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         unsigned int max_ports = mlxsw_core_max_ports(mlxsw_sp->core);
 572         struct mlxsw_sp_port *mlxsw_sp_port;
 573         struct mlxsw_sp1_ptp_key key;
 574         u8 types;
 575
 576         if (WARN_ON_ONCE(local_port >= max_ports))
 577                 return;
 578         mlxsw_sp_port = mlxsw_sp->ports[local_port];
 579         if (!mlxsw_sp_port)
 580                 return;
 581
 582         types = ingress ? mlxsw_sp_port->ptp.ing_types :
 583                           mlxsw_sp_port->ptp.egr_types;
 584
 585         /* For message types whose timestamping was not enabled on this port,
 586          * don't bother with the timestamp.
 587          */
 588         if (!((1 << message_type) & types))
 589                 return;
 590
 591         memset(&key, 0, sizeof(key));
 592         key.local_port = local_port;
 593         key.domain_number = domain_number;
 594         key.message_type = message_type;
 595         key.sequence_id = sequence_id;
 596         key.ingress = ingress;
 597
 598         mlxsw_sp1_ptp_got_piece(mlxsw_sp, key, NULL, timestamp);
 599 }
 600
 601 void mlxsw_sp1_ptp_receive(struct mlxsw_sp *mlxsw_sp, struct sk_buff *skb,
 602                            u8 local_port)
 603 {
 604         skb_reset_mac_header(skb);
 605         mlxsw_sp1_ptp_got_packet(mlxsw_sp, skb, local_port, true);
 606 }
 607
 608 void mlxsw_sp1_ptp_transmitted(struct mlxsw_sp *mlxsw_sp,
 609                                struct sk_buff *skb, u8 local_port)
 610 {
 611         mlxsw_sp1_ptp_got_packet(mlxsw_sp, skb, local_port, false);
 612 }
 613
 614 static void
 615 mlxsw_sp1_ptp_ht_gc_collect(struct mlxsw_sp_ptp_state *ptp_state,
 616                             struct mlxsw_sp1_ptp_unmatched *unmatched)
 617 {
 618         struct mlxsw_sp_ptp_port_dir_stats *stats;
 619         struct mlxsw_sp_port *mlxsw_sp_port;
 620         int err;
 621
 622         /* If an unmatched entry has an SKB, it has to be handed over to the
 623          * networking stack. This is usually done from a trap handler, which is
 624          * invoked in a softirq context. Here we are going to do it in process
 625          * context. If that were to be interrupted by a softirq, it could cause
 626          * a deadlock when an attempt is made to take an already-taken lock
 627          * somewhere along the sending path. Disable softirqs to prevent this.
 628          */
 629         local_bh_disable();
 630
 631         spin_lock(&ptp_state->unmatched_lock);
 632         err = rhltable_remove(&ptp_state->unmatched_ht, &unmatched->ht_node,
 633                               mlxsw_sp1_ptp_unmatched_ht_params);
 634         spin_unlock(&ptp_state->unmatched_lock);
 635
 636         if (err)
 637                 /* The packet was matched with timestamp during the walk. */
 638                 goto out;
 639
 640         mlxsw_sp_port = ptp_state->mlxsw_sp->ports[unmatched->key.local_port];
 641         if (mlxsw_sp_port) {
 642                 stats = unmatched->key.ingress ?
 643                         &mlxsw_sp_port->ptp.stats.rx_gcd :
 644                         &mlxsw_sp_port->ptp.stats.tx_gcd;
 645                 if (unmatched->skb)
 646                         stats->packets++;
 647                 else
 648                         stats->timestamps++;
 649         }
 650
 651         /* mlxsw_sp1_ptp_unmatched_finish() invokes netif_receive_skb(). While
 652          * the comment at that function states that it can only be called in
 653          * soft IRQ context, this pattern of local_bh_disable() +
 654          * netif_receive_skb(), in process context, is seen elsewhere in the
 655          * kernel, notably in pktgen.
