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 ptp_class;
 318         struct ptp_header *hdr;
 319
 320         ptp_class = ptp_classify_raw(skb);
 321
 322         switch (ptp_class & PTP_CLASS_VMASK) {
 323         case PTP_CLASS_V1:
 324         case PTP_CLASS_V2:
 325                 break;
 326         default:
 327                 return -ERANGE;
 328         }
 329
 330         hdr = ptp_parse_header(skb, ptp_class);
 331         if (!hdr)
 332                 return -EINVAL;
 333
 334         *p_message_type  = ptp_get_msgtype(hdr, ptp_class);
 335         *p_domain_number = hdr->domain_number;
 336         *p_sequence_id   = be16_to_cpu(hdr->sequence_id);
 337
 338         return 0;
 339 }
 340
 341 /* Returns NULL on successful insertion, a pointer on conflict, or an ERR_PTR on
 342  * error.
 343  */
 344 static int
 345 mlxsw_sp1_ptp_unmatched_save(struct mlxsw_sp *mlxsw_sp,
 346                              struct mlxsw_sp1_ptp_key key,
 347                              struct sk_buff *skb,
 348                              u64 timestamp)
 349 {
 350         int cycles = MLXSW_SP1_PTP_HT_GC_TIMEOUT / MLXSW_SP1_PTP_HT_GC_INTERVAL;
 351         struct mlxsw_sp_ptp_state *ptp_state = mlxsw_sp->ptp_state;
 352         struct mlxsw_sp1_ptp_unmatched *unmatched;
 353         int err;
 354
 355         unmatched = kzalloc(sizeof(*unmatched), GFP_ATOMIC);
 356         if (!unmatched)
 357                 return -ENOMEM;
 358
 359         unmatched->key = key;
 360         unmatched->skb = skb;
 361         unmatched->timestamp = timestamp;
 362         unmatched->gc_cycle = mlxsw_sp->ptp_state->gc_cycle + cycles;
 363
 364         err = rhltable_insert(&ptp_state->unmatched_ht, &unmatched->ht_node,
 365                               mlxsw_sp1_ptp_unmatched_ht_params);
 366         if (err)
 367                 kfree(unmatched);
 368
 369         return err;
 370 }
 371
 372 static struct mlxsw_sp1_ptp_unmatched *
 373 mlxsw_sp1_ptp_unmatched_lookup(struct mlxsw_sp *mlxsw_sp,
 374                                struct mlxsw_sp1_ptp_key key, int *p_length)
 375 {
 376         struct mlxsw_sp1_ptp_unmatched *unmatched, *last = NULL;
 377         struct rhlist_head *tmp, *list;
 378         int length = 0;
 379
 380         list = rhltable_lookup(&mlxsw_sp->ptp_state->unmatched_ht, &key,
 381                                mlxsw_sp1_ptp_unmatched_ht_params);
 382         rhl_for_each_entry_rcu(unmatched, tmp, list, ht_node) {
 383                 last = unmatched;
 384                 length++;
 385         }
 386
 387         *p_length = length;
 388         return last;
 389 }
 390
 391 static int
 392 mlxsw_sp1_ptp_unmatched_remove(struct mlxsw_sp *mlxsw_sp,
 393                                struct mlxsw_sp1_ptp_unmatched *unmatched)
 394 {
 395         return rhltable_remove(&mlxsw_sp->ptp_state->unmatched_ht,
 396                                &unmatched->ht_node,
 397                                mlxsw_sp1_ptp_unmatched_ht_params);
 398 }
 399
 400 /* This function is called in the following scenarios:
 401  *
 402  * 1) When a packet is matched with its timestamp.
 403  * 2) In several situation when it is necessary to immediately pass on
 404  *    an SKB without a timestamp.
 405  * 3) From GC indirectly through mlxsw_sp1_ptp_unmatched_finish().
 406  *    This case is similar to 2) above.
 407  */
 408 static void mlxsw_sp1_ptp_packet_finish(struct mlxsw_sp *mlxsw_sp,
 409                                         struct sk_buff *skb, u8 local_port,
 410                                         bool ingress,
 411                                         struct skb_shared_hwtstamps *hwtstamps)
 412 {
 413         struct mlxsw_sp_port *mlxsw_sp_port;
 414
 415         /* Between capturing the packet and finishing it, there is a window of
 416          * opportunity for the originating port to go away (e.g. due to a
 417          * split). Also make sure the SKB device reference is still valid.
