter;
     struct hwtstamp_config new_config;
     u16 new_ing_types, new_egr_types;
     bool ptp_enabled;
     int err;
 
     ptp_state = mlxsw_sp2_ptp_state(mlxsw_sp_port->mlxsw_sp);
     mutex_lock(&ptp_state->lock);
 
     err = mlxsw_sp2_ptp_get_message_types(config, &new_ing_types,
                           &new_egr_types, &rx_filter);
     if (err)
         goto err_get_message_types;
 
     new_config.flags = config->flags;
     new_config.tx_type = config->tx_type;
     new_config.rx_filter = rx_filter;
 
     ptp_enabled = mlxsw_sp_port->ptp.ing_types ||
               mlxsw_sp_port->ptp.egr_types;
 
     if ((new_ing_types || new_egr_types) && !ptp_enabled) {
         err = mlxsw_sp2_ptp_configure_port(mlxsw_sp_port, new_ing_types,
                            new_egr_types, new_config);
         if (err)
             goto err_configure_port;
     } else if (!new_ing_types && !new_egr_types && ptp_enabled) {
         err = mlxsw_sp2_ptp_deconfigure_port(mlxsw_sp_port, new_config);
         if (err)
             goto err_deconfigure_port;
     }
 
     mlxsw_sp_port->ptp.ing_types = new_ing_types;
     mlxsw_sp_port->ptp.egr_types = new_egr_types;
 
     /* Notify the ioctl caller what we are actually timestamping. */
     config->rx_filter = rx_filter;
     mutex_unlock(&ptp_state->lock);
 
     return 0;
 
 err_deconfigure_port:
 err_configure_port:
 err_get_message_types:
     mutex_unlock(&ptp_state->lock);
     return err;
 }
 
 int mlxsw_sp2_ptp_get_ts_info(struct mlxsw_sp *mlxsw_sp,
                   struct ethtool_ts_info *info)
 {
     info->phc_index = ptp_clock_index(mlxsw_sp->clock->ptp);
 
     info->so_timestamping = SOF_TIMESTAMPING_TX_HARDWARE |
                 SOF_TIMESTAMPING_RX_HARDWARE |
                 SOF_TIMESTAMPING_RAW_HARDWARE;
 
     info->tx_types = BIT(HWTSTAMP_TX_OFF) |
              BIT(HWTSTAMP_TX_ON);
 
     info->rx_filters = BIT(HWTSTAMP_FILTER_NONE) |
                BIT(HWTSTAMP_FILTER_PTP_V1_L4_EVENT) |
                BIT(HWTSTAMP_FILTER_PTP_V2_EVENT);
 
     return 0;
 }
 
 int mlxsw_sp_ptp_txhdr_construct(struct mlxsw_core *mlxsw_core,
                  struct mlxsw_sp_port *mlxsw_sp_port,
                  struct sk_buff *skb,
                  const struct mlxsw_tx_info *tx_info)
 {
     mlxsw_sp_txhdr_construct(skb, tx_info);
     return 0;
 }
 
 int mlxsw_sp2_ptp_txhdr_construct(struct mlxsw_core *mlxsw_core,
                   struct mlxsw_sp_port *mlxsw_sp_port,
                   struct sk_buff *skb,
                   const struct mlxsw_tx_info *tx_info)
 {
     /* In Spectrum-2 and Spectrum-3, in order for PTP event packets to have
      * their correction field correctly set on the egress port they must be
      * transmitted as data packets. Such packets ingress the ASIC via the
      * CPU port and must have a VLAN tag, as the CPU port is not configured
      * with a PVID. Push the default VLAN (4095), which is configured as
      * egress untagged on all the ports.
      */
     if (!skb_vlan_tagged(skb)) {
         skb = vlan_insert_tag_set_proto(skb, htons(ETH_P_8021Q),
                         MLXSW_SP_DEFAULT_VID);
         if (!skb) {
             this_cpu_inc(mlxsw_sp_port->pcpu_stats->tx_dropped);
             return -ENOMEM;
         }
     }
 
     return mlxsw_sp_txhdr_ptp_data_construct(mlxsw_core, mlxsw_sp_port, skb,
                          tx_info);
 }

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