1// SPDX-License-Identifier: GPL-2.0 2/* Copyright (c) 2019 Intel Corporation */ 3 4#include "igc.h" 5 6#include <linux/module.h> 7#include <linux/device.h> 8#include <linux/pci.h> 9#include <linux/ptp_classify.h> 10#include <linux/clocksource.h> 11#include <linux/ktime.h> 12#include <linux/delay.h> 13#include <linux/iopoll.h> 14 15#define INCVALUE_MASK 0x7fffffff 16#define ISGN 0x80000000 17 18#define IGC_PTP_TX_TIMEOUT (HZ * 15) 19 20#define IGC_PTM_STAT_SLEEP 2 21#define IGC_PTM_STAT_TIMEOUT 100 22 23/* SYSTIM read access for I225 */ 24void igc_ptp_read(struct igc_adapter *adapter, struct timespec64 *ts) 25{ 26 struct igc_hw *hw = &adapter->hw; 27 u32 sec, nsec; 28 29 /* The timestamp is latched when SYSTIML is read. */ 30 nsec = rd32(IGC_SYSTIML); 31 sec = rd32(IGC_SYSTIMH); 32 33 ts->tv_sec = sec; 34 ts->tv_nsec = nsec; 35} 36 37static void igc_ptp_write_i225(struct igc_adapter *adapter, 38 const struct timespec64 *ts) 39{ 40 struct igc_hw *hw = &adapter->hw; 41 42 wr32(IGC_SYSTIML, ts->tv_nsec); 43 wr32(IGC_SYSTIMH, ts->tv_sec); 44} 45 46static int igc_ptp_adjfine_i225(struct ptp_clock_info *ptp, long scaled_ppm) 47{ 48 struct igc_adapter *igc = container_of(ptp, struct igc_adapter, 49 ptp_caps); 50 struct igc_hw *hw = &igc->hw; 51 int neg_adj = 0; 52 u64 rate; 53 u32 inca; 54 55 if (scaled_ppm < 0) { 56 neg_adj = 1; 57 scaled_ppm = -scaled_ppm; 58 } 59 rate = scaled_ppm; 60 rate <<= 14; 61 rate = div_u64(rate, 78125); 62 63 inca = rate & INCVALUE_MASK; 64 if (neg_adj) 65 inca |= ISGN; 66 67 wr32(IGC_TIMINCA, inca); 68 69 return 0; 70} 71 72static int igc_ptp_adjtime_i225(struct ptp_clock_info *ptp, s64 delta) 73{ 74 struct igc_adapter *igc = container_of(ptp, struct igc_adapter, 75 ptp_caps); 76 struct timespec64 now, then = ns_to_timespec64(delta); 77 unsigned long flags; 78 79 spin_lock_irqsave(&igc->tmreg_lock, flags); 80 81 igc_ptp_read(igc, &now); 82 now = timespec64_add(now, then); 83 igc_ptp_write_i225(igc, (const struct timespec64 *)&now); 84 85 spin_unlock_irqrestore(&igc->tmreg_lock, flags); 86 87 return 0; 88} 89 90static int igc_ptp_gettimex64_i225(struct ptp_clock_info *ptp, 91 struct timespec64 *ts, 92 struct ptp_system_timestamp *sts) 93{ 94 struct igc_adapter *igc = container_of(ptp, struct igc_adapter, 95 ptp_caps); 96 struct igc_hw *hw = &igc->hw; 97 unsigned long flags; 98 99 spin_lock_irqsave(&igc->tmreg_lock, flags); 100 101 ptp_read_system_prets(sts); 102 ts->tv_nsec = rd32(IGC_SYSTIML); 103 ts->tv_sec = rd32(IGC_SYSTIMH); 104 ptp_read_system_postts(sts); 105 106 spin_unlock_irqrestore(&igc->tmreg_lock, flags); 107 108 return 0; 109} 110 111static int igc_ptp_settime_i225(struct ptp_clock_info *ptp, 112 const struct timespec64 *ts) 113{ 114 struct igc_adapter *igc = container_of(ptp, struct igc_adapter, 115 ptp_caps); 116 unsigned long flags; 117 118 