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 rhashtable 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 rhash_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 struct mlxsw_sp1_ptp_unmatched *
 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         struct mlxsw_sp1_ptp_unmatched *conflict;
 372
 373         unmatched = kzalloc(sizeof(*unmatched), GFP_ATOMIC);
 374         if (!unmatched)
 375                 return ERR_PTR(-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         conflict = rhashtable_lookup_get_insert_fast(&ptp_state->unmatched_ht,
 383                                             &unmatched->ht_node,
 384                                             mlxsw_sp1_ptp_unmatched_ht_params);
 385         if (conflict)
 386                 kfree(unmatched);
 387
 388         return conflict;
 389 }
 390
 391 static struct mlxsw_sp1_ptp_unmatched *
 392 mlxsw_sp1_ptp_unmatched_lookup(struct mlxsw_sp *mlxsw_sp,
 393                                struct mlxsw_sp1_ptp_key key)
 394 {
 395         return rhashtable_lookup(&mlxsw_sp->ptp_state->unmatched_ht, &key,
 396                                  mlxsw_sp1_ptp_unmatched_ht_params);
 397 }
 398
 399 static int
 400 mlxsw_sp1_ptp_unmatched_remove(struct mlxsw_sp *mlxsw_sp,
 401                                struct mlxsw_sp1_ptp_unmatched *unmatched)
 402 {
 403         return rhashtable_remove_fast(&mlxsw_sp->ptp_state->unmatched_ht,
 404                                       &unmatched->ht_node,
 405                                       mlxsw_sp1_ptp_unmatched_ht_params);
 406 }
 407
 408 /* This function is called in the following scenarios:
 409  *
 410  * 1) When a packet is matched with its timestamp.
 411  * 2) In several situation when it is necessary to immediately pass on
 412  *    an SKB without a timestamp.
 413  * 3) From GC indirectly through mlxsw_sp1_ptp_unmatched_finish().
 414  *    This case is similar to 2) above.
 415  */
 416 static void mlxsw_sp1_ptp_packet_finish(struct mlxsw_sp *mlxsw_sp,
 417                                         struct sk_buff *skb, u8 local_port,
 418                                         bool ingress,
 419                                         struct skb_shared_hwtstamps *hwtstamps)
 420 {
 421         struct mlxsw_sp_port *mlxsw_sp_port;
 422
 423         /* Between capturing the packet and finishing it, there is a window of
 424          * opportunity for the originating port to go away (e.g. due to a
 425          * split). Also make sure the SKB device reference is still valid.
 426          */
 427         mlxsw_sp_port = mlxsw_sp->ports[local_port];
 428         if (!(mlxsw_sp_port && (!skb->dev || skb->dev == mlxsw_sp_port->dev))) {
 429                 dev_kfree_skb_any(skb);
 430                 return;
 431         }
 432
 433         if (ingress) {
 434                 if (hwtstamps)
 435                         *skb_hwtstamps(skb) = *hwtstamps;
 436                 mlxsw_sp_rx_listener_no_mark_func(skb, local_port, mlxsw_sp);
 437         } else {
 438                 /* skb_tstamp_tx() allows hwtstamps to be NULL. */
 439                 skb_tstamp_tx(skb, hwtstamps);
 440                 dev_kfree_skb_any(skb);
 441         }
 442 }
 443
 444 static void mlxsw_sp1_packet_timestamp(struct mlxsw_sp *mlxsw_sp,
 445                                        struct mlxsw_sp1_ptp_key key,
 446                                        struct sk_buff *skb,
 447                                        u64 timestamp)
 448 {
 449         struct skb_shared_hwtstamps hwtstamps;
 450         u64 nsec;
 451
 452         spin_lock_bh(&mlxsw_sp->clock->lock);
 453         nsec = timecounter_cyc2time(&mlxsw_sp->clock->tc, timestamp);
 454         spin_unlock_bh(&mlxsw_sp->clock->lock);
 455
 456         hwtstamps.hwtstamp = ns_to_ktime(nsec);
 457         mlxsw_sp1_ptp_packet_finish(mlxsw_sp, skb,
 458                                     key.local_port, key.ingress, &hwtstamps);
 459 }
 460
 461 static void
 462 mlxsw_sp1_ptp_unmatched_finish(struct mlxsw_sp *mlxsw_sp,
 463                                struct mlxsw_sp1_ptp_unmatched *unmatched)
 464 {
 465         if (unmatched->skb && unmatched->timestamp)
 466                 mlxsw_sp1_packet_timestamp(mlxsw_sp, unmatched->key,
 467                                            unmatched->skb,
 468                                            unmatched->timestamp);
 469         else if (unmatched->skb)
 470                 mlxsw_sp1_ptp_packet_finish(mlxsw_sp, unmatched->skb,
 471                                             unmatched->key.local_port,
 472                                             unmatched->key.ingress, NULL);
 473         kfree_rcu(unmatched, rcu);
 474 }
 475
 476 static void mlxsw_sp1_ptp_unmatched_free_fn(void *ptr, void *arg)
 477 {
 478         struct mlxsw_sp1_ptp_unmatched *unmatched = ptr;
 479
 480         /* This is invoked at a point where the ports are gone already. Nothing
 481          * to do with whatever is left in the HT but to free it.
