1// SPDX-License-Identifier: GPL-2.0 2/* Copyright(c) 2017 - 2021 Pensando Systems, Inc */ 3 4#include <linux/netdevice.h> 5#include <linux/etherdevice.h> 6 7#include "ionic.h" 8#include "ionic_bus.h" 9#include "ionic_lif.h" 10#include "ionic_ethtool.h" 11 12static int ionic_hwstamp_tx_mode(int config_tx_type) 13{ 14 switch (config_tx_type) { 15 case HWTSTAMP_TX_OFF: 16 return IONIC_TXSTAMP_OFF; 17 case HWTSTAMP_TX_ON: 18 return IONIC_TXSTAMP_ON; 19 case HWTSTAMP_TX_ONESTEP_SYNC: 20 return IONIC_TXSTAMP_ONESTEP_SYNC; 21 case HWTSTAMP_TX_ONESTEP_P2P: 22 return IONIC_TXSTAMP_ONESTEP_P2P; 23 default: 24 return -ERANGE; 25 } 26} 27 28static u64 ionic_hwstamp_rx_filt(int config_rx_filter) 29{ 30 switch (config_rx_filter) { 31 case HWTSTAMP_FILTER_PTP_V1_L4_EVENT: 32 return IONIC_PKT_CLS_PTP1_ALL; 33 case HWTSTAMP_FILTER_PTP_V1_L4_SYNC: 34 return IONIC_PKT_CLS_PTP1_SYNC; 35 case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ: 36 return IONIC_PKT_CLS_PTP1_SYNC | IONIC_PKT_CLS_PTP1_DREQ; 37 38 case HWTSTAMP_FILTER_PTP_V2_L4_EVENT: 39 return IONIC_PKT_CLS_PTP2_L4_ALL; 40 case HWTSTAMP_FILTER_PTP_V2_L4_SYNC: 41 return IONIC_PKT_CLS_PTP2_L4_SYNC; 42 case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ: 43 return IONIC_PKT_CLS_PTP2_L4_SYNC | IONIC_PKT_CLS_PTP2_L4_DREQ; 44 45 case HWTSTAMP_FILTER_PTP_V2_L2_EVENT: 46 return IONIC_PKT_CLS_PTP2_L2_ALL; 47 case HWTSTAMP_FILTER_PTP_V2_L2_SYNC: 48 return IONIC_PKT_CLS_PTP2_L2_SYNC; 49 case HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ: 50 return IONIC_PKT_CLS_PTP2_L2_SYNC | IONIC_PKT_CLS_PTP2_L2_DREQ; 51 52 case HWTSTAMP_FILTER_PTP_V2_EVENT: 53 return IONIC_PKT_CLS_PTP2_ALL; 54 case HWTSTAMP_FILTER_PTP_V2_SYNC: 55 return IONIC_PKT_CLS_PTP2_SYNC; 56 case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ: 57 return IONIC_PKT_CLS_PTP2_SYNC | IONIC_PKT_CLS_PTP2_DREQ; 58 59 case HWTSTAMP_FILTER_NTP_ALL: 60 return IONIC_PKT_CLS_NTP_ALL; 61 62 default: 63 return 0; 64 } 65} 66 67static int ionic_lif_hwstamp_set_ts_config(struct ionic_lif *lif, 68 struct hwtstamp_config *new_ts) 69{ 70 struct ionic *ionic = lif->ionic; 71 struct hwtstamp_config *config; 72 struct hwtstamp_config ts; 73 int tx_mode = 0; 74 u64 rx_filt = 0; 75 int err, err2; 76 bool rx_all; 77 __le64 mask; 78 79 if (!lif->phc || !lif->phc->ptp) 80 return -EOPNOTSUPP; 81 82 mutex_lock(&lif->phc->config_lock); 83 84 if (new_ts) { 85 config = new_ts; 86 } else { 87 /* If called with new_ts == NULL, replay the previous request 88 * primarily for recovery after a FW_RESET. 89 * We saved the previous configuration request info, so copy 90 * the previous request for reference, clear the current state 91 * to match the device's reset state, and run with it. 92 */ 93 config = &ts; 94 memcpy(config, &lif->phc->ts_config, sizeof(*config)); 95 memset(&lif->phc->ts_config, 0, sizeof(lif->phc->ts_config)); 96 lif->phc->ts_config_tx_mode = 0; 97 lif->phc->ts_config_rx_filt = 0; 98 } 99 100 tx_mode = ionic_hwstamp_tx_mode(config->tx_type); 101 if (tx_mode < 0) { 102 err = tx_mode; 103 goto err_queues; 104 } 105 106 mask = cpu_to_le64(BIT_ULL(tx_mode)); 107 if ((ionic->ident.lif.eth.hwstamp_tx_modes & mask) != mask) { 