drivers/net/ethernet/mellanox/mlxsw/spectrum_ptp.c

   1 // SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
   2 /* Copyright (c) 2019 Mellanox Technologies. All rights reserved */
   3
   4 #include <linux/ptp_clock_kernel.h>
   5 #include <linux/clocksource.h>
   6 #include <linux/timecounter.h>
   7 #include <linux/spinlock.h>
   8 #include <linux/device.h>
   9 #include <linux/rhashtable.h>
  10 #include <linux/ptp_classify.h>
  11 #include <linux/if_ether.h>
  12 #include <linux/if_vlan.h>
  13 #include <linux/net_tstamp.h>
  14
  15 #include "spectrum.h"
  16 #include "spectrum_ptp.h"
  17 #include "core.h"
  18
  19 #define MLXSW_SP1_PTP_CLOCK_CYCLES_SHIFT        29
  20 #define MLXSW_SP1_PTP_CLOCK_FREQ_KHZ            156257 /* 6.4nSec */
  21 #define MLXSW_SP1_PTP_CLOCK_MASK                64
  22
  23 #define MLXSW_SP1_PTP_HT_GC_INTERVAL            500 /* ms */
  24
  25 /* How long, approximately, should the unmatched entries stay in the hash table
  26  * before they are collected. Should be evenly divisible by the GC interval.
  27  */
  28 #define MLXSW_SP1_PTP_HT_GC_TIMEOUT             1000 /* ms */
  29
  30 struct mlxsw_sp_ptp_state {
  31         struct mlxsw_sp *mlxsw_sp;
  32         struct rhltable unmatched_ht;
  33         spinlock_t unmatched_lock; /* protects the HT */
  34         struct delayed_work ht_gc_dw;
  35         u32 gc_cycle;
  36 };
  37
  38 struct mlxsw_sp1_ptp_key {
  39         u8 local_port;
  40         u8 message_type;
  41         u16 sequence_id;
  42         u8 domain_number;
  43         bool ingress;
  44 };
  45
  46 struct mlxsw_sp1_ptp_unmatched {
  47         struct mlxsw_sp1_ptp_key key;
  48         struct rhlist_head ht_node;
  49         struct rcu_head rcu;
  50         struct sk_buff *skb;
  51         u64 timestamp;
  52         u32 gc_cycle;
  53 };
  54
  55 static const struct rhashtable_params mlxsw_sp1_ptp_unmatched_ht_params = {
  56         .key_len = sizeof_field(struct mlxsw_sp1_ptp_unmatched, key),
  57         .key_offset = offsetof(struct mlxsw_sp1_ptp_unmatched, key),
  58         .head_offset = offsetof(struct mlxsw_sp1_ptp_unmatched, ht_node),
  59 };
  60
  61 struct mlxsw_sp_ptp_clock {
  62         struct mlxsw_core *core;
  63         spinlock_t lock; /* protect this structure */
  64         struct cyclecounter cycles;
  65         struct timecounter tc;
  66         u32 nominal_c_mult;
  67         struct ptp_clock *ptp;
  68         struct ptp_clock_info ptp_info;
  69         unsigned long overflow_period;
  70         struct delayed_work overflow_work;
  71 };
  72
  73 static u64 __mlxsw_sp1_ptp_read_frc(struct mlxsw_sp_ptp_clock *clock,
  74                                     struct ptp_system_timestamp *sts)
  75 {
  76         struct mlxsw_core *mlxsw_core = clock->core;
  77         u32 frc_h1, frc_h2, frc_l;
  78
  79         frc_h1 = mlxsw_core_read_frc_h(mlxsw_core);
  80         ptp_read_system_prets(sts);
  81         frc_l = mlxsw_core_read_frc_l(mlxsw_core);
  82         ptp_read_system_postts(sts);
  83         frc_h2 = mlxsw_core_read_frc_h(mlxsw_core);
  84
  85         if (frc_h1 != frc_h2) {
  86                 /* wrap around */
  87                 ptp_read_system_prets(sts);
  88                 frc_l = mlxsw_core_read_frc_l(mlxsw_core);
  89                 ptp_read_system_postts(sts);
  90         }
  91
  92         return (u64) frc_l | (u64) frc_h2 << 32;
  93 }
  94
  95 static u64 mlxsw_sp1_ptp_read_frc(const struct cyclecounter *cc)
  96 {
  97         struct mlxsw_sp_ptp_clock *clock =
  98                 container_of(cc, struct mlxsw_sp_ptp_clock, cycles);
  99
 100         return __mlxsw_sp1_ptp_read_frc(clock, NULL) & cc->mask;
 101 }
 102
 103 static int
 104 mlxsw_sp1_ptp_phc_adjfreq(struct mlxsw_sp_ptp_clock *clock, int freq_adj)
 105 {
 106         struct mlxsw_core *mlxsw_core = clock->core;
 107         char mtutc_pl[MLXSW_REG_MTUTC_LEN];
 108
 109         mlxsw_reg_mtutc_pack(mtutc_pl, MLXSW_REG_MTUTC_OPERATION_ADJUST_FREQ,
 110                              freq_adj, 0);
 111         return mlxsw_reg_write(mlxsw_core, MLXSW_REG(mtutc), mtutc_pl);
 112 }
 113
 114 static u64 mlxsw_sp1_ptp_ns2cycles(const struct timecounter *tc, u64 nsec)
 115 {
 116         u64 cycles = (u64) nsec;
 117
 118         cycles <<= tc->cc->shift;
 119         cycles = div_u64(cycles, tc->cc->mult);
 120
 121         return cycles;
 122 }
 123
 124 static int
 125 mlxsw_sp1_ptp_phc_settime(struct mlxsw_sp_ptp_clock *clock, u64 nsec)
 126 {
 127         struct mlxsw_core *mlxsw_core = clock->core;
 128         u64 next_sec, next_sec_in_nsec, cycles;
 129         char mtutc_pl[MLXSW_REG_MTUTC_LEN];
 130         char mtpps_pl[MLXSW_REG_MTPPS_LEN];
 131         int err;
 132
 133         next_sec = div_u64(nsec, NSEC_PER_SEC) + 1;
 134         next_sec_in_nsec = next_sec * NSEC_PER_SEC;
 135
 136         spin_lock_bh(&clock->lock);
 137         cycles = mlxsw_sp1_ptp_ns2cycles(&clock->tc, next_sec_in_nsec);
 138         spin_unlock_bh(&clock->lock);
 139
 140         mlxsw_reg_mtpps_vpin_pack(mtpps_pl, cycles);
 141         err = mlxsw_reg_write(mlxsw_core, MLXSW_REG(mtpps), mtpps_pl);