 656          */
 657         mlxsw_sp1_ptp_unmatched_finish(ptp_state->mlxsw_sp, unmatched);
 658
 659 out:
 660         local_bh_enable();
 661 }
 662
 663 static void mlxsw_sp1_ptp_ht_gc(struct work_struct *work)
 664 {
 665         struct delayed_work *dwork = to_delayed_work(work);
 666         struct mlxsw_sp1_ptp_unmatched *unmatched;
 667         struct mlxsw_sp_ptp_state *ptp_state;
 668         struct rhashtable_iter iter;
 669         u32 gc_cycle;
 670         void *obj;
 671
 672         ptp_state = container_of(dwork, struct mlxsw_sp_ptp_state, ht_gc_dw);
 673         gc_cycle = ptp_state->gc_cycle++;
 674
 675         rhltable_walk_enter(&ptp_state->unmatched_ht, &iter);
 676         rhashtable_walk_start(&iter);
 677         while ((obj = rhashtable_walk_next(&iter))) {
 678                 if (IS_ERR(obj))
 679                         continue;
 680
 681                 unmatched = obj;
 682                 if (unmatched->gc_cycle <= gc_cycle)
 683                         mlxsw_sp1_ptp_ht_gc_collect(ptp_state, unmatched);
 684         }
 685         rhashtable_walk_stop(&iter);
 686         rhashtable_walk_exit(&iter);
 687
 688         mlxsw_core_schedule_dw(&ptp_state->ht_gc_dw,
 689                                MLXSW_SP1_PTP_HT_GC_INTERVAL);
 690 }
 691
 692 static int mlxsw_sp_ptp_mtptpt_set(struct mlxsw_sp *mlxsw_sp,
 693                                    enum mlxsw_reg_mtptpt_trap_id trap_id,
 694                                    u16 message_type)
 695 {
 696         char mtptpt_pl[MLXSW_REG_MTPTPT_LEN];
 697
 698         mlxsw_reg_mtptptp_pack(mtptpt_pl, trap_id, message_type);
 699         return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(mtptpt), mtptpt_pl);
 700 }
 701
 702 static int mlxsw_sp1_ptp_set_fifo_clr_on_trap(struct mlxsw_sp *mlxsw_sp,
 703                                               bool clr)
 704 {
 705         char mogcr_pl[MLXSW_REG_MOGCR_LEN] = {0};
 706         int err;
 707
 708         err = mlxsw_reg_query(mlxsw_sp->core, MLXSW_REG(mogcr), mogcr_pl);
 709         if (err)
 710                 return err;
 711
 712         mlxsw_reg_mogcr_ptp_iftc_set(mogcr_pl, clr);
 713         mlxsw_reg_mogcr_ptp_eftc_set(mogcr_pl, clr);
 714         return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(mogcr), mogcr_pl);
 715 }
 716
 717 static int mlxsw_sp1_ptp_mtpppc_set(struct mlxsw_sp *mlxsw_sp,
 718                                     u16 ing_types, u16 egr_types)
 719 {
 720         char mtpppc_pl[MLXSW_REG_MTPPPC_LEN];
 721
 722         mlxsw_reg_mtpppc_pack(mtpppc_pl, ing_types, egr_types);
 723         return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(mtpppc), mtpppc_pl);
 724 }
 725
 726 struct mlxsw_sp1_ptp_shaper_params {
 727         u32 ethtool_speed;
 728         enum mlxsw_reg_qpsc_port_speed port_speed;
 729         u8 shaper_time_exp;
 730         u8 shaper_time_mantissa;
 731         u8 shaper_inc;
 732         u8 shaper_bs;
 733         u8 port_to_shaper_credits;
 734         int ing_timestamp_inc;
 735         int egr_timestamp_inc;
 736 };
 737
 738 static const struct mlxsw_sp1_ptp_shaper_params
 739 mlxsw_sp1_ptp_shaper_params[] = {