spin_lock_irqsave(&igc->tmreg_lock, flags); 119 120 igc_ptp_write_i225(igc, ts); 121 122 spin_unlock_irqrestore(&igc->tmreg_lock, flags); 123 124 return 0; 125} 126 127static void igc_pin_direction(int pin, int input, u32 *ctrl, u32 *ctrl_ext) 128{ 129 u32 *ptr = pin < 2 ? ctrl : ctrl_ext; 130 static const u32 mask[IGC_N_SDP] = { 131 IGC_CTRL_SDP0_DIR, 132 IGC_CTRL_SDP1_DIR, 133 IGC_CTRL_EXT_SDP2_DIR, 134 IGC_CTRL_EXT_SDP3_DIR, 135 }; 136 137 if (input) 138 *ptr &= ~mask[pin]; 139 else 140 *ptr |= mask[pin]; 141} 142 143static void igc_pin_perout(struct igc_adapter *igc, int chan, int pin, int freq) 144{ 145 static const u32 igc_aux0_sel_sdp[IGC_N_SDP] = { 146 IGC_AUX0_SEL_SDP0, IGC_AUX0_SEL_SDP1, IGC_AUX0_SEL_SDP2, IGC_AUX0_SEL_SDP3, 147 }; 148 static const u32 igc_aux1_sel_sdp[IGC_N_SDP] = { 149 IGC_AUX1_SEL_SDP0, IGC_AUX1_SEL_SDP1, IGC_AUX1_SEL_SDP2, IGC_AUX1_SEL_SDP3, 150 }; 151 static const u32 igc_ts_sdp_en[IGC_N_SDP] = { 152 IGC_TS_SDP0_EN, IGC_TS_SDP1_EN, IGC_TS_SDP2_EN, IGC_TS_SDP3_EN, 153 }; 154 static const u32 igc_ts_sdp_sel_tt0[IGC_N_SDP] = { 155 IGC_TS_SDP0_SEL_TT0, IGC_TS_SDP1_SEL_TT0, 156 IGC_TS_SDP2_SEL_TT0, IGC_TS_SDP3_SEL_TT0, 157 }; 158 static const u32 igc_ts_sdp_sel_tt1[IGC_N_SDP] = { 159 IGC_TS_SDP0_SEL_TT1, IGC_TS_SDP1_SEL_TT1, 160 IGC_TS_SDP2_SEL_TT1, IGC_TS_SDP3_SEL_TT1, 161 }; 162 static const u32 igc_ts_sdp_sel_fc0[IGC_N_SDP] = { 163 IGC_TS_SDP0_SEL_FC0, IGC_TS_SDP1_SEL_FC0, 164 IGC_TS_SDP2_SEL_FC0, IGC_TS_SDP3_SEL_FC0, 165 }; 166 static const u32 igc_ts_sdp_sel_fc1[IGC_N_SDP] = { 167 IGC_TS_SDP0_SEL_FC1, IGC_TS_SDP1_SEL_FC1, 168 IGC_TS_SDP2_SEL_FC1, IGC_TS_SDP3_SEL_FC1, 169 }; 170 static const u32 igc_ts_sdp_sel_clr[IGC_N_SDP] = { 171 IGC_TS_SDP0_SEL_FC1, IGC_TS_SDP1_SEL_FC1, 172 IGC_TS_SDP2_SEL_FC1, IGC_TS_SDP3_SEL_FC1, 173 }; 174 struct igc_hw *hw = &igc->hw; 175 u32 ctrl, ctrl_ext, tssdp = 0; 176 177 ctrl = rd32(IGC_CTRL); 178 ctrl_ext = rd32(IGC_CTRL_EXT); 179 tssdp = rd32(IGC_TSSDP); 180 181 igc_pin_direction(pin, 0, &ctrl, &ctrl_ext); 182 183 /* Make sure this pin is not enabled as an input. */ 184 if ((tssdp & IGC_AUX0_SEL_SDP3) == igc_aux0_sel_sdp[pin]) 185 tssdp &= ~IGC_AUX0_TS_SDP_EN; 186 187 if ((tssdp & IGC_AUX1_SEL_SDP3) == igc_aux1_sel_sdp[pin]) 188 tssdp &= ~IGC_AUX1_TS_SDP_EN; 189 190 tssdp &= ~igc_ts_sdp_sel_clr[pin]; 191 if (freq) { 192 if (chan == 1) 193 tssdp |= igc_ts_sdp_sel_fc1[pin]; 194 else 195 tssdp |= igc_ts_sdp_sel_fc0[pin]; 196 } else { 197 if (chan == 1) 198 tssdp |= igc_ts_sdp_sel_tt1[pin]; 199 else 200 tssdp |= igc_ts_sdp_sel_tt0[pin]; 201 } 202 tssdp |= igc_ts_sdp_en[pin]; 203 204 wr32(IGC_TSSDP, tssdp); 205 wr32(IGC_CTRL, ctrl); 206 wr32(IGC_CTRL_EXT, ctrl_ext); 207} 208 209static void igc_pin_extts(struct igc_adapter *igc, int chan, int pin) 210{ 211 static const u32 igc_aux0_sel_sdp[IGC_N_SDP] = { 212 