 142         if (err)
 143                 return err;
 144
 145         mlxsw_reg_mtutc_pack(mtutc_pl,
 146                              MLXSW_REG_MTUTC_OPERATION_SET_TIME_AT_NEXT_SEC,
 147                              0, next_sec);
 148         return mlxsw_reg_write(mlxsw_core, MLXSW_REG(mtutc), mtutc_pl);
 149 }
 150
 151 static int mlxsw_sp1_ptp_adjfine(struct ptp_clock_info *ptp, long scaled_ppm)
 152 {
 153         struct mlxsw_sp_ptp_clock *clock =
 154                 container_of(ptp, struct mlxsw_sp_ptp_clock, ptp_info);
 155         int neg_adj = 0;
 156         u32 diff;
 157         u64 adj;
 158         s32 ppb;
 159
 160         ppb = scaled_ppm_to_ppb(scaled_ppm);
 161
 162         if (ppb < 0) {
 163                 neg_adj = 1;
 164                 ppb = -ppb;
 165         }
 166
 167         adj = clock->nominal_c_mult;
 168         adj *= ppb;
 169         diff = div_u64(adj, NSEC_PER_SEC);
 170
 171         spin_lock_bh(&clock->lock);
 172         timecounter_read(&clock->tc);
 173         clock->cycles.mult = neg_adj ? clock->nominal_c_mult - diff :
 174                                        clock->nominal_c_mult + diff;
 175         spin_unlock_bh(&clock->lock);
 176
 177         return mlxsw_sp1_ptp_phc_adjfreq(clock, neg_adj ? -ppb : ppb);
 178 }
 179
 180 static int mlxsw_sp1_ptp_adjtime(struct ptp_clock_info *ptp, s64 delta)
 181 {
 182         struct mlxsw_sp_ptp_clock *clock =
 183                 container_of(ptp, struct mlxsw_sp_ptp_clock, ptp_info);
 184         u64 nsec;
 185
 186         spin_lock_bh(&clock->lock);
 187         timecounter_adjtime(&clock->tc, delta);
 188         nsec = timecounter_read(&clock->tc);
 189         spin_unlock_bh(&clock->lock);
 190
 191         return mlxsw_sp1_ptp_phc_settime(clock, nsec);
 192 }
 193
 194 static int mlxsw_sp1_ptp_gettimex(struct ptp_clock_info *ptp,
 195                                   struct timespec64 *ts,
 196                                   struct ptp_system_timestamp *sts)
 197 {
 198         struct mlxsw_sp_ptp_clock *clock =
 199                 container_of(ptp, struct mlxsw_sp_ptp_clock, ptp_info);
 200         u64 cycles, nsec;
 201
 202         spin_lock_bh(&clock->lock);
 203         cycles = __mlxsw_sp1_ptp_read_frc(clock, sts);
 204         nsec = timecounter_cyc2time(&clock->tc, cycles);
 205         spin_unlock_bh(&clock->lock);
 206
 207         *ts = ns_to_timespec64(nsec);
 208
 209         return 0;
 210 }
 211
 212 static int mlxsw_sp1_ptp_settime(struct ptp_clock_info *ptp,
 213                                  const struct timespec64 *ts)
 214 {
 215         struct mlxsw_sp_ptp_clock *clock =
 216                 container_of(ptp, struct mlxsw_sp_ptp_clock, ptp_info);
 217         u64 nsec = timespec64_to_ns(ts);
 218
 219         spin_lock_bh(&clock->lock);
 220         timecounter_init(&clock->tc, &clock->cycles, nsec);
 221         nsec = timecounter_read(&clock->tc);
 222         spin_unlock_bh(&clock->lock);
 223
 224         return mlxsw_sp1_ptp_phc_settime(clock, nsec);
 225 }
 226
 227 static const struct ptp_clock_info mlxsw_sp1_ptp_clock_info = {
 228         .owner          = THIS_MODULE,
 229         .name           = "mlxsw_sp_clock",
 230         .max_adj        = 100000000,
 231         .adjfine        = mlxsw_sp1_ptp_adjfine,
 232         .adjtime        = mlxsw_sp1_ptp_adjtime,
 233         .gettimex64     = mlxsw_sp1_ptp_gettimex,
 234         .settime64      = mlxsw_sp1_ptp_settime,
 235 };
 236
 237 static void mlxsw_sp1_ptp_clock_overflow(struct work_struct *work)
 238 {
 239         struct delayed_work *dwork = to_delayed_work(work);
 240         struct mlxsw_sp_ptp_clock *clock;
 241
 242         clock = container_of(dwork, struct mlxsw_sp_ptp_clock, overflow_work);
 243
 244         spin_lock_bh(&clock->lock);
 245         timecounter_read(&clock->tc);
 246         spin_unlock_bh(&clock->lock);
 247         mlxsw_core_schedule_dw(&clock->overflow_work, clock->overflow_period);
 248 }
 249
 250 struct mlxsw_sp_ptp_clock *
 251 mlxsw_sp1_ptp_clock_init(struct mlxsw_sp *mlxsw_sp, struct device *dev)
 252 {
 253         u64 overflow_cycles, nsec, frac = 0;
 254         struct mlxsw_sp_ptp_clock *clock;
 255         int err;
 256
 257         clock = kzalloc(sizeof(*clock), GFP_KERNEL);
 258         if (!clock)
 259                 return ERR_PTR(-ENOMEM);
 260
 261         spin_lock_init(&clock->lock);
 262         clock->cycles.read = mlxsw_sp1_ptp_read_frc;
 263         clock->cycles.shift = MLXSW_SP1_PTP_CLOCK_CYCLES_SHIFT;
 264         clock->cycles.mult = clocksource_khz2mult(MLXSW_SP1_PTP_CLOCK_FREQ_KHZ,
 265                                                   clock->cycles.shift);
 266         clock->nominal_c_mult = clock->cycles.mult;
 267         clock->cycles.mask = CLOCKSOURCE_MASK(MLXSW_SP1_PTP_CLOCK_MASK);
 268         clock->core = mlxsw_sp->core;
 269
 270         timecounter_init(&clock->tc, &clock->cycles,
 271                          ktime_to_ns(ktime_get_real()));
 272
 273         /* Calculate period in seconds to call the overflow watchdog - to make
 274          * sure counter is checked at least twice every wrap around.