 740         {
 741                 .ethtool_speed          = SPEED_100,
 742                 .port_speed             = MLXSW_REG_QPSC_PORT_SPEED_100M,
 743                 .shaper_time_exp        = 4,
 744                 .shaper_time_mantissa   = 12,
 745                 .shaper_inc             = 9,
 746                 .shaper_bs              = 1,
 747                 .port_to_shaper_credits = 1,
 748                 .ing_timestamp_inc      = -313,
 749                 .egr_timestamp_inc      = 313,
 750         },
 751         {
 752                 .ethtool_speed          = SPEED_1000,
 753                 .port_speed             = MLXSW_REG_QPSC_PORT_SPEED_1G,
 754                 .shaper_time_exp        = 0,
 755                 .shaper_time_mantissa   = 12,
 756                 .shaper_inc             = 6,
 757                 .shaper_bs              = 0,
 758                 .port_to_shaper_credits = 1,
 759                 .ing_timestamp_inc      = -35,
 760                 .egr_timestamp_inc      = 35,
 761         },
 762         {
 763                 .ethtool_speed          = SPEED_10000,
 764                 .port_speed             = MLXSW_REG_QPSC_PORT_SPEED_10G,
 765                 .shaper_time_exp        = 0,
 766                 .shaper_time_mantissa   = 2,
 767                 .shaper_inc             = 14,
 768                 .shaper_bs              = 1,
 769                 .port_to_shaper_credits = 1,
 770                 .ing_timestamp_inc      = -11,
 771                 .egr_timestamp_inc      = 11,
 772         },
 773         {
 774                 .ethtool_speed          = SPEED_25000,
 775                 .port_speed             = MLXSW_REG_QPSC_PORT_SPEED_25G,
 776                 .shaper_time_exp        = 0,
 777                 .shaper_time_mantissa   = 0,
 778                 .shaper_inc             = 11,
 779                 .shaper_bs              = 1,
 780                 .port_to_shaper_credits = 1,
 781                 .ing_timestamp_inc      = -14,
 782                 .egr_timestamp_inc      = 14,
 783         },
 784 };
 785
 786 #define MLXSW_SP1_PTP_SHAPER_PARAMS_LEN ARRAY_SIZE(mlxsw_sp1_ptp_shaper_params)
 787
 788 static int mlxsw_sp1_ptp_shaper_params_set(struct mlxsw_sp *mlxsw_sp)
 789 {
 790         const struct mlxsw_sp1_ptp_shaper_params *params;
 791         char qpsc_pl[MLXSW_REG_QPSC_LEN];
 792         int i, err;
 793
 794         for (i = 0; i < MLXSW_SP1_PTP_SHAPER_PARAMS_LEN; i++) {
 795                 params = &mlxsw_sp1_ptp_shaper_params[i];
 796                 mlxsw_reg_qpsc_pack(qpsc_pl, params->port_speed,
 797                                     params->shaper_time_exp,
 798                                     params->shaper_time_mantissa,
 799                                     params->shaper_inc, params->shaper_bs,
 800                                     params->port_to_shaper_credits,
 801                                     params->ing_timestamp_inc,
 802                                     params->egr_timestamp_inc);
 803                 err = mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(qpsc), qpsc_pl);