 482          */
 483         if (unmatched->skb)
 484                 dev_kfree_skb_any(unmatched->skb);
 485         kfree_rcu(unmatched, rcu);
 486 }
 487
 488 static void mlxsw_sp1_ptp_got_piece(struct mlxsw_sp *mlxsw_sp,
 489                                     struct mlxsw_sp1_ptp_key key,
 490                                     struct sk_buff *skb, u64 timestamp)
 491 {
 492         struct mlxsw_sp1_ptp_unmatched *unmatched, *conflict;
 493         int err;
 494
 495         rcu_read_lock();
 496
 497         unmatched = mlxsw_sp1_ptp_unmatched_lookup(mlxsw_sp, key);
 498
 499         spin_lock(&mlxsw_sp->ptp_state->unmatched_lock);
 500
 501         if (unmatched) {
 502                 /* There was an unmatched entry when we looked, but it may have
 503                  * been removed before we took the lock.
 504                  */
 505                 err = mlxsw_sp1_ptp_unmatched_remove(mlxsw_sp, unmatched);
 506                 if (err)
 507                         unmatched = NULL;
 508         }
 509
 510         if (!unmatched) {
 511                 /* We have no unmatched entry, but one may have been added after
 512                  * we looked, but before we took the lock.
 513                  */
 514                 unmatched = mlxsw_sp1_ptp_unmatched_save(mlxsw_sp, key,
 515                                                          skb, timestamp);
 516                 if (IS_ERR(unmatched)) {
 517                         if (skb)
 518                                 mlxsw_sp1_ptp_packet_finish(mlxsw_sp, skb,
 519                                                             key.local_port,
 520                                                             key.ingress, NULL);
 521                         unmatched = NULL;
 522                 } else if (unmatched) {
 523                         /* Save just told us, under lock, that the entry is
 524                          * there, so this has to work.
 525                          */
 526                         err = mlxsw_sp1_ptp_unmatched_remove(mlxsw_sp,
 527                                                              unmatched);
 528                         WARN_ON_ONCE(err);
 529                 }
 530         }
 531
 532         /* If unmatched is non-NULL here, it comes either from the lookup, or
 533          * from the save attempt above. In either case the entry was removed
 534          * from the hash table. If unmatched is NULL, a new unmatched entry was
 535          * added to the hash table, and there was no conflict.
 536          */
 537
 538         if (skb && unmatched && unmatched->timestamp) {
 539                 unmatched->skb = skb;
 540         } else if (timestamp && unmatched && unmatched->skb) {
 541                 unmatched->timestamp = timestamp;
 542         } else if (unmatched) {
 543                 /* unmatched holds an older entry of the same type: either an
 544                  * skb if we are handling skb, or a timestamp if we are handling
 545                  * timestamp. We can't match that up, so save what we have.
 546                  */
 547                 conflict = mlxsw_sp1_ptp_unmatched_save(mlxsw_sp, key,
 548                                                         skb, timestamp);
 549                 if (IS_ERR(conflict)) {
 550                         if (skb)
 551                                 mlxsw_sp1_ptp_packet_finish(mlxsw_sp, skb,
 552                                                             key.local_port,
 553                                                             key.ingress, NULL);
 554                 } else {
 555                         /* Above, we removed an object with this key from the
 556                          * hash table, under lock, so conflict can not be a
 557                          * valid pointer.