 418          */
 419         mlxsw_sp_port = mlxsw_sp->ports[local_port];
 420         if (!(mlxsw_sp_port && (!skb->dev || skb->dev == mlxsw_sp_port->dev))) {
 421                 dev_kfree_skb_any(skb);
 422                 return;
 423         }
 424
 425         if (ingress) {
 426                 if (hwtstamps)
 427                         *skb_hwtstamps(skb) = *hwtstamps;
 428                 mlxsw_sp_rx_listener_no_mark_func(skb, local_port, mlxsw_sp);
 429         } else {
 430                 /* skb_tstamp_tx() allows hwtstamps to be NULL. */
 431                 skb_tstamp_tx(skb, hwtstamps);
 432                 dev_kfree_skb_any(skb);
 433         }
 434 }
 435
 436 static void mlxsw_sp1_packet_timestamp(struct mlxsw_sp *mlxsw_sp,
 437                                        struct mlxsw_sp1_ptp_key key,
 438                                        struct sk_buff *skb,
 439                                        u64 timestamp)
 440 {
 441         struct skb_shared_hwtstamps hwtstamps;
 442         u64 nsec;
 443
 444         spin_lock_bh(&mlxsw_sp->clock->lock);
 445         nsec = timecounter_cyc2time(&mlxsw_sp->clock->tc, timestamp);
 446         spin_unlock_bh(&mlxsw_sp->clock->lock);
 447
 448         hwtstamps.hwtstamp = ns_to_ktime(nsec);
 449         mlxsw_sp1_ptp_packet_finish(mlxsw_sp, skb,
 450                                     key.local_port, key.ingress, &hwtstamps);
 451 }
 452
 453 static void
 454 mlxsw_sp1_ptp_unmatched_finish(struct mlxsw_sp *mlxsw_sp,
 455                                struct mlxsw_sp1_ptp_unmatched *unmatched)
 456 {
 457         if (unmatched->skb && unmatched->timestamp)
 458                 mlxsw_sp1_packet_timestamp(mlxsw_sp, unmatched->key,
 459                                            unmatched->skb,
 460                                            unmatched->timestamp);
 461         else if (unmatched->skb)
 462                 mlxsw_sp1_ptp_packet_finish(mlxsw_sp, unmatched->skb,
 463                                             unmatched->key.local_port,
 464                                             unmatched->key.ingress, NULL);
 465         kfree_rcu(unmatched, rcu);
 466 }
 467
 468 static void mlxsw_sp1_ptp_unmatched_free_fn(void *ptr, void *arg)
 469 {
 470         struct mlxsw_sp1_ptp_unmatched *unmatched = ptr;
 471
 472         /* This is invoked at a point where the ports are gone already. Nothing
 473          * to do with whatever is left in the HT but to free it.
 474          */
 475         if (unmatched->skb)
 476                 dev_kfree_skb_any(unmatched->skb);
 477         kfree_rcu(unmatched, rcu);
 478 }
 479
 480 static void mlxsw_sp1_ptp_got_piece(struct mlxsw_sp *mlxsw_sp,
 481                                     struct mlxsw_sp1_ptp_key key,
 482                                     struct sk_buff *skb, u64 timestamp)
 483 {
 484         struct mlxsw_sp1_ptp_unmatched *unmatched;
 485         int length;
 486         int err;
 487
 488         rcu_read_lock();
 489
 490         spin_lock(&mlxsw_sp->ptp_state->unmatched_lock);
 491
 492         unmatched = mlxsw_sp1_ptp_unmatched_lookup(mlxsw_sp, key, &length);
 493         if (skb && unmatched && unmatched->timestamp) {
 494                 unmatched->skb = skb;
 495         } else if (timestamp && unmatched && unmatched->skb) {
 496                 unmatched->timestamp = timestamp;
 497         } else {
 498                 /* Either there is no entry to match, or one that is there is
 499                  * incompatible.