 804                 if (err)
 805                         return err;
 806         }
 807
 808         return 0;
 809 }
 810
 811 struct mlxsw_sp_ptp_state *mlxsw_sp1_ptp_init(struct mlxsw_sp *mlxsw_sp)
 812 {
 813         struct mlxsw_sp_ptp_state *ptp_state;
 814         u16 message_type;
 815         int err;
 816
 817         err = mlxsw_sp1_ptp_shaper_params_set(mlxsw_sp);
 818         if (err)
 819                 return ERR_PTR(err);
 820
 821         ptp_state = kzalloc(sizeof(*ptp_state), GFP_KERNEL);
 822         if (!ptp_state)
 823                 return ERR_PTR(-ENOMEM);
 824         ptp_state->mlxsw_sp = mlxsw_sp;
 825
 826         spin_lock_init(&ptp_state->unmatched_lock);
 827
 828         err = rhltable_init(&ptp_state->unmatched_ht,
 829                             &mlxsw_sp1_ptp_unmatched_ht_params);
 830         if (err)
 831                 goto err_hashtable_init;
 832
 833         /* Delive these message types as PTP0. */
 834         message_type = BIT(PTP_MSGTYPE_SYNC) |
 835                        BIT(PTP_MSGTYPE_DELAY_REQ) |
 836                        BIT(PTP_MSGTYPE_PDELAY_REQ) |
 837                        BIT(PTP_MSGTYPE_PDELAY_RESP);
 838         err = mlxsw_sp_ptp_mtptpt_set(mlxsw_sp, MLXSW_REG_MTPTPT_TRAP_ID_PTP0,
 839                                       message_type);
 840         if (err)
 841                 goto err_mtptpt_set;
 842
 843         /* Everything else is PTP1. */
 844         message_type = ~message_type;
 845         err = mlxsw_sp_ptp_mtptpt_set(mlxsw_sp, MLXSW_REG_MTPTPT_TRAP_ID_PTP1,
 846                                       message_type);
 847         if (err)
 848                 goto err_mtptpt1_set;
 849
 850         err = mlxsw_sp1_ptp_set_fifo_clr_on_trap(mlxsw_sp, true);
 851         if (err)
 852                 goto err_fifo_clr;
 853
 854         INIT_DELAYED_WORK(&ptp_state->ht_gc_dw, mlxsw_sp1_ptp_ht_gc);
 855         mlxsw_core_schedule_dw(&ptp_state->ht_gc_dw,
 856                                MLXSW_SP1_PTP_HT_GC_INTERVAL);
 857         return ptp_state;
 858
 859 err_fifo_clr:
 860         mlxsw_sp_ptp_mtptpt_set(mlxsw_sp, MLXSW_REG_MTPTPT_TRAP_ID_PTP1, 0);
 861 err_mtptpt1_set:
 862         mlxsw_sp_ptp_mtptpt_set(mlxsw_sp, MLXSW_REG_MTPTPT_TRAP_ID_PTP0, 0);
 863 err_mtptpt_set:
 864         rhltable_destroy(&ptp_state->unmatched_ht);
 865 err_hashtable_init:
 866         kfree(ptp_state);
 867         return ERR_PTR(err);
 868 }
 869
 870 void mlxsw_sp1_ptp_fini(struct mlxsw_sp_ptp_state *ptp_state)
 871 {
 872         struct mlxsw_sp *mlxsw_sp = ptp_state->mlxsw_sp;
 873
 874         cancel_delayed_work_sync(&ptp_state->ht_gc_dw);
 875         mlxsw_sp1_ptp_mtpppc_set(mlxsw_sp, 0, 0);
 876         mlxsw_sp1_ptp_set_fifo_clr_on_trap(mlxsw_sp, false);
 877         mlxsw_sp_ptp_mtptpt_set(mlxsw_sp, MLXSW_REG_MTPTPT_TRAP_ID_PTP1, 0);
 878         mlxsw_sp_ptp_mtptpt_set(mlxsw_sp, MLXSW_REG_MTPTPT_TRAP_ID_PTP0, 0);
 879         rhltable_free_and_destroy(&ptp_state->unmatched_ht,
 880                                   &mlxsw_sp1_ptp_unmatched_free_fn, NULL);
 881         kfree(ptp_state);
 882 }
 883