 558                          */
 559                         WARN_ON_ONCE(conflict);
 560                 }
 561         }
 562
 563         spin_unlock(&mlxsw_sp->ptp_state->unmatched_lock);
 564
 565         if (unmatched)
 566                 mlxsw_sp1_ptp_unmatched_finish(mlxsw_sp, unmatched);
 567
 568         rcu_read_unlock();
 569 }
 570
 571 static void mlxsw_sp1_ptp_got_packet(struct mlxsw_sp *mlxsw_sp,
 572                                      struct sk_buff *skb, u8 local_port,
 573                                      bool ingress)
 574 {
 575         struct mlxsw_sp_port *mlxsw_sp_port;
 576         struct mlxsw_sp1_ptp_key key;
 577         u8 types;
 578         int err;
 579
 580         mlxsw_sp_port = mlxsw_sp->ports[local_port];
 581         if (!mlxsw_sp_port)
 582                 goto immediate;
 583
 584         types = ingress ? mlxsw_sp_port->ptp.ing_types :
 585                           mlxsw_sp_port->ptp.egr_types;
 586         if (!types)
 587                 goto immediate;
 588
 589         memset(&key, 0, sizeof(key));
 590         key.local_port = local_port;
 591         key.ingress = ingress;
 592
 593         err = mlxsw_sp_ptp_parse(skb, &key.domain_number, &key.message_type,
 594                                  &key.sequence_id);
 595         if (err)
 596                 goto immediate;
 597
 598         /* For packets whose timestamping was not enabled on this port, don't
 599          * bother trying to match the timestamp.
 600          */
 601         if (!((1 << key.message_type) & types))
 602                 goto immediate;
 603
 604         mlxsw_sp1_ptp_got_piece(mlxsw_sp, key, skb, 0);
 605         return;
 606
 607 immediate:
 608         mlxsw_sp1_ptp_packet_finish(mlxsw_sp, skb, local_port, ingress, NULL);
 609 }
 610
 611 void mlxsw_sp1_ptp_got_timestamp(struct mlxsw_sp *mlxsw_sp, bool ingress,
 612                                  u8 local_port, u8 message_type,
 613                                  u8 domain_number, u16 sequence_id,
 614                                  u64 timestamp)
 615 {
 616         struct mlxsw_sp_port *mlxsw_sp_port;
 617         struct mlxsw_sp1_ptp_key key;
 618         u8 types;
 619
 620         mlxsw_sp_port = mlxsw_sp->ports[local_port];
 621         if (!mlxsw_sp_port)
 622                 return;
 623
 624         types = ingress ? mlxsw_sp_port->ptp.ing_types :
 625                           mlxsw_sp_port->ptp.egr_types;
 626
 627         /* For message types whose timestamping was not enabled on this port,
 628          * don't bother with the timestamp.
 629          */
 630         if (!((1 << message_type) & types))
 631                 return;
 632
 633         memset(&key, 0, sizeof(key));
 634         key.local_port = local_port;
 635         key.domain_number = domain_number;
 636         key.message_type = message_type;
 637         key.sequence_id = sequence_id;
 638         key.ingress = ingress;
 639
 640         mlxsw_sp1_ptp_got_piece(mlxsw_sp, key, NULL, timestamp);
 641 }
 642
 643 void mlxsw_sp1_ptp_receive(struct mlxsw_sp *mlxsw_sp, struct sk_buff *skb,
 644                            u8 local_port)
 645 {
 646         skb_reset_mac_header(skb);
 647         mlxsw_sp1_ptp_got_packet(mlxsw_sp, skb, local_port, true);
 648 }
 649
 650 void mlxsw_sp1_ptp_transmitted(struct mlxsw_sp *mlxsw_sp,
 651                                struct sk_buff *skb, u8 local_port)
 652 {
 653         mlxsw_sp1_ptp_got_packet(mlxsw_sp, skb, local_port, false);
 654 }
 655
 656 static void
 657 mlxsw_sp1_ptp_ht_gc_collect(struct mlxsw_sp_ptp_state *ptp_state,
 658                             struct mlxsw_sp1_ptp_unmatched *unmatched)
 659 {
 660         int err;
 661
 662         /* If an unmatched entry has an SKB, it has to be handed over to the
 663          * networking stack. This is usually done from a trap handler, which is
 664          * invoked in a softirq context. Here we are going to do it in process
 665          * context. If that were to be interrupted by a softirq, it could cause
 666          * a deadlock when an attempt is made to take an already-taken lock
 667          * somewhere along the sending path. Disable softirqs to prevent this.