 275          * The period is calculated as the minimum between max HW cycles count
 276          * (The clock source mask) and max amount of cycles that can be
 277          * multiplied by clock multiplier where the result doesn't exceed
 278          * 64bits.
 279          */
 280         overflow_cycles = div64_u64(~0ULL >> 1, clock->cycles.mult);
 281         overflow_cycles = min(overflow_cycles, div_u64(clock->cycles.mask, 3));
 282
 283         nsec = cyclecounter_cyc2ns(&clock->cycles, overflow_cycles, 0, &frac);
 284         clock->overflow_period = nsecs_to_jiffies(nsec);
 285
 286         INIT_DELAYED_WORK(&clock->overflow_work, mlxsw_sp1_ptp_clock_overflow);
 287         mlxsw_core_schedule_dw(&clock->overflow_work, 0);
 288
 289         clock->ptp_info = mlxsw_sp1_ptp_clock_info;
 290         clock->ptp = ptp_clock_register(&clock->ptp_info, dev);
 291         if (IS_ERR(clock->ptp)) {
 292                 err = PTR_ERR(clock->ptp);
 293                 dev_err(dev, "ptp_clock_register failed %d\n", err);
 294                 goto err_ptp_clock_register;
 295         }
 296
 297         return clock;
 298
 299 err_ptp_clock_register:
 300         cancel_delayed_work_sync(&clock->overflow_work);
 301         kfree(clock);
 302         return ERR_PTR(err);
 303 }
 304
 305 void mlxsw_sp1_ptp_clock_fini(struct mlxsw_sp_ptp_clock *clock)
 306 {
 307         ptp_clock_unregister(clock->ptp);
 308         cancel_delayed_work_sync(&clock->overflow_work);
 309         kfree(clock);
 310 }
 311
 312 static int mlxsw_sp_ptp_parse(struct sk_buff *skb,
 313                               u8 *p_domain_number,
 314                               u8 *p_message_type,
 315                               u16 *p_sequence_id)
 316 {
 317         unsigned int offset = 0;
 318         unsigned int ptp_class;
 319         u8 *data;
 320
 321         data = skb_mac_header(skb);
 322         ptp_class = ptp_classify_raw(skb);
 323
 324         switch (ptp_class & PTP_CLASS_VMASK) {
 325         case PTP_CLASS_V1:
 326         case PTP_CLASS_V2:
 327                 break;
 328         default:
 329                 return -ERANGE;
 330         }
 331
 332         if (ptp_class & PTP_CLASS_VLAN)
 333                 offset += VLAN_HLEN;
 334
 335         switch (ptp_class & PTP_CLASS_PMASK) {
 336         case PTP_CLASS_IPV4:
 337                 offset += ETH_HLEN + IPV4_HLEN(data + offset) + UDP_HLEN;
 338                 break;
 339         case PTP_CLASS_IPV6:
 340                 offset += ETH_HLEN + IP6_HLEN + UDP_HLEN;
 341                 break;
 342         case PTP_CLASS_L2:
 343                 offset += ETH_HLEN;
 344                 break;
 345         default:
 346                 return -ERANGE;
 347         }
 348
 349         /* PTP header is 34 bytes. */
 350         if (skb->len < offset + 34)
 351                 return -EINVAL;
 352
 353         *p_message_type = data[offset] & 0x0f;
 354         *p_domain_number = data[offset + 4];
 355         *p_sequence_id = (u16)(data[offset + 30]) << 8 | data[offset + 31];
 356         return 0;
 357 }
 358
 359 /* Returns NULL on successful insertion, a pointer on conflict, or an ERR_PTR on
 360  * error.
 361  */
 362 static int
 363 mlxsw_sp1_ptp_unmatched_save(struct mlxsw_sp *mlxsw_sp,
 364                              struct mlxsw_sp1_ptp_key key,
 365                              struct sk_buff *skb,
 366                              u64 timestamp)
 367 {
 368         int cycles = MLXSW_SP1_PTP_HT_GC_TIMEOUT / MLXSW_SP1_PTP_HT_GC_INTERVAL;
 369         struct mlxsw_sp_ptp_state *ptp_state = mlxsw_sp->ptp_state;
 370         struct mlxsw_sp1_ptp_unmatched *unmatched;
 371         int err;
 372
 373         unmatched = kzalloc(sizeof(*unmatched), GFP_ATOMIC);
 374         if (!unmatched)
 375                 return -ENOMEM;
 376
 377         unmatched->key = key;
 378         unmatched->skb = skb;
 379         unmatched->timestamp = timestamp;
 380         unmatched->gc_cycle = mlxsw_sp->ptp_state->gc_cycle + cycles;
 381
 382         err = rhltable_insert(&ptp_state->unmatched_ht, &unmatched->ht_node,
 383                               mlxsw_sp1_ptp_unmatched_ht_params);
 384         if (err)
 385                 kfree(unmatched);
 386
 387         return err;
 388 }
 389
 390 static struct mlxsw_sp1_ptp_unmatched *
 391 mlxsw_sp1_ptp_unmatched_lookup(struct mlxsw_sp *mlxsw_sp,
 392                                struct mlxsw_sp1_ptp_key key, int *p_length)
 393 {
 394         struct mlxsw_sp1_ptp_unmatched *unmatched, *last = NULL;
 395         struct rhlist_head *tmp, *list;
 396         int length = 0;
 397
 398         list = rhltable_lookup(&mlxsw_sp->ptp_state->unmatched_ht, &key,
 399                                mlxsw_sp1_ptp_unmatched_ht_params);
 400         rhl_for_each_entry_rcu(unmatched, tmp, list, ht_node) {
 401                 last = unmatched;
 402                 length++;
 403         }
 404
 405         *p_length = length;
 406         return last;
 407 }
 408
 409 static int
 410 mlxsw_sp1_ptp_unmatched_remove(struct mlxsw_sp *mlxsw_sp,
 411                                struct mlxsw_sp1_ptp_unmatched *unmatched)
 412 {
 413         return rhltable_remove(&mlxsw_sp->ptp_state->unmatched_ht,
 414                                &unmatched->ht_node,
 415                                mlxsw_sp1_ptp_unmatched_ht_params);
 416 }
 417
 418 /* This function is called in the following scenarios:
 419  *
 420  * 1) When a packet is matched with its timestamp.