 500                  */
 501                 if (length < 100)
 502                         err = mlxsw_sp1_ptp_unmatched_save(mlxsw_sp, key,
 503                                                            skb, timestamp);
 504                 else
 505                         err = -E2BIG;
 506                 if (err && skb)
 507                         mlxsw_sp1_ptp_packet_finish(mlxsw_sp, skb,
 508                                                     key.local_port,
 509                                                     key.ingress, NULL);
 510                 unmatched = NULL;
 511         }
 512
 513         if (unmatched) {
 514                 err = mlxsw_sp1_ptp_unmatched_remove(mlxsw_sp, unmatched);
 515                 WARN_ON_ONCE(err);
 516         }
 517
 518         spin_unlock(&mlxsw_sp->ptp_state->unmatched_lock);
 519
 520         if (unmatched)
 521                 mlxsw_sp1_ptp_unmatched_finish(mlxsw_sp, unmatched);
 522
 523         rcu_read_unlock();
 524 }
 525
 526 static void mlxsw_sp1_ptp_got_packet(struct mlxsw_sp *mlxsw_sp,
 527                                      struct sk_buff *skb, u8 local_port,
 528                                      bool ingress)
 529 {
 530         struct mlxsw_sp_port *mlxsw_sp_port;
 531         struct mlxsw_sp1_ptp_key key;
 532         u8 types;
 533         int err;
 534
 535         mlxsw_sp_port = mlxsw_sp->ports[local_port];
 536         if (!mlxsw_sp_port)
 537                 goto immediate;
 538
 539         types = ingress ? mlxsw_sp_port->ptp.ing_types :
 540                           mlxsw_sp_port->ptp.egr_types;
 541         if (!types)
 542                 goto immediate;
 543
 544         memset(&key, 0, sizeof(key));
 545         key.local_port = local_port;
 546         key.ingress = ingress;
 547
 548         err = mlxsw_sp_ptp_parse(skb, &key.domain_number, &key.message_type,
 549                                  &key.sequence_id);
 550         if (err)
 551                 goto immediate;
 552
 553         /* For packets whose timestamping was not enabled on this port, don't
 554          * bother trying to match the timestamp.
 555          */
 556         if (!((1 << key.message_type) & types))
 557                 goto immediate;
 558
 559         mlxsw_sp1_ptp_got_piece(mlxsw_sp, key, skb, 0);
 560         return;
 561
 562 immediate:
 563         mlxsw_sp1_ptp_packet_finish(mlxsw_sp, skb, local_port, ingress, NULL);
 564 }
 565
 566 void mlxsw_sp1_ptp_got_timestamp(struct mlxsw_sp *mlxsw_sp, bool ingress,
 567                                  u8 local_port, u8 message_type,
 568                                  u8 domain_number, u16 sequence_id,
 569                                  u64 timestamp)
 570 {
 571         struct mlxsw_sp_port *mlxsw_sp_port;
 572         struct mlxsw_sp1_ptp_key key;
 573         u8 types;
 574
 575         mlxsw_sp_port = mlxsw_sp->ports[local_port];
 576         if (!mlxsw_sp_port)
 577                 return;
 578
 579         types = ingress ? mlxsw_sp_port->ptp.ing_types :
 580                           mlxsw_sp_port->ptp.egr_types;
 581
 582         /* For message types whose timestamping was not enabled on this port,
 583          * don't bother with the timestamp.
 584          */
 585         if (!((1 << message_type) & types))
 586                 return;
 587
 588         memset(&key, 0, sizeof(key));
 589         key.local_port = local_port;
 590         key.domain_number = domain_number;
 591         key.message_type = message_type;
 592         key.sequence_id = sequence_id;
 593         key.ingress = ingress;
 594
 595         mlxsw_sp1_ptp_got_piece(mlxsw_sp, key, NULL, timestamp);
 596 }
 597
 598 void mlxsw_sp1_ptp_receive(struct mlxsw_sp *mlxsw_sp, struct sk_buff *skb,
 599                            u8 local_port)
 600 {
 601         skb_reset_mac_header(skb);
 602         mlxsw_sp1_ptp_got_packet(mlxsw_sp, skb, local_port, true);
 603 }
 604
 605 void mlxsw_sp1_ptp_transmitted(struct mlxsw_sp *mlxsw_sp,
 606                                struct sk_buff *skb, u8 local_port)
 607 {
 608         mlxsw_sp1_ptp_got_packet(mlxsw_sp, skb, local_port, false);
 609 }
 610
 611 static void
 612 mlxsw_sp1_ptp_ht_gc_collect(struct mlxsw_sp_ptp_state *ptp_state,
 613                             struct mlxsw_sp1_ptp_unmatched *unmatched)
 614 {
 615         struct mlxsw_sp_ptp_port_dir_stats *stats;
 616         struct mlxsw_sp_port *mlxsw_sp_port;
 617         int err;
 618
 619         /* If an unmatched entry has an SKB, it has to be handed over to the
 620          * networking stack. This is usually done from a trap handler, which is
 621          * invoked in a softirq context. Here we are going to do it in process
 622          * context. If that were to be interrupted by a softirq, it could cause
 623          * a deadlock when an attempt is made to take an already-taken lock
 624          * somewhere along the sending path. Disable softirqs to prevent this.