108 err = -ERANGE; 109 goto err_queues; 110 } 111 112 rx_filt = ionic_hwstamp_rx_filt(config->rx_filter); 113 rx_all = config->rx_filter != HWTSTAMP_FILTER_NONE && !rx_filt; 114 115 mask = cpu_to_le64(rx_filt); 116 if ((ionic->ident.lif.eth.hwstamp_rx_filters & mask) != mask) { 117 rx_filt = 0; 118 rx_all = true; 119 config->rx_filter = HWTSTAMP_FILTER_ALL; 120 } 121 122 dev_dbg(ionic->dev, "%s: config_rx_filter %d rx_filt %#llx rx_all %d\n", 123 __func__, config->rx_filter, rx_filt, rx_all); 124 125 if (tx_mode) { 126 err = ionic_lif_create_hwstamp_txq(lif); 127 if (err) 128 goto err_queues; 129 } 130 131 if (rx_filt) { 132 err = ionic_lif_create_hwstamp_rxq(lif); 133 if (err) 134 goto err_queues; 135 } 136 137 if (tx_mode != lif->phc->ts_config_tx_mode) { 138 err = ionic_lif_set_hwstamp_txmode(lif, tx_mode); 139 if (err) 140 goto err_txmode; 141 } 142 143 if (rx_filt != lif->phc->ts_config_rx_filt) { 144 err = ionic_lif_set_hwstamp_rxfilt(lif, rx_filt); 145 if (err) 146 goto err_rxfilt; 147 } 148 149 if (rx_all != (lif->phc->ts_config.rx_filter == HWTSTAMP_FILTER_ALL)) { 150 err = ionic_lif_config_hwstamp_rxq_all(lif, rx_all); 151 if (err) 152 goto err_rxall; 153 } 154 155 memcpy(&lif->phc->ts_config, config, sizeof(*config)); 156 lif->phc->ts_config_rx_filt = rx_filt; 157 lif->phc->ts_config_tx_mode = tx_mode; 158 159 mutex_unlock(&lif->phc->config_lock); 160 161 return 0; 162 163err_rxall: 164 if (rx_filt != lif->phc->ts_config_rx_filt) { 165 rx_filt = lif->phc->ts_config_rx_filt; 166 err2 = ionic_lif_set_hwstamp_rxfilt(lif, rx_filt); 167 if (err2) 168 dev_err(ionic->dev, 169 "Failed to revert rx timestamp filter: %d\n", err2); 170 } 171err_rxfilt: 172 if (tx_mode != lif->phc->ts_config_tx_mode) { 173 tx_mode = lif->phc->ts_config_tx_mode; 174 err2 = ionic_lif_set_hwstamp_txmode(lif, tx_mode); 175 if (err2) 176 dev_err(ionic->dev, 177 "Failed to revert tx timestamp mode: %d\n", err2); 178 } 179err_txmode: 180 /* special queues remain allocated, just unused */ 181err_queues: 182 mutex_unlock(&lif->phc->config_lock); 183 return err; 184} 185 186int ionic_lif_hwstamp_set(struct ionic_lif *lif, struct ifreq *ifr) 187{ 188 struct hwtstamp_config config; 189 int err; 190 191 if (!lif->phc || !lif->phc->ptp) 192 return -EOPNOTSUPP; 193 194 if (copy_from_user(&config, ifr->ifr_data, sizeof(config))) 195 return -EFAULT; 196 197 mutex_lock(&lif->queue_lock); 198 err = ionic_lif_hwstamp_set_ts_config(lif, &config); 199 mutex_unlock(&lif->queue_lock); 200 if (err) { 201 netdev_info(lif->netdev, "hwstamp set failed: %d\n", err); 202 return err; 203 } 204 205 if (copy_to_user(ifr->ifr_data, &config, sizeof(config))) 206 return -EFAULT; 207 208 return 0; 209} 210 211void ionic_lif_hwstamp_replay(struct ionic_lif *lif) 212{ 213 int err; 214 215 if (!lif->phc || !lif->phc->ptp) 216 return; 217 218 mutex_lock(&lif->queue_lock); 219 err = ionic_lif_hwstamp_set_ts_config(lif, NULL); 220 mutex_unlock(&lif->queue_lock); 221 if (err) 222 netdev_info(lif->netdev, "hwstamp replay failed: %d\n", err); 223} 224 225void ionic_lif_hwstamp_recreate_queues(struct ionic_lif *lif) 226{ 227 int err; 228 229 if (!lif->phc || !lif->phc->ptp) 