 421  * 2) In several situation when it is necessary to immediately pass on
 422  *    an SKB without a timestamp.
 423  * 3) From GC indirectly through mlxsw_sp1_ptp_unmatched_finish().
 424  *    This case is similar to 2) above.
 425  */
 426 static void mlxsw_sp1_ptp_packet_finish(struct mlxsw_sp *mlxsw_sp,
 427                                         struct sk_buff *skb, u8 local_port,
 428                                         bool ingress,
 429                                         struct skb_shared_hwtstamps *hwtstamps)
 430 {
 431         struct mlxsw_sp_port *mlxsw_sp_port;
 432
 433         /* Between capturing the packet and finishing it, there is a window of
 434          * opportunity for the originating port to go away (e.g. due to a
 435          * split). Also make sure the SKB device reference is still valid.
 436          */
 437         mlxsw_sp_port = mlxsw_sp->ports[local_port];
 438         if (!(mlxsw_sp_port && (!skb->dev || skb->dev == mlxsw_sp_port->dev))) {
 439                 dev_kfree_skb_any(skb);
 440                 return;
 441         }
 442
 443         if (ingress) {
 444                 if (hwtstamps)
 445                         *skb_hwtstamps(skb) = *hwtstamps;
 446                 mlxsw_sp_rx_listener_no_mark_func(skb, local_port, mlxsw_sp);
 447         } else {
 448                 /* skb_tstamp_tx() allows hwtstamps to be NULL. */
 449                 skb_tstamp_tx(skb, hwtstamps);
 450                 dev_kfree_skb_any(skb);
 451         }
 452 }
 453
 454 static void mlxsw_sp1_packet_timestamp(struct mlxsw_sp *mlxsw_sp,
 455                                        struct mlxsw_sp1_ptp_key key,
 456                                        struct sk_buff *skb,
 457                                        u64 timestamp)
 458 {
 459         struct skb_shared_hwtstamps hwtstamps;
 460         u64 nsec;
 461
 462         spin_lock_bh(&mlxsw_sp->clock->lock);
 463         nsec = timecounter_cyc2time(&mlxsw_sp->clock->tc, timestamp);
 464         spin_unlock_bh(&mlxsw_sp->clock->lock);
 465
 466         hwtstamps.hwtstamp = ns_to_ktime(nsec);
 467         mlxsw_sp1_ptp_packet_finish(mlxsw_sp, skb,
 468                                     key.local_port, key.ingress, &hwtstamps);
 469 }
 470
 471 static void
 472 mlxsw_sp1_ptp_unmatched_finish(struct mlxsw_sp *mlxsw_sp,
 473                                struct mlxsw_sp1_ptp_unmatched *unmatched)
 474 {
 475         if (unmatched->skb && unmatched->timestamp)
 476                 mlxsw_sp1_packet_timestamp(mlxsw_sp, unmatched->key,
 477                                            unmatched->skb,
 478                                            unmatched->timestamp);
 479         else if (unmatched->skb)
 480                 mlxsw_sp1_ptp_packet_finish(mlxsw_sp, unmatched->skb,
 481                                             unmatched->key.local_port,
 482                                             unmatched->key.ingress, NULL);
 483         kfree_rcu(unmatched, rcu);
 484 }
 485
 486 static void mlxsw_sp1_ptp_unmatched_free_fn(void *ptr, void *arg)
 487 {
 488         struct mlxsw_sp1_ptp_unmatched *unmatched = ptr;
 489
 490         /* This is invoked at a point where the ports are gone already. Nothing
 491          * to do with whatever is left in the HT but to free it.
 492          */
 493         if (unmatched->skb)
 494                 dev_kfree_skb_any(unmatched->skb);
 495         kfree_rcu(unmatched, rcu);
 496 }
 497
 498 static void mlxsw_sp1_ptp_got_piece(struct mlxsw_sp *mlxsw_sp,
 499                                     struct mlxsw_sp1_ptp_key key,
 500                                     struct sk_buff *skb, u64 timestamp)
 501 {
 502         struct mlxsw_sp1_ptp_unmatched *unmatched;
 503         int length;
 504         int err;
 505
 506         rcu_read_lock();
 507
 508         spin_lock(&mlxsw_sp->ptp_state->unmatched_lock);
 509
 510         unmatched = mlxsw_sp1_ptp_unmatched_lookup(mlxsw_sp, key, &length);
 511         if (skb && unmatched && unmatched->timestamp) {
 512                 unmatched->skb = skb;
 513         } else if (timestamp && unmatched && unmatched->skb) {
 514                 unmatched->timestamp = timestamp;
 515         } else {
 516                 /* Either there is no entry to match, or one that is there is
 517                  * incompatible.
 518                  */
 519                 if (length < 100)
 520                         err = mlxsw_sp1_ptp_unmatched_save(mlxsw_sp, key,
 521                                                            skb, timestamp);
 522                 else
 523                         err = -E2BIG;
 524                 if (err && skb)
 525                         mlxsw_sp1_ptp_packet_finish(mlxsw_sp, skb,
 526                                                     key.local_port,
 527                                                     key.ingress, NULL);
 528                 unmatched = NULL;
 529         }
 530
 531         if (unmatched) {
 532                 err = mlxsw_sp1_ptp_unmatched_remove(mlxsw_sp, unmatched);
 533                 WARN_ON_ONCE(err);
 534         }
 535
 536         spin_unlock(&mlxsw_sp->ptp_state->unmatched_lock);
 537
 538         if (unmatched)
 539                 mlxsw_sp1_ptp_unmatched_finish(mlxsw_sp, unmatched);
 540
 541         rcu_read_unlock();
 542 }
 543
 544 static void mlxsw_sp1_ptp_got_packet(struct mlxsw_sp *mlxsw_sp,
 545                                      struct sk_buff *skb, u8 local_port,
 546                                      bool ingress)
 547 {
 548         struct mlxsw_sp_port *mlxsw_sp_port;
 549         struct mlxsw_sp1_ptp_key key;
 550         u8 types;
 551         int err;
 552
 553         mlxsw_sp_port = mlxsw_sp->ports[local_port];
 554         if (!mlxsw_sp_port)
 555                 goto immediate;
 556
 557         types = ingress ? mlxsw_sp_port->ptp.ing_types :
 558                           mlxsw_sp_port->ptp.egr_types;
 559         if (!types)
 560                 goto immediate;
 561
 562         memset(&key, 0, sizeof(key));
 563         key.local_port = local_port;
 564         key.ingress = ingress;
 565
 566         err = mlxsw_sp_ptp_parse(skb, &key.domain_number, &key.message_type,
 567                                  &key.sequence_id);
 568         if (err)
 569                 goto immediate;
 570
 571         /* For packets whose timestamping was not enabled on this port, don't
 572          * bother trying to match the timestamp.