 625          */
 626         local_bh_disable();
 627
 628         spin_lock(&ptp_state->unmatched_lock);
 629         err = rhltable_remove(&ptp_state->unmatched_ht, &unmatched->ht_node,
 630                               mlxsw_sp1_ptp_unmatched_ht_params);
 631         spin_unlock(&ptp_state->unmatched_lock);
 632
 633         if (err)
 634                 /* The packet was matched with timestamp during the walk. */
 635                 goto out;
 636
 637         mlxsw_sp_port = ptp_state->mlxsw_sp->ports[unmatched->key.local_port];
 638         if (mlxsw_sp_port) {
 639                 stats = unmatched->key.ingress ?
 640                         &mlxsw_sp_port->ptp.stats.rx_gcd :
 641                         &mlxsw_sp_port->ptp.stats.tx_gcd;
 642                 if (unmatched->skb)
 643                         stats->packets++;
 644                 else
 645                         stats->timestamps++;
 646         }
 647
 648         /* mlxsw_sp1_ptp_unmatched_finish() invokes netif_receive_skb(). While
 649          * the comment at that function states that it can only be called in
 650          * soft IRQ context, this pattern of local_bh_disable() +
 651          * netif_receive_skb(), in process context, is seen elsewhere in the
 652          * kernel, notably in pktgen.
 653          */
 654         mlxsw_sp1_ptp_unmatched_finish(ptp_state->mlxsw_sp, unmatched);
 655
 656 out:
 657         local_bh_enable();
 658 }
 659
 660 static void mlxsw_sp1_ptp_ht_gc(struct work_struct *work)
 661 {
 662         struct delayed_work *dwork = to_delayed_work(work);
 663         struct mlxsw_sp1_ptp_unmatched *unmatched;
 664         struct mlxsw_sp_ptp_state *ptp_state;
 665         struct rhashtable_iter iter;
 666         u32 gc_cycle;
 667         void *obj;
 668
 669         ptp_state = container_of(dwork, struct mlxsw_sp_ptp_state, ht_gc_dw);
 670         gc_cycle = ptp_state->gc_cycle++;
 671
 672         rhltable_walk_enter(&ptp_state->unmatched_ht, &iter);
 673         rhashtable_walk_start(&iter);
 674         while ((obj = rhashtable_walk_next(&iter))) {
 675                 if (IS_ERR(obj))
 676                         continue;
 677
 678                 unmatched = obj;
 679                 if (unmatched->gc_cycle <= gc_cycle)
 680                         mlxsw_sp1_ptp_ht_gc_collect(ptp_state, unmatched);
 681         }
 682         rhashtable_walk_stop(&iter);
 683         rhashtable_walk_exit(&iter);
 684
 685         mlxsw_core_schedule_dw(&ptp_state->ht_gc_dw,
 686                                MLXSW_SP1_PTP_HT_GC_INTERVAL);
 687 }
 688
 689 static int mlxsw_sp_ptp_mtptpt_set(struct mlxsw_sp *mlxsw_sp,
 690                                    enum mlxsw_reg_mtptpt_trap_id trap_id,
 691                                    u16 message_type)
 692 {
 693         char mtptpt_pl[MLXSW_REG_MTPTPT_LEN];
 694
 695         mlxsw_reg_mtptptp_pack(mtptpt_pl, trap_id, message_type);
 696         return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(mtptpt), mtptpt_pl);
 697 }
 698
 699 static int mlxsw_sp1_ptp_set_fifo_clr_on_trap(struct mlxsw_sp *mlxsw_sp,
 700                                               bool clr)
 701 {
 702         char mogcr_pl[MLXSW_REG_MOGCR_LEN] = {0};
 703         int err;
 704
 705         err = mlxsw_reg_query(mlxsw_sp->core, MLXSW_REG(mogcr), mogcr_pl);
 706         if (err)
 707                 return err;
 708
 709         mlxsw_reg_mogcr_ptp_iftc_set(mogcr_pl, clr);
 710         mlxsw_reg_mogcr_ptp_eftc_set(mogcr_pl, clr);
 711         return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(mogcr), mogcr_pl);
 712 }
 713
 714 static int mlxsw_sp1_ptp_mtpppc_set(struct mlxsw_sp *mlxsw_sp,