230 return; 231 232 mutex_lock(&lif->phc->config_lock); 233 234 if (lif->phc->ts_config_tx_mode) { 235 err = ionic_lif_create_hwstamp_txq(lif); 236 if (err) 237 netdev_info(lif->netdev, "hwstamp recreate txq failed: %d\n", err); 238 } 239 240 if (lif->phc->ts_config_rx_filt) { 241 err = ionic_lif_create_hwstamp_rxq(lif); 242 if (err) 243 netdev_info(lif->netdev, "hwstamp recreate rxq failed: %d\n", err); 244 } 245 246 mutex_unlock(&lif->phc->config_lock); 247} 248 249int ionic_lif_hwstamp_get(struct ionic_lif *lif, struct ifreq *ifr) 250{ 251 struct hwtstamp_config config; 252 253 if (!lif->phc || !lif->phc->ptp) 254 return -EOPNOTSUPP; 255 256 mutex_lock(&lif->phc->config_lock); 257 memcpy(&config, &lif->phc->ts_config, sizeof(config)); 258 mutex_unlock(&lif->phc->config_lock); 259 260 if (copy_to_user(ifr->ifr_data, &config, sizeof(config))) 261 return -EFAULT; 262 return 0; 263} 264 265static u64 ionic_hwstamp_read(struct ionic *ionic, 266 struct ptp_system_timestamp *sts) 267{ 268 u32 tick_high_before, tick_high, tick_low; 269 270 /* read and discard low part to defeat hw staging of high part */ 271 ioread32(&ionic->idev.hwstamp_regs->tick_low); 272 273 tick_high_before = ioread32(&ionic->idev.hwstamp_regs->tick_high); 274 275 ptp_read_system_prets(sts); 276 tick_low = ioread32(&ionic->idev.hwstamp_regs->tick_low); 277 ptp_read_system_postts(sts); 278 279 tick_high = ioread32(&ionic->idev.hwstamp_regs->tick_high); 280 281 /* If tick_high changed, re-read tick_low once more. Assume tick_high 282 * cannot change again so soon as in the span of re-reading tick_low. 283 */ 284 if (tick_high != tick_high_before) { 285 ptp_read_system_prets(sts); 286 tick_low = ioread32(&ionic->idev.hwstamp_regs->tick_low); 287 ptp_read_system_postts(sts); 288 } 289 290 return (u64)tick_low | ((u64)tick_high << 32); 291} 292 293static u64 ionic_cc_read(const struct cyclecounter *cc) 294{ 295 struct ionic_phc *phc = container_of(cc, struct ionic_phc, cc); 296 struct ionic *ionic = phc->lif->ionic; 297 298 return ionic_hwstamp_read(ionic, NULL); 299} 300 301static int ionic_setphc_cmd(struct ionic_phc *phc, struct ionic_admin_ctx *ctx) 302{ 303 ctx->work = COMPLETION_INITIALIZER_ONSTACK(ctx->work); 304 305 ctx->cmd.lif_setphc.opcode = IONIC_CMD_LIF_SETPHC; 306 ctx->cmd.lif_setphc.lif_index = cpu_to_le16(phc->lif->index); 307 308 ctx->cmd.lif_setphc.tick = cpu_to_le64(phc->tc.cycle_last); 309 ctx->cmd.lif_setphc.nsec = cpu_to_le64(phc->tc.nsec); 310 ctx->cmd.lif_setphc.frac = cpu_to_le64(phc->tc.frac); 311 ctx->cmd.lif_setphc.mult = cpu_to_le32(phc->cc.mult); 312 ctx->cmd.lif_setphc.shift = cpu_to_le32(phc->cc.shift); 313 314 return ionic_adminq_post(phc->lif, ctx); 315} 316 317static int ionic_phc_adjfine(struct ptp_clock_info *info, long scaled_ppm) 318{ 319 struct ionic_phc *phc = container_of(info, struct ionic_phc, ptp_info); 320 struct ionic_admin_ctx ctx = {}; 321 unsigned long irqflags; 322 s64 adj; 323 int err; 324 325 /* Reject phc adjustments during device upgrade */ 326 if (test_bit(IONIC_LIF_F_FW_RESET, phc->lif->state)) 327 return -EBUSY; 328 329 /* Adjustment value scaled by 2^16 million */ 330 adj = (s64)scaled_ppm * phc->init_cc_mult; 331 332 /* Adjustment value to scale */ 333 adj /= (s64)SCALED_PPM; 334 335 /* Final adjusted multiplier */ 336 adj += phc->init_cc_mult; 337 338 spin_lock_irqsave(&phc->lock, irqflags); 339 340 /* update the point-in-time basis to now, before adjusting the rate */ 341 timecounter_read(&phc->tc); 342 phc->cc.mult = adj; 343 344 /* Setphc commands are posted in-order, sequenced by phc->lock. We 345 * need to drop the lock before waiting for the command to complete. 346 */ 347 err = ionic_setphc_cmd(phc, &ctx); 348 349 spin_unlock_irqrestore(&phc->lock, irqflags); 350 351 return ionic_adminq_wait(phc->lif, &ctx, err, true); 352} 353 354static int ionic_phc_adjtime(struct ptp_clock_info *info, s64 delta) 355{ 356 struct ionic_phc *phc = container_of(info, struct ionic_phc, ptp_info); 357 struct ionic_admin_ctx ctx = {}; 358 unsigned long irqflags; 359 int err; 360 361 /* Reject phc adjustments during device upgrade */ 362 if (test_bit(IONIC_LIF_F_FW_RESET, phc->lif->state)) 363 return -EBUSY; 364 365 spin_lock_irqsave(&phc->lock, irqflags); 366 367 timecounter_adjtime(&phc->tc, delta); 368 369 /* Setphc commands are posted in-order, sequenced by phc->lock. We 370 * need to drop the lock before waiting for the command to complete. 371 */ 372 err = ionic_setphc_cmd(phc, &ctx); 373 374 spin_unlock_irqrestore(&phc->lock, irqflags); 375 376 return ionic_adminq_wait(phc->lif, &ctx, err, true); 377} 378 379static int ionic_phc_settime64(struct ptp_clock_info *info, 380 const struct timespec64 *ts) 381{ 382 struct ionic_phc *phc = container_of(info, struct ionic_phc, ptp_info); 383 struct ionic_admin_ctx ctx = {}; 384 unsigned long irqflags; 385 int err; 386 u64 ns; 387 388 /* Reject phc adjustments during device upgrade */ 389 if (test_bit(IONIC_LIF_F_FW_RESET, phc->lif->state)) 390 return -EBUSY; 391 392 ns = timespec64_to_ns(ts); 393 394 spin_lock_irqsave(&phc->lock, irqflags); 395 396 timecounter_init(&phc->tc, &phc->cc, ns); 397 398 /* Setphc commands are posted in-order, sequenced by phc->lock. We 399 * need to drop the lock before waiting for the command to complete. 400 */ 401 err = ionic_setphc_cmd(phc, &ctx); 402 403 spin_unlock_irqrestore(&phc->lock, irqflags); 404 405 return ionic_adminq_wait(phc->lif, &ctx, err, true); 406} 407 408static int ionic_phc_gettimex64(struct ptp_clock_info *info, 409 struct timespec64 *ts, 410 struct ptp_system_timestamp *sts) 411{ 412 struct ionic_phc *phc = container_of(info, struct ionic_phc, ptp_info); 413 struct ionic *ionic = phc->lif->ionic; 414 unsigned long irqflags; 415 u64 tick, ns; 416 417 /* Do not attempt to read device time during upgrade */ 418 if (test_bit(IONIC_LIF_F_FW_RESET, phc->lif->state)) 419 return -EBUSY; 420 421 spin_lock_irqsave(&phc->lock, irqflags); 422 423 tick = ionic_hwstamp_read(ionic, sts); 424 425 ns = timecounter_cyc2time(&phc->tc, tick); 426 427 spin_unlock_irqrestore(&phc->lock, irqflags); 428 429 *ts = ns_to_timespec64(ns); 430 431 return 0; 432} 433 434static long ionic_phc_aux_work(struct ptp_clock_info *info) 435{ 436 struct ionic_phc *phc = container_of(info, struct ionic_phc, ptp_info); 437 struct ionic_admin_ctx ctx = {}; 438 unsigned long irqflags; 439 int err; 440 441 /* Do not update phc during device upgrade, but keep polling to resume 442 * after upgrade. Since we don't update the point in time basis, there 443 * is no expectation that we are maintaining the phc time during the 444 * upgrade. After upgrade, it will need to be readjusted back to the 445 * correct time by the ptp daemon. 