 573          */
 574         if (!((1 << key.message_type) & types))
 575                 goto immediate;
 576
 577         mlxsw_sp1_ptp_got_piece(mlxsw_sp, key, skb, 0);
 578         return;
 579
 580 immediate:
 581         mlxsw_sp1_ptp_packet_finish(mlxsw_sp, skb, local_port, ingress, NULL);
 582 }
 583
 584 void mlxsw_sp1_ptp_got_timestamp(struct mlxsw_sp *mlxsw_sp, bool ingress,
 585                                  u8 local_port, u8 message_type,
 586                                  u8 domain_number, u16 sequence_id,
 587                                  u64 timestamp)
 588 {
 589         struct mlxsw_sp_port *mlxsw_sp_port;
 590         struct mlxsw_sp1_ptp_key key;
 591         u8 types;
 592
 593         mlxsw_sp_port = mlxsw_sp->ports[local_port];
 594         if (!mlxsw_sp_port)
 595                 return;
 596
 597         types = ingress ? mlxsw_sp_port->ptp.ing_types :
 598                           mlxsw_sp_port->ptp.egr_types;
 599
 600         /* For message types whose timestamping was not enabled on this port,
 601          * don't bother with the timestamp.
 602          */
 603         if (!((1 << message_type) & types))
 604                 return;
 605
 606         memset(&key, 0, sizeof(key));
 607         key.local_port = local_port;
 608         key.domain_number = domain_number;
 609         key.message_type = message_type;
 610         key.sequence_id = sequence_id;
 611         key.ingress = ingress;
 612
 613         mlxsw_sp1_ptp_got_piece(mlxsw_sp, key, NULL, timestamp);
 614 }
 615
 616 void mlxsw_sp1_ptp_receive(struct mlxsw_sp *mlxsw_sp, struct sk_buff *skb,
 617                            u8 local_port)
 618 {
 619         skb_reset_mac_header(skb);
 620         mlxsw_sp1_ptp_got_packet(mlxsw_sp, skb, local_port, true);
 621 }
 622
 623 void mlxsw_sp1_ptp_transmitted(struct mlxsw_sp *mlxsw_sp,
 624                                struct sk_buff *skb, u8 local_port)
 625 {
 626         mlxsw_sp1_ptp_got_packet(mlxsw_sp, skb, local_port, false);
 627 }
 628
 629 static void
 630 mlxsw_sp1_ptp_ht_gc_collect(struct mlxsw_sp_ptp_state *ptp_state,
 631                             struct mlxsw_sp1_ptp_unmatched *unmatched)
 632 {
 633         int err;
 634
 635         /* If an unmatched entry has an SKB, it has to be handed over to the
 636          * networking stack. This is usually done from a trap handler, which is
 637          * invoked in a softirq context. Here we are going to do it in process
 638          * context. If that were to be interrupted by a softirq, it could cause
 639          * a deadlock when an attempt is made to take an already-taken lock
 640          * somewhere along the sending path. Disable softirqs to prevent this.
 641          */
 642         local_bh_disable();
 643
 644         spin_lock(&ptp_state->unmatched_lock);
 645         err = rhltable_remove(&ptp_state->unmatched_ht, &unmatched->ht_node,
 646                               mlxsw_sp1_ptp_unmatched_ht_params);
 647         spin_unlock(&ptp_state->unmatched_lock);
 648
 649         if (err)
 650                 /* The packet was matched with timestamp during the walk. */
 651                 goto out;
 652
 653         /* mlxsw_sp1_ptp_unmatched_finish() invokes netif_receive_skb(). While
 654          * the comment at that function states that it can only be called in
 655          * soft IRQ context, this pattern of local_bh_disable() +
 656          * netif_receive_skb(), in process context, is seen elsewhere in the
 657          * kernel, notably in pktgen.
 658          */
 659         mlxsw_sp1_ptp_unmatched_finish(ptp_state->mlxsw_sp, unmatched);
 660
 661 out:
 662         local_bh_enable();
 663 }
 664
 665 static void mlxsw_sp1_ptp_ht_gc(struct work_struct *work)
 666 {
 667         struct delayed_work *dwork = to_delayed_work(work);
 668         struct mlxsw_sp1_ptp_unmatched *unmatched;
 669         struct mlxsw_sp_ptp_state *ptp_state;
 670         struct rhashtable_iter iter;
 671         u32 gc_cycle;
 672         void *obj;
 673
 674         ptp_state = container_of(dwork, struct mlxsw_sp_ptp_state, ht_gc_dw);
 675         gc_cycle = ptp_state->gc_cycle++;
 676
 677         rhltable_walk_enter(&ptp_state->unmatched_ht, &iter);
 678         rhashtable_walk_start(&iter);
 679         while ((obj = rhashtable_walk_next(&iter))) {
 680                 if (IS_ERR(obj))
 681                         continue;
 682
 683                 unmatched = obj;
 684                 if (unmatched->gc_cycle <= gc_cycle)
 685                         mlxsw_sp1_ptp_ht_gc_collect(ptp_state, unmatched);
 686         }
 687         rhashtable_walk_stop(&iter);
 688         rhashtable_walk_exit(&iter);
 689
 690         mlxsw_core_schedule_dw(&ptp_state->ht_gc_dw,
 691                                MLXSW_SP1_PTP_HT_GC_INTERVAL);
 692 }
 693
 694 static int mlxsw_sp_ptp_mtptpt_set(struct mlxsw_sp *mlxsw_sp,
 695                                    enum mlxsw_reg_mtptpt_trap_id trap_id,
 696                                    u16 message_type)
 697 {
 698         char mtptpt_pl[MLXSW_REG_MTPTPT_LEN];
 699
 700         mlxsw_reg_mtptptp_pack(mtptpt_pl, trap_id, message_type);
 701         return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(mtptpt), mtptpt_pl);
 702 }
 703
 704 static int mlxsw_sp1_ptp_set_fifo_clr_on_trap(struct mlxsw_sp *mlxsw_sp,