 884 int mlxsw_sp1_ptp_hwtstamp_get(struct mlxsw_sp_port *mlxsw_sp_port,
 885                                struct hwtstamp_config *config)
 886 {
 887         *config = mlxsw_sp_port->ptp.hwtstamp_config;
 888         return 0;
 889 }
 890
 891 static int mlxsw_sp_ptp_get_message_types(const struct hwtstamp_config *config,
 892                                           u16 *p_ing_types, u16 *p_egr_types,
 893                                           enum hwtstamp_rx_filters *p_rx_filter)
 894 {
 895         enum hwtstamp_rx_filters rx_filter = config->rx_filter;
 896         enum hwtstamp_tx_types tx_type = config->tx_type;
 897         u16 ing_types = 0x00;
 898         u16 egr_types = 0x00;
 899
 900         switch (tx_type) {
 901         case HWTSTAMP_TX_OFF:
 902                 egr_types = 0x00;
 903                 break;
 904         case HWTSTAMP_TX_ON:
 905                 egr_types = 0xff;
 906                 break;
 907         case HWTSTAMP_TX_ONESTEP_SYNC:
 908         case HWTSTAMP_TX_ONESTEP_P2P:
 909                 return -ERANGE;
 910         default:
 911                 return -EINVAL;
 912         }
 913
 914         switch (rx_filter) {
 915         case HWTSTAMP_FILTER_NONE:
 916                 ing_types = 0x00;
 917                 break;
 918         case HWTSTAMP_FILTER_PTP_V1_L4_SYNC:
 919         case HWTSTAMP_FILTER_PTP_V2_L4_SYNC:
 920         case HWTSTAMP_FILTER_PTP_V2_L2_SYNC:
 921         case HWTSTAMP_FILTER_PTP_V2_SYNC:
 922                 ing_types = 0x01;
 923                 break;
 924         case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ:
 925         case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ:
 926         case HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ:
 927         case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ:
 928                 ing_types = 0x02;
 929                 break;
 930         case HWTSTAMP_FILTER_PTP_V1_L4_EVENT:
 931         case HWTSTAMP_FILTER_PTP_V2_L4_EVENT:
 932         case HWTSTAMP_FILTER_PTP_V2_L2_EVENT:
 933         case HWTSTAMP_FILTER_PTP_V2_EVENT:
 934                 ing_types = 0x0f;
 935                 break;
 936         case HWTSTAMP_FILTER_ALL:
 937                 ing_types = 0xff;
 938                 break;
 939         case HWTSTAMP_FILTER_SOME:
 940         case HWTSTAMP_FILTER_NTP_ALL:
 941                 return -ERANGE;
 942         default:
 943                 return -EINVAL;
 944         }
 945
 946         *p_ing_types = ing_types;
 947         *p_egr_types = egr_types;
 948         *p_rx_filter = rx_filter;
 949         return 0;
 950 }
 951
 952 static int mlxsw_sp1_ptp_mtpppc_update(struct mlxsw_sp_port *mlxsw_sp_port,
 953                                        u16 ing_types, u16 egr_types)
 954 {
 955         struct mlxsw_sp *mlxsw_sp = mlxsw_sp_port->mlxsw_sp;
 956         struct mlxsw_sp_port *tmp;
 957         u16 orig_ing_types = 0;
 958         u16 orig_egr_types = 0;
 959         int err;
 960         int i;
 961
 962         /* MTPPPC configures timestamping globally, not per port. Find the
 963          * configuration that contains all configured timestamping requests.