 668          */
 669         local_bh_disable();
 670
 671         spin_lock(&ptp_state->unmatched_lock);
 672         err = rhashtable_remove_fast(&ptp_state->unmatched_ht,
 673                                      &unmatched->ht_node,
 674                                      mlxsw_sp1_ptp_unmatched_ht_params);
 675         spin_unlock(&ptp_state->unmatched_lock);
 676
 677         if (err)
 678                 /* The packet was matched with timestamp during the walk. */
 679                 goto out;
 680
 681         /* mlxsw_sp1_ptp_unmatched_finish() invokes netif_receive_skb(). While
 682          * the comment at that function states that it can only be called in
 683          * soft IRQ context, this pattern of local_bh_disable() +
 684          * netif_receive_skb(), in process context, is seen elsewhere in the
 685          * kernel, notably in pktgen.
 686          */
 687         mlxsw_sp1_ptp_unmatched_finish(ptp_state->mlxsw_sp, unmatched);
 688
 689 out:
 690         local_bh_enable();
 691 }
 692
 693 static void mlxsw_sp1_ptp_ht_gc(struct work_struct *work)
 694 {
 695         struct delayed_work *dwork = to_delayed_work(work);
 696         struct mlxsw_sp1_ptp_unmatched *unmatched;
 697         struct mlxsw_sp_ptp_state *ptp_state;
 698         struct rhashtable_iter iter;
 699         u32 gc_cycle;
 700         void *obj;
 701
 702         ptp_state = container_of(dwork, struct mlxsw_sp_ptp_state, ht_gc_dw);
 703         gc_cycle = ptp_state->gc_cycle++;
 704
 705         rhashtable_walk_enter(&ptp_state->unmatched_ht, &iter);
 706         rhashtable_walk_start(&iter);
 707         while ((obj = rhashtable_walk_next(&iter))) {
 708                 if (IS_ERR(obj))
 709                         continue;
 710
 711                 unmatched = obj;
 712                 if (unmatched->gc_cycle <= gc_cycle)
 713                         mlxsw_sp1_ptp_ht_gc_collect(ptp_state, unmatched);
 714         }
 715         rhashtable_walk_stop(&iter);
 716         rhashtable_walk_exit(&iter);
 717
 718         mlxsw_core_schedule_dw(&ptp_state->ht_gc_dw,
 719                                MLXSW_SP1_PTP_HT_GC_INTERVAL);
 720 }
 721
 722 static int mlxsw_sp_ptp_mtptpt_set(struct mlxsw_sp *mlxsw_sp,
 723                                    enum mlxsw_reg_mtptpt_trap_id trap_id,
 724                                    u16 message_type)
 725 {
 726         char mtptpt_pl[MLXSW_REG_MTPTPT_LEN];
 727
 728         mlxsw_reg_mtptptp_pack(mtptpt_pl, trap_id, message_type);
 729         return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(mtptpt), mtptpt_pl);
 730 }
 731
 732 static int mlxsw_sp1_ptp_set_fifo_clr_on_trap(struct mlxsw_sp *mlxsw_sp,
 733                                               bool clr)
 734 {
 735         char mogcr_pl[MLXSW_REG_MOGCR_LEN] = {0};
 736         int err;
 737
 738         err = mlxsw_reg_query(mlxsw_sp->core, MLXSW_REG(mogcr), mogcr_pl);
 739         if (err)
 740                 return err;
 741
 742         mlxsw_reg_mogcr_ptp_iftc_set(mogcr_pl, clr);
 743         mlxsw_reg_mogcr_ptp_eftc_set(mogcr_pl, clr);
 744         return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(mogcr), mogcr_pl);
 745 }
 746
 747 static int mlxsw_sp1_ptp_mtpppc_set(struct mlxsw_sp *mlxsw_sp,
 748                                     u16 ing_types, u16 egr_types)
 749 {
 750         char mtpppc_pl[MLXSW_REG_MTPPPC_LEN];
 751
 752         mlxsw_reg_mtpppc_pack(mtpppc_pl, ing_types, egr_types);
 753         return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(mtpppc), mtpppc_pl);
 754 }
 755
 756 struct mlxsw_sp1_ptp_shaper_params {
 757         u32 ethtool_speed;
 758         enum mlxsw_reg_qpsc_port_speed port_speed;
 759         u8 shaper_time_exp;
 760         u8 shaper_time_mantissa;
 761         u8 shaper_inc;
 762         u8 shaper_bs;