 715                                     u16 ing_types, u16 egr_types)
 716 {
 717         char mtpppc_pl[MLXSW_REG_MTPPPC_LEN];
 718
 719         mlxsw_reg_mtpppc_pack(mtpppc_pl, ing_types, egr_types);
 720         return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(mtpppc), mtpppc_pl);
 721 }
 722
 723 struct mlxsw_sp1_ptp_shaper_params {
 724         u32 ethtool_speed;
 725         enum mlxsw_reg_qpsc_port_speed port_speed;
 726         u8 shaper_time_exp;
 727         u8 shaper_time_mantissa;
 728         u8 shaper_inc;
 729         u8 shaper_bs;
 730         u8 port_to_shaper_credits;
 731         int ing_timestamp_inc;
 732         int egr_timestamp_inc;
 733 };
 734
 735 static const struct mlxsw_sp1_ptp_shaper_params
 736 mlxsw_sp1_ptp_shaper_params[] = {
 737         {
 738                 .ethtool_speed          = SPEED_100,
 739                 .port_speed             = MLXSW_REG_QPSC_PORT_SPEED_100M,
 740                 .shaper_time_exp        = 4,
 741                 .shaper_time_mantissa   = 12,
 742                 .shaper_inc             = 9,
 743                 .shaper_bs              = 1,
 744                 .port_to_shaper_credits = 1,
 745                 .ing_timestamp_inc      = -313,
 746                 .egr_timestamp_inc      = 313,
 747         },
 748         {
 749                 .ethtool_speed          = SPEED_1000,
 750                 .port_speed             = MLXSW_REG_QPSC_PORT_SPEED_1G,
 751                 .shaper_time_exp        = 0,
 752                 .shaper_time_mantissa   = 12,
 753                 .shaper_inc             = 6,
 754                 .shaper_bs              = 0,
 755                 .port_to_shaper_credits = 1,
 756                 .ing_timestamp_inc      = -35,
 757                 .egr_timestamp_inc      = 35,
 758         },
 759         {
 760                 .ethtool_speed          = SPEED_10000,
 761                 .port_speed             = MLXSW_REG_QPSC_PORT_SPEED_10G,
 762                 .shaper_time_exp        = 0,
 763                 .shaper_time_mantissa   = 2,
 764                 .shaper_inc             = 14,
 765                 .shaper_bs              = 1,
 766                 .port_to_shaper_credits = 1,
 767                 .ing_timestamp_inc      = -11,
 768                 .egr_timestamp_inc      = 11,
 769         },
 770         {
 771                 .ethtool_speed          = SPEED_25000,
 772                 .port_speed             = MLXSW_REG_QPSC_PORT_SPEED_25G,
 773                 .shaper_time_exp        = 0,
 774                 .shaper_time_mantissa   = 0,
 775                 .shaper_inc             = 11,
 776                 .shaper_bs              = 1,
 777                 .port_to_shaper_credits = 1,
 778                 .ing_timestamp_inc      = -14,
 779                 .egr_timestamp_inc      = 14,
 780         },
 781 };
 782
 783 #define MLXSW_SP1_PTP_SHAPER_PARAMS_LEN ARRAY_SIZE(mlxsw_sp1_ptp_shaper_params)
 784
 785 static int mlxsw_sp1_ptp_shaper_params_set(struct mlxsw_sp *mlxsw_sp)
 786 {
 787         const struct mlxsw_sp1_ptp_shaper_params *params;
 788         char qpsc_pl[MLXSW_REG_QPSC_LEN];
 789         int i, err;
 790
 791         for (i = 0; i < MLXSW_SP1_PTP_SHAPER_PARAMS_LEN; i++) {
 792                 params = &mlxsw_sp1_ptp_shaper_params[i];
 793                 mlxsw_reg_qpsc_pack(qpsc_pl, params->port_speed,
 794                                     params->shaper_time_exp,
 795                                     params->shaper_time_mantissa,
 796                                     params->shaper_inc, params->shaper_bs,
 797                                     params->port_to_shaper_credits,