 705                                               bool clr)
 706 {
 707         char mogcr_pl[MLXSW_REG_MOGCR_LEN] = {0};
 708         int err;
 709
 710         err = mlxsw_reg_query(mlxsw_sp->core, MLXSW_REG(mogcr), mogcr_pl);
 711         if (err)
 712                 return err;
 713
 714         mlxsw_reg_mogcr_ptp_iftc_set(mogcr_pl, clr);
 715         mlxsw_reg_mogcr_ptp_eftc_set(mogcr_pl, clr);
 716         return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(mogcr), mogcr_pl);
 717 }
 718
 719 static int mlxsw_sp1_ptp_mtpppc_set(struct mlxsw_sp *mlxsw_sp,
 720                                     u16 ing_types, u16 egr_types)
 721 {
 722         char mtpppc_pl[MLXSW_REG_MTPPPC_LEN];
 723
 724         mlxsw_reg_mtpppc_pack(mtpppc_pl, ing_types, egr_types);
 725         return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(mtpppc), mtpppc_pl);
 726 }
 727
 728 struct mlxsw_sp1_ptp_shaper_params {
 729         u32 ethtool_speed;
 730         enum mlxsw_reg_qpsc_port_speed port_speed;
 731         u8 shaper_time_exp;
 732         u8 shaper_time_mantissa;
 733         u8 shaper_inc;
 734         u8 shaper_bs;
 735         u8 port_to_shaper_credits;
 736         int ing_timestamp_inc;
 737         int egr_timestamp_inc;
 738 };
 739
 740 static const struct mlxsw_sp1_ptp_shaper_params
 741 mlxsw_sp1_ptp_shaper_params[] = {
 742         {
 743                 .ethtool_speed          = SPEED_100,
 744                 .port_speed             = MLXSW_REG_QPSC_PORT_SPEED_100M,
 745                 .shaper_time_exp        = 4,
 746                 .shaper_time_mantissa   = 12,
 747                 .shaper_inc             = 9,
 748                 .shaper_bs              = 1,
 749                 .port_to_shaper_credits = 1,
 750                 .ing_timestamp_inc      = -313,
 751                 .egr_timestamp_inc      = 313,
 752         },
 753         {
 754                 .ethtool_speed          = SPEED_1000,
 755                 .port_speed             = MLXSW_REG_QPSC_PORT_SPEED_1G,
 756                 .shaper_time_exp        = 0,
 757                 .shaper_time_mantissa   = 12,
 758                 .shaper_inc             = 6,
 759                 .shaper_bs              = 0,
 760                 .port_to_shaper_credits = 1,
 761                 .ing_timestamp_inc      = -35,
 762                 .egr_timestamp_inc      = 35,
 763         },
 764         {
 765                 .ethtool_speed          = SPEED_10000,
 766                 .port_speed             = MLXSW_REG_QPSC_PORT_SPEED_10G,
 767                 .shaper_time_exp        = 0,
 768                 .shaper_time_mantissa   = 2,
 769                 .shaper_inc             = 14,
 770                 .shaper_bs              = 1,
 771                 .port_to_shaper_credits = 1,
 772                 .ing_timestamp_inc      = -11,
 773                 .egr_timestamp_inc      = 11,
 774         },
 775         {
 776                 .ethtool_speed          = SPEED_25000,
 777                 .port_speed             = MLXSW_REG_QPSC_PORT_SPEED_25G,
 778                 .shaper_time_exp        = 0,
 779                 .shaper_time_mantissa   = 0,
 780                 .shaper_inc             = 11,
 781                 .shaper_bs              = 1,
 782                 .port_to_shaper_credits = 1,
 783                 .ing_timestamp_inc      = -14,
 784                 .egr_timestamp_inc      = 14,
 785         },
 786 };
 787
 788 #define MLXSW_SP1_PTP_SHAPER_PARAMS_LEN ARRAY_SIZE(mlxsw_sp1_ptp_shaper_params)
 789
 790 static int mlxsw_sp1_ptp_shaper_params_set(struct mlxsw_sp *mlxsw_sp)
 791 {
 792         const struct mlxsw_sp1_ptp_shaper_params *params;
 793         char qpsc_pl[MLXSW_REG_QPSC_LEN];
 794         int i, err;
 795
 796         for (i = 0; i < MLXSW_SP1_PTP_SHAPER_PARAMS_LEN; i++) {
 797                 params = &mlxsw_sp1_ptp_shaper_params[i];
 798                 mlxsw_reg_qpsc_pack(qpsc_pl, params->port_speed,
 799                                     params->shaper_time_exp,
 800                                     params->shaper_time_mantissa,
 801                                     params->shaper_inc, params->shaper_bs,
 802                                     params->port_to_shaper_credits,
 803                                     params->ing_timestamp_inc,
 804                                     params->egr_timestamp_inc);
 805                 err = mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(qpsc), qpsc_pl);
 806                 if (err)
 807                         return err;
 808         }
 809
 810         return 0;
 811 }
 812
 813 struct mlxsw_sp_ptp_state *mlxsw_sp1_ptp_init(struct mlxsw_sp *mlxsw_sp)
 814 {
 815         struct mlxsw_sp_ptp_state *ptp_state;
 816         u16 message_type;
 817         int err;
 818
 819         err = mlxsw_sp1_ptp_shaper_params_set(mlxsw_sp);
 820         if (err)
 821                 return ERR_PTR(err);
 822
 823         ptp_state = kzalloc(sizeof(*ptp_state), GFP_KERNEL);
 824         if (!ptp_state)
 825                 return ERR_PTR(-ENOMEM);
 826         ptp_state->mlxsw_sp = mlxsw_sp;
 827
 828         spin_lock_init(&ptp_state->unmatched_lock);
 829
 830         err = rhltable_init(&ptp_state->unmatched_ht,
 831                             &mlxsw_sp1_ptp_unmatched_ht_params);
 832         if (err)