 763         u8 port_to_shaper_credits;
 764         int ing_timestamp_inc;
 765         int egr_timestamp_inc;
 766 };
 767
 768 static const struct mlxsw_sp1_ptp_shaper_params
 769 mlxsw_sp1_ptp_shaper_params[] = {
 770         {
 771                 .ethtool_speed          = SPEED_100,
 772                 .port_speed             = MLXSW_REG_QPSC_PORT_SPEED_100M,
 773                 .shaper_time_exp        = 4,
 774                 .shaper_time_mantissa   = 12,
 775                 .shaper_inc             = 9,
 776                 .shaper_bs              = 1,
 777                 .port_to_shaper_credits = 1,
 778                 .ing_timestamp_inc      = -313,
 779                 .egr_timestamp_inc      = 313,
 780         },
 781         {
 782                 .ethtool_speed          = SPEED_1000,
 783                 .port_speed             = MLXSW_REG_QPSC_PORT_SPEED_1G,
 784                 .shaper_time_exp        = 0,
 785                 .shaper_time_mantissa   = 12,
 786                 .shaper_inc             = 6,
 787                 .shaper_bs              = 0,
 788                 .port_to_shaper_credits = 1,
 789                 .ing_timestamp_inc      = -35,
 790                 .egr_timestamp_inc      = 35,
 791         },
 792         {
 793                 .ethtool_speed          = SPEED_10000,
 794                 .port_speed             = MLXSW_REG_QPSC_PORT_SPEED_10G,
 795                 .shaper_time_exp        = 0,
 796                 .shaper_time_mantissa   = 2,
 797                 .shaper_inc             = 14,
 798                 .shaper_bs              = 1,
 799                 .port_to_shaper_credits = 1,
 800                 .ing_timestamp_inc      = -11,
 801                 .egr_timestamp_inc      = 11,
 802         },
 803         {
 804                 .ethtool_speed          = SPEED_25000,
 805                 .port_speed             = MLXSW_REG_QPSC_PORT_SPEED_25G,
 806                 .shaper_time_exp        = 0,
 807                 .shaper_time_mantissa   = 0,
 808                 .shaper_inc             = 11,
 809                 .shaper_bs              = 1,
 810                 .port_to_shaper_credits = 1,
 811                 .ing_timestamp_inc      = -14,
 812                 .egr_timestamp_inc      = 14,
 813         },
 814 };
 815
 816 #define MLXSW_SP1_PTP_SHAPER_PARAMS_LEN ARRAY_SIZE(mlxsw_sp1_ptp_shaper_params)
 817
 818 static int mlxsw_sp1_ptp_shaper_params_set(struct mlxsw_sp *mlxsw_sp)
 819 {
 820         const struct mlxsw_sp1_ptp_shaper_params *params;
 821         char qpsc_pl[MLXSW_REG_QPSC_LEN];
 822         int i, err;
 823
 824         for (i = 0; i < MLXSW_SP1_PTP_SHAPER_PARAMS_LEN; i++) {
 825                 params = &mlxsw_sp1_ptp_shaper_params[i];
 826                 mlxsw_reg_qpsc_pack(qpsc_pl, params->port_speed,
 827                                     params->shaper_time_exp,
 828                                     params->shaper_time_mantissa,
 829                                     params->shaper_inc, params->shaper_bs,
 830                                     params->port_to_shaper_credits,
 831                                     params->ing_timestamp_inc,
 832                                     params->egr_timestamp_inc);
 833                 err = mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(qpsc), qpsc_pl);
 834                 if (err)
 835                         return err;
 836         }
 837
 838         return 0;
 839 }
 840
 841 struct mlxsw_sp_ptp_state *mlxsw_sp1_ptp_init(struct mlxsw_sp *mlxsw_sp)
 842 {
 843         struct mlxsw_sp_ptp_state *ptp_state;
 844         u16 message_type;
 845         int err;
 846
 847         err = mlxsw_sp1_ptp_shaper_params_set(mlxsw_sp);
 848         if (err)
 849                 return ERR_PTR(err);
 850