 964          */
 965         for (i = 1; i < mlxsw_core_max_ports(mlxsw_sp->core); i++) {
 966                 tmp = mlxsw_sp->ports[i];
 967                 if (tmp) {
 968                         orig_ing_types |= tmp->ptp.ing_types;
 969                         orig_egr_types |= tmp->ptp.egr_types;
 970                 }
 971                 if (tmp && tmp != mlxsw_sp_port) {
 972                         ing_types |= tmp->ptp.ing_types;
 973                         egr_types |= tmp->ptp.egr_types;
 974                 }
 975         }
 976
 977         if ((ing_types || egr_types) && !(orig_ing_types || orig_egr_types)) {
 978                 err = mlxsw_sp_parsing_depth_inc(mlxsw_sp);
 979                 if (err) {
 980                         netdev_err(mlxsw_sp_port->dev, "Failed to increase parsing depth");
 981                         return err;
 982                 }
 983         }
 984         if (!(ing_types || egr_types) && (orig_ing_types || orig_egr_types))
 985                 mlxsw_sp_parsing_depth_dec(mlxsw_sp);
 986
 987         return mlxsw_sp1_ptp_mtpppc_set(mlxsw_sp_port->mlxsw_sp,
 988                                        ing_types, egr_types);
 989 }
 990
 991 static bool mlxsw_sp1_ptp_hwtstamp_enabled(struct mlxsw_sp_port *mlxsw_sp_port)
 992 {
 993         return mlxsw_sp_port->ptp.ing_types || mlxsw_sp_port->ptp.egr_types;
 994 }
 995
 996 static int
 997 mlxsw_sp1_ptp_port_shaper_set(struct mlxsw_sp_port *mlxsw_sp_port, bool enable)
 998 {
 999         struct mlxsw_sp *mlxsw_sp = mlxsw_sp_port->mlxsw_sp;
1000         char qeec_pl[MLXSW_REG_QEEC_LEN];
1001
1002         mlxsw_reg_qeec_ptps_pack(qeec_pl, mlxsw_sp_port->local_port, enable);
1003         return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(qeec), qeec_pl);
1004 }
1005
1006 static int mlxsw_sp1_ptp_port_shaper_check(struct mlxsw_sp_port *mlxsw_sp_port)
1007 {
1008         bool ptps = false;
1009         int err, i;
1010         u32 speed;
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         err = mlxsw_sp_port_speed_get(mlxsw_sp_port, &speed);
1016         if (err)
1017                 return err;
1018
1019         for (i = 0; i < MLXSW_SP1_PTP_SHAPER_PARAMS_LEN; i++) {
1020                 if (mlxsw_sp1_ptp_shaper_params[i].ethtool_speed == speed) {
1021                         ptps = true;
1022                         break;
1023                 }
1024         }
1025
1026         return mlxsw_sp1_ptp_port_shaper_set(mlxsw_sp_port, ptps);
1027 }
1028
1029 void mlxsw_sp1_ptp_shaper_work(struct work_struct *work)
1030 {
1031         struct delayed_work *dwork = to_delayed_work(work);
1032         struct mlxsw_sp_port *mlxsw_sp_port;
1033         int err;
1034
1035         mlxsw_sp_port = container_of(dwork, struct mlxsw_sp_port,
1036                                      ptp.shaper_dw);
1037
1038         if (!mlxsw_sp1_ptp_hwtstamp_enabled(mlxsw_sp_port))
1039                 return;
1040
1041         err = mlxsw_sp1_ptp_port_shaper_check(mlxsw_sp_port);
1042         if (err)
1043                 netdev_err(mlxsw_sp_port->dev, "Failed to set up PTP shaper\n");
1044 }
1045
1046 int mlxsw_sp1_ptp_hwtstamp_set(struct mlxsw_sp_port *mlxsw_sp_port,
1047                                struct hwtstamp_config *config)
1048 {
1049         enum hwtstamp_rx_filters rx_filter;
1050         u16 ing_types;
1051         u16 egr_types;
1052         int err;
1053