 833                 goto err_hashtable_init;
 834
 835         /* Delive these message types as PTP0. */
 836         message_type = BIT(MLXSW_SP_PTP_MESSAGE_TYPE_SYNC) |
 837                        BIT(MLXSW_SP_PTP_MESSAGE_TYPE_DELAY_REQ) |
 838                        BIT(MLXSW_SP_PTP_MESSAGE_TYPE_PDELAY_REQ) |
 839                        BIT(MLXSW_SP_PTP_MESSAGE_TYPE_PDELAY_RESP);
 840         err = mlxsw_sp_ptp_mtptpt_set(mlxsw_sp, MLXSW_REG_MTPTPT_TRAP_ID_PTP0,
 841                                       message_type);
 842         if (err)
 843                 goto err_mtptpt_set;
 844
 845         /* Everything else is PTP1. */
 846         message_type = ~message_type;
 847         err = mlxsw_sp_ptp_mtptpt_set(mlxsw_sp, MLXSW_REG_MTPTPT_TRAP_ID_PTP1,
 848                                       message_type);
 849         if (err)
 850                 goto err_mtptpt1_set;
 851
 852         err = mlxsw_sp1_ptp_set_fifo_clr_on_trap(mlxsw_sp, true);
 853         if (err)
 854                 goto err_fifo_clr;
 855
 856         INIT_DELAYED_WORK(&ptp_state->ht_gc_dw, mlxsw_sp1_ptp_ht_gc);
 857         mlxsw_core_schedule_dw(&ptp_state->ht_gc_dw,
 858                                MLXSW_SP1_PTP_HT_GC_INTERVAL);
 859         return ptp_state;
 860
 861 err_fifo_clr:
 862         mlxsw_sp_ptp_mtptpt_set(mlxsw_sp, MLXSW_REG_MTPTPT_TRAP_ID_PTP1, 0);
 863 err_mtptpt1_set:
 864         mlxsw_sp_ptp_mtptpt_set(mlxsw_sp, MLXSW_REG_MTPTPT_TRAP_ID_PTP0, 0);
 865 err_mtptpt_set:
 866         rhltable_destroy(&ptp_state->unmatched_ht);
 867 err_hashtable_init:
 868         kfree(ptp_state);
 869         return ERR_PTR(err);
 870 }
 871
 872 void mlxsw_sp1_ptp_fini(struct mlxsw_sp_ptp_state *ptp_state)
 873 {
 874         struct mlxsw_sp *mlxsw_sp = ptp_state->mlxsw_sp;
 875
 876         cancel_delayed_work_sync(&ptp_state->ht_gc_dw);
 877         mlxsw_sp1_ptp_mtpppc_set(mlxsw_sp, 0, 0);
 878         mlxsw_sp1_ptp_set_fifo_clr_on_trap(mlxsw_sp, false);
 879         mlxsw_sp_ptp_mtptpt_set(mlxsw_sp, MLXSW_REG_MTPTPT_TRAP_ID_PTP1, 0);
 880         mlxsw_sp_ptp_mtptpt_set(mlxsw_sp, MLXSW_REG_MTPTPT_TRAP_ID_PTP0, 0);
 881         rhltable_free_and_destroy(&ptp_state->unmatched_ht,
 882                                   &mlxsw_sp1_ptp_unmatched_free_fn, NULL);
 883         kfree(ptp_state);
 884 }
 885
 886 int mlxsw_sp1_ptp_hwtstamp_get(struct mlxsw_sp_port *mlxsw_sp_port,
 887                                struct hwtstamp_config *config)
 888 {
 889         *config = mlxsw_sp_port->ptp.hwtstamp_config;
 890         return 0;
 891 }
 892
 893 static int mlxsw_sp_ptp_get_message_types(const struct hwtstamp_config *config,
 894                                           u16 *p_ing_types, u16 *p_egr_types,
 895                                           enum hwtstamp_rx_filters *p_rx_filter)
 896 {
 897         enum hwtstamp_rx_filters rx_filter = config->rx_filter;
 898         enum hwtstamp_tx_types tx_type = config->tx_type;
 899         u16 ing_types = 0x00;
 900         u16 egr_types = 0x00;
 901
 902         switch (tx_type) {
 903         case HWTSTAMP_TX_OFF:
 904                 egr_types = 0x00;
 905                 break;
 906         case HWTSTAMP_TX_ON:
 907                 egr_types = 0xff;
 908                 break;
 909         case HWTSTAMP_TX_ONESTEP_SYNC:
 910                 return -ERANGE;
 911         }
 912
 913         switch (rx_filter) {
 914         case HWTSTAMP_FILTER_NONE:
 915                 ing_types = 0x00;
 916                 break;
 917         case HWTSTAMP_FILTER_PTP_V1_L4_SYNC:
 918         case HWTSTAMP_FILTER_PTP_V2_L4_SYNC:
 919         case HWTSTAMP_FILTER_PTP_V2_L2_SYNC:
 920         case HWTSTAMP_FILTER_PTP_V2_SYNC:
 921                 ing_types = 0x01;
 922                 break;
 923         case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ:
 924         case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ:
 925         case HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ:
 926         case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ:
 927                 ing_types = 0x02;
 928                 break;
 929         case HWTSTAMP_FILTER_PTP_V1_L4_EVENT:
 930         case HWTSTAMP_FILTER_PTP_V2_L4_EVENT:
 931         case HWTSTAMP_FILTER_PTP_V2_L2_EVENT:
 932         case HWTSTAMP_FILTER_PTP_V2_EVENT:
 933                 ing_types = 0x0f;
 934                 break;
 935         case HWTSTAMP_FILTER_ALL:
 936                 ing_types = 0xff;
 937                 break;
 938         case HWTSTAMP_FILTER_SOME:
 939         case HWTSTAMP_FILTER_NTP_ALL:
 940                 return -ERANGE;
 941         }
 942
 943         *p_ing_types = ing_types;
 944         *p_egr_types = egr_types;
 945         *p_rx_filter = rx_filter;
 946         return 0;
 947 }
 948
 949 static int mlxsw_sp1_ptp_mtpppc_update(struct mlxsw_sp_port *mlxsw_sp_port,
 950                                        u16 ing_types, u16 egr_types)
 951 {
 952         struct mlxsw_sp *mlxsw_sp = mlxsw_sp_port->mlxsw_sp;
 953         struct mlxsw_sp_port *tmp;
 954         u16 orig_ing_types = 0;
 955         u16 orig_egr_types = 0;
 956         int err;
 957         int i;
 958
 959         /* MTPPPC configures timestamping globally, not per port. Find the
 960          * configuration that contains all configured timestamping requests.