446 */ 447 if (test_bit(IONIC_LIF_F_FW_RESET, phc->lif->state)) 448 return phc->aux_work_delay; 449 450 spin_lock_irqsave(&phc->lock, irqflags); 451 452 /* update point-in-time basis to now */ 453 timecounter_read(&phc->tc); 454 455 /* Setphc commands are posted in-order, sequenced by phc->lock. We 456 * need to drop the lock before waiting for the command to complete. 457 */ 458 err = ionic_setphc_cmd(phc, &ctx); 459 460 spin_unlock_irqrestore(&phc->lock, irqflags); 461 462 ionic_adminq_wait(phc->lif, &ctx, err, true); 463 464 return phc->aux_work_delay; 465} 466 467ktime_t ionic_lif_phc_ktime(struct ionic_lif *lif, u64 tick) 468{ 469 unsigned long irqflags; 470 u64 ns; 471 472 if (!lif->phc) 473 return 0; 474 475 spin_lock_irqsave(&lif->phc->lock, irqflags); 476 ns = timecounter_cyc2time(&lif->phc->tc, tick); 477 spin_unlock_irqrestore(&lif->phc->lock, irqflags); 478 479 return ns_to_ktime(ns); 480} 481 482static const struct ptp_clock_info ionic_ptp_info = { 483 .owner = THIS_MODULE, 484 .name = "ionic_ptp", 485 .adjfine = ionic_phc_adjfine, 486 .adjtime = ionic_phc_adjtime, 487 .gettimex64 = ionic_phc_gettimex64, 488 .settime64 = ionic_phc_settime64, 489 .do_aux_work = ionic_phc_aux_work, 490}; 491 492void ionic_lif_register_phc(struct ionic_lif *lif) 493{ 494 if (!lif->phc || !(lif->hw_features & IONIC_ETH_HW_TIMESTAMP)) 495 return; 496 497 lif->phc->ptp = ptp_clock_register(&lif->phc->ptp_info, lif->ionic->dev); 498 499 if (IS_ERR(lif->phc->ptp)) { 500 dev_warn(lif->ionic->dev, "Cannot register phc device: %ld\n", 501 PTR_ERR(lif->phc->ptp)); 502 503 lif->phc->ptp = NULL; 504 } 505 506 if (lif->phc->ptp) 507 ptp_schedule_worker(lif->phc->ptp, lif->phc->aux_work_delay); 508} 509 510void ionic_lif_unregister_phc(struct ionic_lif *lif) 511{ 512 if (!lif->phc || !lif->phc->ptp) 513 return; 514 515 ptp_clock_unregister(lif->phc->ptp); 516 517 lif->phc->ptp = NULL; 518} 519 520void ionic_lif_alloc_phc(struct ionic_lif *lif) 521{ 522 struct ionic *ionic = lif->ionic; 523 struct ionic_phc *phc; 524 u64 delay, diff, mult; 525 u64 frac = 0; 526 u64 features; 527 u32 shift; 528 529 if (!ionic->idev.hwstamp_regs) 530 return; 531 532 features = le64_to_cpu(ionic->ident.lif.eth.config.features); 533 if (!(features & IONIC_ETH_HW_TIMESTAMP)) 534 return; 535 536 phc = devm_kzalloc(ionic->dev, sizeof(*phc), GFP_KERNEL); 537 if (!phc) 538 return; 539 540 phc->lif = lif; 541 542 phc->cc.read = ionic_cc_read; 543 phc->cc.mask = le64_to_cpu(ionic->ident.dev.hwstamp_mask); 544 phc->cc.mult = le32_to_cpu(ionic->ident.dev.hwstamp_mult); 545 phc->cc.shift = le32_to_cpu(ionic->ident.dev.hwstamp_shift); 546 547 if (!phc->cc.mult) { 548 dev_err(lif->ionic->dev, 549 "Invalid device PHC mask multiplier %u, disabling HW timestamp support\n", 550 