1054         err = mlxsw_sp_ptp_get_message_types(config, &ing_types, &egr_types,
1055                                              &rx_filter);
1056         if (err)
1057                 return err;
1058
1059         err = mlxsw_sp1_ptp_mtpppc_update(mlxsw_sp_port, ing_types, egr_types);
1060         if (err)
1061                 return err;
1062
1063         mlxsw_sp_port->ptp.hwtstamp_config = *config;
1064         mlxsw_sp_port->ptp.ing_types = ing_types;
1065         mlxsw_sp_port->ptp.egr_types = egr_types;
1066
1067         err = mlxsw_sp1_ptp_port_shaper_check(mlxsw_sp_port);
1068         if (err)
1069                 return err;
1070
1071         /* Notify the ioctl caller what we are actually timestamping. */
1072         config->rx_filter = rx_filter;
1073
1074         return 0;
1075 }
1076
1077 int mlxsw_sp1_ptp_get_ts_info(struct mlxsw_sp *mlxsw_sp,
1078                               struct ethtool_ts_info *info)
1079 {
1080         info->phc_index = ptp_clock_index(mlxsw_sp->clock->ptp);
1081
1082         info->so_timestamping = SOF_TIMESTAMPING_TX_HARDWARE |
1083                                 SOF_TIMESTAMPING_RX_HARDWARE |
1084                                 SOF_TIMESTAMPING_RAW_HARDWARE;
1085
1086         info->tx_types = BIT(HWTSTAMP_TX_OFF) |
1087                          BIT(HWTSTAMP_TX_ON);
1088
1089         info->rx_filters = BIT(HWTSTAMP_FILTER_NONE) |
1090                            BIT(HWTSTAMP_FILTER_ALL);
1091
1092         return 0;
1093 }
1094
1095 struct mlxsw_sp_ptp_port_stat {
1096         char str[ETH_GSTRING_LEN];
1097         ptrdiff_t offset;
1098 };
1099
1100 #define MLXSW_SP_PTP_PORT_STAT(NAME, FIELD)                             \
1101         {                                                               \
1102                 .str = NAME,                                            \
1103                 .offset = offsetof(struct mlxsw_sp_ptp_port_stats,      \
1104                                     FIELD),                             \
1105         }
1106
1107 static const struct mlxsw_sp_ptp_port_stat mlxsw_sp_ptp_port_stats[] = {
1108         MLXSW_SP_PTP_PORT_STAT("ptp_rx_gcd_packets",    rx_gcd.packets),
1109         MLXSW_SP_PTP_PORT_STAT("ptp_rx_gcd_timestamps", rx_gcd.timestamps),
1110         MLXSW_SP_PTP_PORT_STAT("ptp_tx_gcd_packets",    tx_gcd.packets),
1111         MLXSW_SP_PTP_PORT_STAT("ptp_tx_gcd_timestamps", tx_gcd.timestamps),
1112 };
1113
1114 #undef MLXSW_SP_PTP_PORT_STAT
1115
1116 #define MLXSW_SP_PTP_PORT_STATS_LEN \
1117         ARRAY_SIZE(mlxsw_sp_ptp_port_stats)
1118
1119 int mlxsw_sp1_get_stats_count(void)
1120 {
1121         return MLXSW_SP_PTP_PORT_STATS_LEN;
1122 }
1123
1124 void mlxsw_sp1_get_stats_strings(u8 **p)
1125 {
1126         int i;
1127
1128         for (i = 0; i < MLXSW_SP_PTP_PORT_STATS_LEN; i++) {
1129                 memcpy(*p, mlxsw_sp_ptp_port_stats[i].str,
1130                        ETH_GSTRING_LEN);
1131                 *p += ETH_GSTRING_LEN;
1132         }
1133 }
1134
1135 void mlxsw_sp1_get_stats(struct mlxsw_sp_port *mlxsw_sp_port,
1136                          u64 *data, int data_index)
1137 {
1138         void *stats = &mlxsw_sp_port->ptp.stats;
1139         ptrdiff_t offset;
1140         int i;
1141
1142         data += data_index;
1143         for (i = 0; i < MLXSW_SP_PTP_PORT_STATS_LEN; i++) {
1144                 offset = mlxsw_sp_ptp_port_stats[i].offset;
1145                 *data++ = *(u64 *)(stats + offset);
1146         }
1147 }