 798                                     params->ing_timestamp_inc,
 799                                     params->egr_timestamp_inc);
 800                 err = mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(qpsc), qpsc_pl);
 801                 if (err)
 802                         return err;
 803         }
 804
 805         return 0;
 806 }
 807
 808 struct mlxsw_sp_ptp_state *mlxsw_sp1_ptp_init(struct mlxsw_sp *mlxsw_sp)
 809 {
 810         struct mlxsw_sp_ptp_state *ptp_state;
 811         u16 message_type;
 812         int err;
 813
 814         err = mlxsw_sp1_ptp_shaper_params_set(mlxsw_sp);
 815         if (err)
 816                 return ERR_PTR(err);
 817
 818         ptp_state = kzalloc(sizeof(*ptp_state), GFP_KERNEL);
 819         if (!ptp_state)
 820                 return ERR_PTR(-ENOMEM);
 821         ptp_state->mlxsw_sp = mlxsw_sp;
 822
 823         spin_lock_init(&ptp_state->unmatched_lock);
 824
 825         err = rhltable_init(&ptp_state->unmatched_ht,
 826                             &mlxsw_sp1_ptp_unmatched_ht_params);
 827         if (err)
 828                 goto err_hashtable_init;
 829
 830         /* Delive these message types as PTP0. */
 831         message_type = BIT(PTP_MSGTYPE_SYNC) |
 832                        BIT(PTP_MSGTYPE_DELAY_REQ) |
 833                        BIT(PTP_MSGTYPE_PDELAY_REQ) |
 834                        BIT(PTP_MSGTYPE_PDELAY_RESP);
 835         err = mlxsw_sp_ptp_mtptpt_set(mlxsw_sp, MLXSW_REG_MTPTPT_TRAP_ID_PTP0,
 836                                       message_type);
 837         if (err)
 838                 goto err_mtptpt_set;
 839
 840         /* Everything else is PTP1. */
 841         message_type = ~message_type;
 842         err = mlxsw_sp_ptp_mtptpt_set(mlxsw_sp, MLXSW_REG_MTPTPT_TRAP_ID_PTP1,
 843                                       message_type);
 844         if (err)
 845                 goto err_mtptpt1_set;
 846
 847         err = mlxsw_sp1_ptp_set_fifo_clr_on_trap(mlxsw_sp, true);
 848         if (err)
 849                 goto err_fifo_clr;
 850
 851         INIT_DELAYED_WORK(&ptp_state->ht_gc_dw, mlxsw_sp1_ptp_ht_gc);
 852         mlxsw_core_schedule_dw(&ptp_state->ht_gc_dw,
 853                                MLXSW_SP1_PTP_HT_GC_INTERVAL);
 854         return ptp_state;
 855
 856 err_fifo_clr:
 857         mlxsw_sp_ptp_mtptpt_set(mlxsw_sp, MLXSW_REG_MTPTPT_TRAP_ID_PTP1, 0);
 858 err_mtptpt1_set:
 859         mlxsw_sp_ptp_mtptpt_set(mlxsw_sp, MLXSW_REG_MTPTPT_TRAP_ID_PTP0, 0);
 860 err_mtptpt_set:
 861         rhltable_destroy(&ptp_state->unmatched_ht);
 862 err_hashtable_init:
 863         kfree(ptp_state);
 864         return ERR_PTR(err);
 865 }
 866
 867 void mlxsw_sp1_ptp_fini(struct mlxsw_sp_ptp_state *ptp_state)
 868 {
 869         struct mlxsw_sp *mlxsw_sp = ptp_state->mlxsw_sp;
 870
 871         cancel_delayed_work_sync(&ptp_state->ht_gc_dw);
 872         mlxsw_sp1_ptp_mtpppc_set(mlxsw_sp, 0, 0);
 873         mlxsw_sp1_ptp_set_fifo_clr_on_trap(mlxsw_sp, false);
 874         mlxsw_sp_ptp_mtptpt_set(mlxsw_sp, MLXSW_REG_MTPTPT_TRAP_ID_PTP1, 0);
 875         mlxsw_sp_ptp_mtptpt_set(mlxsw_sp, MLXSW_REG_MTPTPT_TRAP_ID_PTP0, 0);
 876         rhltable_free_and_destroy(&ptp_state->unmatched_ht,
 877                                   &mlxsw_sp1_ptp_unmatched_free_fn, NULL);
 878         kfree(ptp_state);
 879 }
 880
 881 int mlxsw_sp1_ptp_hwtstamp_get(struct mlxsw_sp_port *mlxsw_sp_port,
 882                                struct hwtstamp_config *config)
 883 {
 884         *config = mlxsw_sp_port->ptp.hwtstamp_config;
 885         return 0;
 886 }
 887