phc->cc.mult); 551 devm_kfree(lif->ionic->dev, phc); 552 lif->phc = NULL; 553 return; 554 } 555 556 dev_dbg(lif->ionic->dev, "Device PHC mask %#llx mult %u shift %u\n", 557 phc->cc.mask, phc->cc.mult, phc->cc.shift); 558 559 spin_lock_init(&phc->lock); 560 mutex_init(&phc->config_lock); 561 562 /* max ticks is limited by the multiplier, or by the update period. */ 563 if (phc->cc.shift + 2 + ilog2(IONIC_PHC_UPDATE_NS) >= 64) { 564 /* max ticks that do not overflow when multiplied by max 565 * adjusted multiplier (twice the initial multiplier) 566 */ 567 diff = U64_MAX / phc->cc.mult / 2; 568 } else { 569 /* approx ticks at four times the update period */ 570 diff = (u64)IONIC_PHC_UPDATE_NS << (phc->cc.shift + 2); 571 diff = DIV_ROUND_UP(diff, phc->cc.mult); 572 } 573 574 /* transform to bitmask */ 575 diff |= diff >> 1; 576 diff |= diff >> 2; 577 diff |= diff >> 4; 578 diff |= diff >> 8; 579 diff |= diff >> 16; 580 diff |= diff >> 32; 581 582 /* constrain to the hardware bitmask */ 583 diff &= phc->cc.mask; 584 585 /* the wrap period is now defined by diff 586 * 587 * we will update the time basis at about 1/4 the wrap period, so 588 * should not see a difference of more than +/- diff/4. 589 * 590 * this is sufficient not see a difference of more than +/- diff/2, as 591 * required by timecounter_cyc2time, to detect an old time stamp. 592 * 593 * adjust the initial multiplier, being careful to avoid overflow: 594 * - do not overflow 63 bits: init_cc_mult * SCALED_PPM 595 * - do not overflow 64 bits: max_mult * (diff / 2) 596 * 597 * we want to increase the initial multiplier as much as possible, to 598 * allow for more precise adjustment in ionic_phc_adjfine. 599 * 600 * only adjust the multiplier if we can double it or more. 601 */ 602 mult = U64_MAX / 2 / max(diff / 2, SCALED_PPM); 603 shift = mult / phc->cc.mult; 604 if (shift >= 2) { 605 /* initial multiplier will be 2^n of hardware cc.mult */ 606 shift = fls(shift); 607 /* increase cc.mult and cc.shift by the same 2^n and n. */ 608 phc->cc.mult <<= shift; 609 phc->cc.shift += shift; 610 } 611 612 dev_dbg(lif->ionic->dev, "Initial PHC mask %#llx mult %u shift %u\n", 613 phc->cc.mask, phc->cc.mult, phc->cc.shift); 614 615 /* frequency adjustments are relative to the initial multiplier */ 616 phc->init_cc_mult = phc->cc.mult; 617 618 timecounter_init(&phc->tc, &phc->cc, ktime_get_real_ns()); 619 620 /* Update cycle_last at 1/4 the wrap period, or IONIC_PHC_UPDATE_NS */ 621 delay = min_t(u64, IONIC_PHC_UPDATE_NS, 622 cyclecounter_cyc2ns(&phc->cc, diff / 4, 0, &frac)); 623 dev_dbg(lif->ionic->dev, "Work delay %llu ms\n", delay / NSEC_PER_MSEC); 624 625 phc->aux_work_delay = nsecs_to_jiffies(delay); 626 627 phc->ptp_info = ionic_ptp_info; 628 629 /* We have allowed to adjust the multiplier up to +/- 1 part per 1. 630 * Here expressed as NORMAL_PPB (1 billion parts per billion). 631 */ 632 phc->ptp_info.max_adj = NORMAL_PPB; 633 634 lif->phc = phc; 635} 636 637void ionic_lif_free_phc(struct ionic_lif *lif) 638{ 639 if (!lif->phc) 640 return; 641 642 mutex_destroy(&lif->phc->config_lock); 643 644 devm_kfree(lif->ionic->dev, lif->phc); 645 lif->phc = NULL; 646} 647