 851         ptp_state = kzalloc(sizeof(*ptp_state), GFP_KERNEL);
 852         if (!ptp_state)
 853                 return ERR_PTR(-ENOMEM);
 854         ptp_state->mlxsw_sp = mlxsw_sp;
 855
 856         spin_lock_init(&ptp_state->unmatched_lock);
 857
 858         err = rhashtable_init(&ptp_state->unmatched_ht,
 859                               &mlxsw_sp1_ptp_unmatched_ht_params);
 860         if (err)
 861                 goto err_hashtable_init;
 862
 863         /* Delive these message types as PTP0. */
 864         message_type = BIT(MLXSW_SP_PTP_MESSAGE_TYPE_SYNC) |
 865                        BIT(MLXSW_SP_PTP_MESSAGE_TYPE_DELAY_REQ) |
 866                        BIT(MLXSW_SP_PTP_MESSAGE_TYPE_PDELAY_REQ) |
 867                        BIT(MLXSW_SP_PTP_MESSAGE_TYPE_PDELAY_RESP);
 868         err = mlxsw_sp_ptp_mtptpt_set(mlxsw_sp, MLXSW_REG_MTPTPT_TRAP_ID_PTP0,
 869                                       message_type);
 870         if (err)
 871                 goto err_mtptpt_set;
 872
 873         /* Everything else is PTP1. */
 874         message_type = ~message_type;
 875         err = mlxsw_sp_ptp_mtptpt_set(mlxsw_sp, MLXSW_REG_MTPTPT_TRAP_ID_PTP1,
 876                                       message_type);
 877         if (err)
 878                 goto err_mtptpt1_set;
 879
 880         err = mlxsw_sp1_ptp_set_fifo_clr_on_trap(mlxsw_sp, true);
 881         if (err)
 882                 goto err_fifo_clr;
 883
 884         INIT_DELAYED_WORK(&ptp_state->ht_gc_dw, mlxsw_sp1_ptp_ht_gc);
 885         mlxsw_core_schedule_dw(&ptp_state->ht_gc_dw,
 886                                MLXSW_SP1_PTP_HT_GC_INTERVAL);
 887         return ptp_state;
 888
 889 err_fifo_clr:
 890         mlxsw_sp_ptp_mtptpt_set(mlxsw_sp, MLXSW_REG_MTPTPT_TRAP_ID_PTP1, 0);
 891 err_mtptpt1_set:
 892         mlxsw_sp_ptp_mtptpt_set(mlxsw_sp, MLXSW_REG_MTPTPT_TRAP_ID_PTP0, 0);
 893 err_mtptpt_set:
 894         rhashtable_destroy(&ptp_state->unmatched_ht);
 895 err_hashtable_init:
 896         kfree(ptp_state);
 897         return ERR_PTR(err);
 898 }
 899
 900 void mlxsw_sp1_ptp_fini(struct mlxsw_sp_ptp_state *ptp_state)
 901 {
 902         struct mlxsw_sp *mlxsw_sp = ptp_state->mlxsw_sp;
 903
 904         cancel_delayed_work_sync(&ptp_state->ht_gc_dw);
 905         mlxsw_sp1_ptp_mtpppc_set(mlxsw_sp, 0, 0);
 906         mlxsw_sp1_ptp_set_fifo_clr_on_trap(mlxsw_sp, false);
 907         mlxsw_sp_ptp_mtptpt_set(mlxsw_sp, MLXSW_REG_MTPTPT_TRAP_ID_PTP1, 0);
 908         mlxsw_sp_ptp_mtptpt_set(mlxsw_sp, MLXSW_REG_MTPTPT_TRAP_ID_PTP0, 0);
 909         rhashtable_free_and_destroy(&ptp_state->unmatched_ht,
 910                                     &mlxsw_sp1_ptp_unmatched_free_fn, NULL);
 911         kfree(ptp_state);
 912 }
 913
 914 int mlxsw_sp1_ptp_hwtstamp_get(struct mlxsw_sp_port *mlxsw_sp_port,
 915                                struct hwtstamp_config *config)
 916 {
 917         *config = mlxsw_sp_port->ptp.hwtstamp_config;
 918         return 0;
 919 }
 920
 921 static int mlxsw_sp_ptp_get_message_types(const struct hwtstamp_config *config,
 922                                           u16 *p_ing_types, u16 *p_egr_types,
 923                                           enum hwtstamp_rx_filters *p_rx_filter)
 924 {
 925         enum hwtstamp_rx_filters rx_filter = config->rx_filter;
 926         enum hwtstamp_tx_types tx_type = config->tx_type;
 927         u16 ing_types = 0x00;
 928         u16 egr_types = 0x00;
 929
 930         switch (tx_type) {
 931         case HWTSTAMP_TX_OFF:
 932                 egr_types = 0x00;
 933                 break;
 934         case HWTSTAMP_TX_ON:
 935                 egr_types = 0xff;
 936                 break;
 937         case HWTSTAMP_TX_ONESTEP_SYNC:
 938                 return -ERANGE;
 939         }
 940
 941         switch (rx_filter) {
 942         case HWTSTAMP_FILTER_NONE:
 943                 ing_types = 0x00;
 944                 break;
 945         case HWTSTAMP_FILTER_PTP_V1_L4_SYNC:
 946         case HWTSTAMP_FILTER_PTP_V2_L4_SYNC:
 947         case HWTSTAMP_FILTER_PTP_V2_L2_SYNC:
 948         case HWTSTAMP_FILTER_PTP_V2_SYNC:
 949                 ing_types = 0x01;
 950                 break;
 951         case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ:
 952         case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ:
 953         case HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ:
 954         case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ:
 955                 ing_types = 0x02;
 956                 break;
 957         case HWTSTAMP_FILTER_PTP_V1_L4_EVENT:
 958         case HWTSTAMP_FILTER_PTP_V2_L4_EVENT:
 959         case HWTSTAMP_FILTER_PTP_V2_L2_EVENT:
 960         case HWTSTAMP_FILTER_PTP_V2_EVENT:
 961                 ing_types = 0x0f;
 962                 break;
 963         case HWTSTAMP_FILTER_ALL:
 964                 ing_types = 0xff;
 965                 break;
 966         case HWTSTAMP_FILTER_SOME:
 967         case HWTSTAMP_FILTER_NTP_ALL:
 968                 return -ERANGE;
 969         }
 970
 971         *p_ing_types = ing_types;
 972         *p_egr_types = egr_types;
 973         *p_rx_filter = rx_filter;
 974         return 0;
 975 }
 976
 977 static int mlxsw_sp1_ptp_mtpppc_update(struct mlxsw_sp_port *mlxsw_sp_port,
 978                                        u16 ing_types, u16 egr_types)
 979 {
 980         struct mlxsw_sp *mlxsw_sp = mlxsw_sp_port->mlxsw_sp;
 981         struct mlxsw_sp_port *tmp;
 982         u16 orig_ing_types = 0;
 983         u16 orig_egr_types = 0;
 984         int err;
 985         int i;
 986
 987         /* MTPPPC configures timestamping globally, not per port. Find the
 988          * configuration that contains all configured timestamping requests.
 989          */
 990         for (i = 1; i < mlxsw_core_max_ports(mlxsw_sp->core); i++) {
 991                 tmp = mlxsw_sp->ports[i];
 992                 if (tmp) {
 993                         orig_ing_types |= tmp->ptp.ing_types;
 994                         orig_egr_types |= tmp->ptp.egr_types;
 995                 }
 996                 if (tmp && tmp != mlxsw_sp_port) {
 997                         ing_types |= tmp->ptp.ing_types;
 998                         egr_types |= tmp->ptp.egr_types;
 999                 }
1000         }
1001
1002         if ((ing_types || egr_types) && !(orig_ing_types || orig_egr_types)) {
1003                 err = mlxsw_sp_nve_inc_parsing_depth_get(mlxsw_sp);
1004                 if (err) {
1005                         netdev_err(mlxsw_sp_port->dev, "Failed to increase parsing depth");
1006                         return err;
1007                 }
1008         }
1009         if (!(ing_types || egr_types) && (orig_ing_types || orig_egr_types))
1010                 mlxsw_sp_nve_inc_parsing_depth_put(mlxsw_sp);
1011
1012         return mlxsw_sp1_ptp_mtpppc_set(mlxsw_sp_port->mlxsw_sp,
1013                                        ing_types, egr_types);
1014 }
1015
1016 static bool mlxsw_sp1_ptp_hwtstamp_enabled(struct mlxsw_sp_port *mlxsw_sp_port)
1017 {
1018         return mlxsw_sp_port->ptp.ing_types || mlxsw_sp_port->ptp.egr_types;
1019 }
1020
1021 static int
1022 mlxsw_sp1_ptp_port_shaper_set(struct mlxsw_sp_port *mlxsw_sp_port, bool enable)
1023 {
1024         struct mlxsw_sp *mlxsw_sp = mlxsw_sp_port->mlxsw_sp;
1025         char qeec_pl[MLXSW_REG_QEEC_LEN];
1026
1027         mlxsw_reg_qeec_ptps_pack(qeec_pl, mlxsw_sp_port->local_port, enable);
1028         return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(qeec), qeec_pl);
1029 }
1030
1031 static int mlxsw_sp1_ptp_port_shaper_check(struct mlxsw_sp_port *mlxsw_sp_port)
1032 {