 888 static int mlxsw_sp_ptp_get_message_types(const struct hwtstamp_config *config,
 889                                           u16 *p_ing_types, u16 *p_egr_types,
 890                                           enum hwtstamp_rx_filters *p_rx_filter)
 891 {
 892         enum hwtstamp_rx_filters rx_filter = config->rx_filter;
 893         enum hwtstamp_tx_types tx_type = config->tx_type;
 894         u16 ing_types = 0x00;
 895         u16 egr_types = 0x00;
 896
 897         switch (tx_type) {
 898         case HWTSTAMP_TX_OFF:
 899                 egr_types = 0x00;
 900                 break;
 901         case HWTSTAMP_TX_ON:
 902                 egr_types = 0xff;
 903                 break;
 904         case HWTSTAMP_TX_ONESTEP_SYNC:
 905         case HWTSTAMP_TX_ONESTEP_P2P:
 906                 return -ERANGE;
 907         default:
 908                 return -EINVAL;
 909         }
 910
 911         switch (rx_filter) {
 912         case HWTSTAMP_FILTER_NONE:
 913                 ing_types = 0x00;
 914                 break;
 915         case HWTSTAMP_FILTER_PTP_V1_L4_SYNC:
 916         case HWTSTAMP_FILTER_PTP_V2_L4_SYNC:
 917         case HWTSTAMP_FILTER_PTP_V2_L2_SYNC:
 918         case HWTSTAMP_FILTER_PTP_V2_SYNC:
 919                 ing_types = 0x01;
 920                 break;
 921         case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ:
 922         case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ:
 923         case HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ:
 924         case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ:
 925                 ing_types = 0x02;
 926                 break;
 927         case HWTSTAMP_FILTER_PTP_V1_L4_EVENT:
 928         case HWTSTAMP_FILTER_PTP_V2_L4_EVENT:
 929         case HWTSTAMP_FILTER_PTP_V2_L2_EVENT:
 930         case HWTSTAMP_FILTER_PTP_V2_EVENT:
 931                 ing_types = 0x0f;
 932                 break;
 933         case HWTSTAMP_FILTER_ALL:
 934                 ing_types = 0xff;
 935                 break;
 936         case HWTSTAMP_FILTER_SOME:
 937         case HWTSTAMP_FILTER_NTP_ALL:
 938                 return -ERANGE;
 939         default:
 940                 return -EINVAL;
 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         bool ptps = false;
1006         int err, i;
1007         u32 speed;
1008
1009         if (!mlxsw_sp1_ptp_hwtstamp_enabled(mlxsw_sp_port))
1010                 return mlxsw_sp1_ptp_port_shaper_set(mlxsw_sp_port, false);
1011
1012         err = mlxsw_sp_port_speed_get(mlxsw_sp_port, &speed);
1013         if (err)
1014                 return err;
1015
1016         for (i = 0; i < MLXSW_SP1_PTP_SHAPER_PARAMS_LEN; i++) {
1017                 if (mlxsw_sp1_ptp_shaper_params[i].ethtool_speed == speed) {
1018                         ptps = true;
1019                         break;
1020                 }
1021         }
1022
1023         return mlxsw_sp1_ptp_port_shaper_set(mlxsw_sp_port, ptps);
1024 }
1025
1026 void mlxsw_sp1_ptp_shaper_work(struct work_struct *work)
1027 {
1028         struct delayed_work *dwork = to_delayed_work(work);
1029         struct mlxsw_sp_port *mlxsw_sp_port;
1030         int err;
1031
1032         mlxsw_sp_port = container_of(dwork, struct mlxsw_sp_port,
1033                                      ptp.shaper_dw);
1034
1035         if (!mlxsw_sp1_ptp_hwtstamp_enabled(mlxsw_sp_port))
1036                 return;
1037
1038         err = mlxsw_sp1_ptp_port_shaper_check(mlxsw_sp_port);
1039         if (err)
1040                 netdev_err(mlxsw_sp_port->dev, "Failed to set up PTP shaper\n");
1041 }
1042
1043 int mlxsw_sp1_ptp_hwtstamp_set(struct mlxsw_sp_port *mlxsw_sp_port,