 961          */
 962         for (i = 1; i < mlxsw_core_max_ports(mlxsw_sp->core); i++) {
 963                 tmp = mlxsw_sp->ports[i];
 964                 if (tmp) {
 965                         orig_ing_types |= tmp->ptp.ing_types;
 966                         orig_egr_types |= tmp->ptp.egr_types;
 967                 }
 968                 if (tmp && tmp != mlxsw_sp_port) {
 969                         ing_types |= tmp->ptp.ing_types;
 970                         egr_types |= tmp->ptp.egr_types;
 971                 }
 972         }
 973
 974         if ((ing_types || egr_types) && !(orig_ing_types || orig_egr_types)) {
 975                 err = mlxsw_sp_nve_inc_parsing_depth_get(mlxsw_sp);
 976                 if (err) {
 977                         netdev_err(mlxsw_sp_port->dev, "Failed to increase parsing depth");
 978                         return err;
 979                 }
 980         }
 981         if (!(ing_types || egr_types) && (orig_ing_types || orig_egr_types))
 982                 mlxsw_sp_nve_inc_parsing_depth_put(mlxsw_sp);
 983
 984         return mlxsw_sp1_ptp_mtpppc_set(mlxsw_sp_port->mlxsw_sp,
 985                                        ing_types, egr_types);
 986 }
 987
 988 static bool mlxsw_sp1_ptp_hwtstamp_enabled(struct mlxsw_sp_port *mlxsw_sp_port)
 989 {
 990         return mlxsw_sp_port->ptp.ing_types || mlxsw_sp_port->ptp.egr_types;
 991 }
 992
 993 static int
 994 mlxsw_sp1_ptp_port_shaper_set(struct mlxsw_sp_port *mlxsw_sp_port, bool enable)
 995 {
 996         struct mlxsw_sp *mlxsw_sp = mlxsw_sp_port->mlxsw_sp;
 997         char qeec_pl[MLXSW_REG_QEEC_LEN];
 998
 999         mlxsw_reg_qeec_ptps_pack(qeec_pl, mlxsw_sp_port->local_port, enable);
1000         return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(qeec), qeec_pl);
1001 }
1002
1003 static int mlxsw_sp1_ptp_port_shaper_check(struct mlxsw_sp_port *mlxsw_sp_port)
1004 {
1005         const struct mlxsw_sp_port_type_speed_ops *port_type_speed_ops;
1006         struct mlxsw_sp *mlxsw_sp = mlxsw_sp_port->mlxsw_sp;
1007         char ptys_pl[MLXSW_REG_PTYS_LEN];
1008         u32 eth_proto_oper, speed;
1009         bool ptps = false;
1010         int err, i;
1011
1012         if (!mlxsw_sp1_ptp_hwtstamp_enabled(mlxsw_sp_port))
1013                 return mlxsw_sp1_ptp_port_shaper_set(mlxsw_sp_port, false);
1014
1015         port_type_speed_ops = mlxsw_sp->port_type_speed_ops;
1016         port_type_speed_ops->reg_ptys_eth_pack(mlxsw_sp, ptys_pl,
1017                                                mlxsw_sp_port->local_port, 0,
1018                                                false);
1019         err = mlxsw_reg_query(mlxsw_sp->core, MLXSW_REG(ptys), ptys_pl);
1020         if (err)
1021                 return err;
1022         port_type_speed_ops->reg_ptys_eth_unpack(mlxsw_sp, ptys_pl, NULL, NULL,
1023                                                  &eth_proto_oper);
1024
1025         speed = port_type_speed_ops->from_ptys_speed(mlxsw_sp, eth_proto_oper);
1026         for (i = 0; i < MLXSW_SP1_PTP_SHAPER_PARAMS_LEN; i++) {
1027                 if (mlxsw_sp1_ptp_shaper_params[i].ethtool_speed == speed) {
1028                         ptps = true;
1029                         break;
1030                 }
1031         }
1032
1033         return mlxsw_sp1_ptp_port_shaper_set(mlxsw_sp_port, ptps);
1034 }
1035
1036 void mlxsw_sp1_ptp_shaper_work(struct work_struct *work)
1037 {
1038         struct delayed_work *dwork = to_delayed_work(work);
1039         struct mlxsw_sp_port *mlxsw_sp_port;
1040         int err;
1041
1042         mlxsw_sp_port = container_of(dwork, struct mlxsw_sp_port,
1043                                      ptp.shaper_dw);
1044
1045         if (!mlxsw_sp1_ptp_hwtstamp_enabled(mlxsw_sp_port))
1046                 return;
1047
1048         err = mlxsw_sp1_ptp_port_shaper_check(mlxsw_sp_port);
1049         if (err)
1050                 netdev_err(mlxsw_sp_port->dev, "Failed to set up PTP shaper\n");
1051 }
1052
1053 int mlxsw_sp1_ptp_hwtstamp_set(struct mlxsw_sp_port *mlxsw_sp_port,
1054                                struct hwtstamp_config *config)
1055 {
1056         enum hwtstamp_rx_filters rx_filter;
1057         u16 ing_types;
1058         u16 egr_types;
1059         int err;
1060
1061         err = mlxsw_sp_ptp_get_message_types(config, &ing_types, &egr_types,
1062                                              &rx_filter);
1063         if (err)
1064                 return err;
1065
1066         err = mlxsw_sp1_ptp_mtpppc_update(mlxsw_sp_port, ing_types, egr_types);
1067         if (err)
1068                 return err;
1069
1070         mlxsw_sp_port->ptp.hwtstamp_config = *config;
1071         mlxsw_sp_port->ptp.ing_types = ing_types;
1072         mlxsw_sp_port->ptp.egr_types = egr_types;
1073
1074         err = mlxsw_sp1_ptp_port_shaper_check(mlxsw_sp_port);
1075         if (err)
1076                 return err;
1077
1078         /* Notify the ioctl caller what we are actually timestamping. */
1079         config->rx_filter = rx_filter;
1080
1081         return 0;
1082 }
1083
1084 int mlxsw_sp1_ptp_get_ts_info(struct mlxsw_sp *mlxsw_sp,
1085                               struct ethtool_ts_info *info)
1086 {
1087         info->phc_index = ptp_clock_index(mlxsw_sp->clock->ptp);
1088
1089         info->so_timestamping = SOF_TIMESTAMPING_TX_HARDWARE |
1090                                 SOF_TIMESTAMPING_RX_HARDWARE |
1091                                 SOF_TIMESTAMPING_RAW_HARDWARE;
1092
1093         info->tx_types = BIT(HWTSTAMP_TX_OFF) |
1094                          BIT(HWTSTAMP_TX_ON);
1095
1096         info->rx_filters = BIT(HWTSTAMP_FILTER_NONE) |
1097                            BIT(HWTSTAMP_FILTER_ALL);
1098
1099         return 0;
1100 }