1033         const struct mlxsw_sp_port_type_speed_ops *port_type_speed_ops;
1034         struct mlxsw_sp *mlxsw_sp = mlxsw_sp_port->mlxsw_sp;
1035         char ptys_pl[MLXSW_REG_PTYS_LEN];
1036         u32 eth_proto_oper, speed;
1037         bool ptps = false;
1038         int err, i;
1039
1040         if (!mlxsw_sp1_ptp_hwtstamp_enabled(mlxsw_sp_port))
1041                 return mlxsw_sp1_ptp_port_shaper_set(mlxsw_sp_port, false);
1042
1043         port_type_speed_ops = mlxsw_sp->port_type_speed_ops;
1044         port_type_speed_ops->reg_ptys_eth_pack(mlxsw_sp, ptys_pl,
1045                                                mlxsw_sp_port->local_port, 0,
1046                                                false);
1047         err = mlxsw_reg_query(mlxsw_sp->core, MLXSW_REG(ptys), ptys_pl);
1048         if (err)
1049                 return err;
1050         port_type_speed_ops->reg_ptys_eth_unpack(mlxsw_sp, ptys_pl, NULL, NULL,
1051                                                  &eth_proto_oper);
1052
1053         speed = port_type_speed_ops->from_ptys_speed(mlxsw_sp, eth_proto_oper);
1054         for (i = 0; i < MLXSW_SP1_PTP_SHAPER_PARAMS_LEN; i++) {
1055                 if (mlxsw_sp1_ptp_shaper_params[i].ethtool_speed == speed) {
1056                         ptps = true;
1057                         break;
1058                 }
1059         }
1060
1061         return mlxsw_sp1_ptp_port_shaper_set(mlxsw_sp_port, ptps);
1062 }
1063
1064 void mlxsw_sp1_ptp_shaper_work(struct work_struct *work)
1065 {
1066         struct delayed_work *dwork = to_delayed_work(work);
1067         struct mlxsw_sp_port *mlxsw_sp_port;
1068         int err;
1069
1070         mlxsw_sp_port = container_of(dwork, struct mlxsw_sp_port,
1071                                      ptp.shaper_dw);
1072
1073         if (!mlxsw_sp1_ptp_hwtstamp_enabled(mlxsw_sp_port))
1074                 return;
1075
1076         err = mlxsw_sp1_ptp_port_shaper_check(mlxsw_sp_port);
1077         if (err)
1078                 netdev_err(mlxsw_sp_port->dev, "Failed to set up PTP shaper\n");
1079 }
1080
1081 int mlxsw_sp1_ptp_hwtstamp_set(struct mlxsw_sp_port *mlxsw_sp_port,
1082                                struct hwtstamp_config *config)
1083 {
1084         enum hwtstamp_rx_filters rx_filter;
1085         u16 ing_types;
1086         u16 egr_types;
1087         int err;
1088
1089         err = mlxsw_sp_ptp_get_message_types(config, &ing_types, &egr_types,
1090                                              &rx_filter);
1091         if (err)
1092                 return err;
1093
1094         err = mlxsw_sp1_ptp_mtpppc_update(mlxsw_sp_port, ing_types, egr_types);
1095         if (err)
1096                 return err;
1097
1098         mlxsw_sp_port->ptp.hwtstamp_config = *config;
1099         mlxsw_sp_port->ptp.ing_types = ing_types;
1100         mlxsw_sp_port->ptp.egr_types = egr_types;
1101
1102         err = mlxsw_sp1_ptp_port_shaper_check(mlxsw_sp_port);
1103         if (err)
1104                 return err;
1105
1106         /* Notify the ioctl caller what we are actually timestamping. */
1107         config->rx_filter = rx_filter;
1108
1109         return 0;
1110 }
1111
1112 int mlxsw_sp1_ptp_get_ts_info(struct mlxsw_sp *mlxsw_sp,
1113                               struct ethtool_ts_info *info)
1114 {
1115         info->phc_index = ptp_clock_index(mlxsw_sp->clock->ptp);
1116
1117         info->so_timestamping = SOF_TIMESTAMPING_TX_HARDWARE |
1118                                 SOF_TIMESTAMPING_RX_HARDWARE |
1119                                 SOF_TIMESTAMPING_RAW_HARDWARE;
1120
1121         info->tx_types = BIT(HWTSTAMP_TX_OFF) |
1122                          BIT(HWTSTAMP_TX_ON);
1123
1124         info->rx_filters = BIT(HWTSTAMP_FILTER_NONE) |
1125                            BIT(HWTSTAMP_FILTER_ALL);
1126
1127         return 0;
1128 }