1044                                struct hwtstamp_config *config)
1045 {
1046         enum hwtstamp_rx_filters rx_filter;
1047         u16 ing_types;
1048         u16 egr_types;
1049         int err;
1050
1051         err = mlxsw_sp_ptp_get_message_types(config, &ing_types, &egr_types,
1052                                              &rx_filter);
1053         if (err)
1054                 return err;
1055
1056         err = mlxsw_sp1_ptp_mtpppc_update(mlxsw_sp_port, ing_types, egr_types);
1057         if (err)
1058                 return err;
1059
1060         mlxsw_sp_port->ptp.hwtstamp_config = *config;
1061         mlxsw_sp_port->ptp.ing_types = ing_types;
1062         mlxsw_sp_port->ptp.egr_types = egr_types;
1063
1064         err = mlxsw_sp1_ptp_port_shaper_check(mlxsw_sp_port);
1065         if (err)
1066                 return err;
1067
1068         /* Notify the ioctl caller what we are actually timestamping. */
1069         config->rx_filter = rx_filter;
1070
1071         return 0;
1072 }
1073
1074 int mlxsw_sp1_ptp_get_ts_info(struct mlxsw_sp *mlxsw_sp,
1075                               struct ethtool_ts_info *info)
1076 {
1077         info->phc_index = ptp_clock_index(mlxsw_sp->clock->ptp);
1078
1079         info->so_timestamping = SOF_TIMESTAMPING_TX_HARDWARE |
1080                                 SOF_TIMESTAMPING_RX_HARDWARE |
1081                                 SOF_TIMESTAMPING_RAW_HARDWARE;
1082
1083         info->tx_types = BIT(HWTSTAMP_TX_OFF) |
1084                          BIT(HWTSTAMP_TX_ON);
1085
1086         info->rx_filters = BIT(HWTSTAMP_FILTER_NONE) |
1087                            BIT(HWTSTAMP_FILTER_ALL);
1088
1089         return 0;
1090 }
1091
1092 struct mlxsw_sp_ptp_port_stat {
1093         char str[ETH_GSTRING_LEN];
1094         ptrdiff_t offset;
1095 };
1096
1097 #define MLXSW_SP_PTP_PORT_STAT(NAME, FIELD)                             \
1098         {                                                               \
1099                 .str = NAME,                                            \
1100                 .offset = offsetof(struct mlxsw_sp_ptp_port_stats,      \
1101                                     FIELD),                             \
1102         }
1103
1104 static const struct mlxsw_sp_ptp_port_stat mlxsw_sp_ptp_port_stats[] = {
1105         MLXSW_SP_PTP_PORT_STAT("ptp_rx_gcd_packets",    rx_gcd.packets),
1106         MLXSW_SP_PTP_PORT_STAT("ptp_rx_gcd_timestamps", rx_gcd.timestamps),
1107         MLXSW_SP_PTP_PORT_STAT("ptp_tx_gcd_packets",    tx_gcd.packets),
1108         MLXSW_SP_PTP_PORT_STAT("ptp_tx_gcd_timestamps", tx_gcd.timestamps),
1109 };
1110
1111 #undef MLXSW_SP_PTP_PORT_STAT
1112
1113 #define MLXSW_SP_PTP_PORT_STATS_LEN \
1114         ARRAY_SIZE(mlxsw_sp_ptp_port_stats)
1115
1116 int mlxsw_sp1_get_stats_count(void)
1117 {
1118         return MLXSW_SP_PTP_PORT_STATS_LEN;
1119 }
1120
1121 void mlxsw_sp1_get_stats_strings(u8 **p)
1122 {
1123         int i;
1124
1125         for (i = 0; i < MLXSW_SP_PTP_PORT_STATS_LEN; i++) {
1126                 memcpy(*p, mlxsw_sp_ptp_port_stats[i].str,
1127                        ETH_GSTRING_LEN);
1128                 *p += ETH_GSTRING_LEN;
1129         }
1130 }
1131
1132 void mlxsw_sp1_get_stats(struct mlxsw_sp_port *mlxsw_sp_port,
1133                          u64 *data, int data_index)
1134 {
1135         void *stats = &mlxsw_sp_port->ptp.stats;
1136         ptrdiff_t offset;
1137         int i;
1138
1139         data += data_index;
1140         for (i = 0; i < MLXSW_SP_PTP_PORT_STATS_LEN; i++) {
1141                 offset = mlxsw_sp_ptp_port_stats[i].offset;
1142                 *data++ = *(u64 *)(stats + offset);
1143         }
1144 }