IGC_AUX0_SEL_SDP0, IGC_AUX0_SEL_SDP1, IGC_AUX0_SEL_SDP2, IGC_AUX0_SEL_SDP3, 213 }; 214 static const u32 igc_aux1_sel_sdp[IGC_N_SDP] = { 215 IGC_AUX1_SEL_SDP0, IGC_AUX1_SEL_SDP1, IGC_AUX1_SEL_SDP2, IGC_AUX1_SEL_SDP3, 216 }; 217 static const u32 igc_ts_sdp_en[IGC_N_SDP] = { 218 IGC_TS_SDP0_EN, IGC_TS_SDP1_EN, IGC_TS_SDP2_EN, IGC_TS_SDP3_EN, 219 }; 220 struct igc_hw *hw = &igc->hw; 221 u32 ctrl, ctrl_ext, tssdp = 0; 222 223 ctrl = rd32(IGC_CTRL); 224 ctrl_ext = rd32(IGC_CTRL_EXT); 225 tssdp = rd32(IGC_TSSDP); 226 227 igc_pin_direction(pin, 1, &ctrl, &ctrl_ext); 228 229 /* Make sure this pin is not enabled as an output. */ 230 tssdp &= ~igc_ts_sdp_en[pin]; 231 232 if (chan == 1) { 233 tssdp &= ~IGC_AUX1_SEL_SDP3; 234 tssdp |= igc_aux1_sel_sdp[pin] | IGC_AUX1_TS_SDP_EN; 235 } else { 236 tssdp &= ~IGC_AUX0_SEL_SDP3; 237 tssdp |= igc_aux0_sel_sdp[pin] | IGC_AUX0_TS_SDP_EN; 238 } 239 240 wr32(IGC_TSSDP, tssdp); 241 wr32(IGC_CTRL, ctrl); 242 wr32(IGC_CTRL_EXT, ctrl_ext); 243} 244 245static int igc_ptp_feature_enable_i225(struct ptp_clock_info *ptp, 246 struct ptp_clock_request *rq, int on) 247{ 248 struct igc_adapter *igc = 249 container_of(ptp, struct igc_adapter, ptp_caps); 250 struct igc_hw *hw = &igc->hw; 251 unsigned long flags; 252 struct timespec64 ts; 253 int use_freq = 0, pin = -1; 254 u32 tsim, tsauxc, tsauxc_mask, tsim_mask, trgttiml, trgttimh, freqout; 255 s64 ns; 256 257 switch (rq->type) { 258 case PTP_CLK_REQ_EXTTS: 259 /* Reject requests with unsupported flags */ 260 if (rq->extts.flags & ~(PTP_ENABLE_FEATURE | 261 PTP_RISING_EDGE | 262 PTP_FALLING_EDGE | 263 PTP_STRICT_FLAGS)) 264 return -EOPNOTSUPP; 265 266 /* Reject requests failing to enable both edges. */ 267 if ((rq->extts.flags & PTP_STRICT_FLAGS) && 268 (rq->extts.flags & PTP_ENABLE_FEATURE) && 269 (rq->extts.flags & PTP_EXTTS_EDGES) != PTP_EXTTS_EDGES) 270 return -EOPNOTSUPP; 271 272 if (on) { 273 pin = ptp_find_pin(igc->ptp_clock, PTP_PF_EXTTS, 274 rq->extts.index); 275 if (pin < 0) 276 return -EBUSY; 277 } 278 if (rq->extts.index == 1) { 279 tsauxc_mask = IGC_TSAUXC_EN_TS1; 280 tsim_mask = IGC_TSICR_AUTT1; 281 } else { 282 tsauxc_mask = IGC_TSAUXC_EN_TS0; 283 tsim_mask = IGC_TSICR_AUTT0; 284 } 285 spin_lock_irqsave(&igc->tmreg_lock, flags); 286 tsauxc = rd32(IGC_TSAUXC); 287 tsim = rd32(IGC_TSIM); 288 if (on) { 289 igc_pin_extts(igc, rq->extts.index, pin); 290 tsauxc |= tsauxc_mask; 291 tsim |= tsim_mask; 292 } else { 293 tsauxc &= ~tsauxc_mask; 294 tsim &= ~tsim_mask; 295 } 296 wr32(IGC_TSAUXC, tsauxc); 297 wr32(IGC_TSIM, tsim); 298 spin_unlock_irqrestore(&igc->tmreg_lock, flags); 299 return 0; 300 301 case PTP_CLK_REQ_PEROUT: 302 /* Reject requests with unsupported flags */ 303 if (rq->perout.flags) 304 return -EOPNOTSUPP; 305 306 if (on) { 307 pin = ptp_find_pin(igc->ptp_clock, PTP_PF_PEROUT, 308 rq->perout.index); 309 if (pin < 0) 310 return -EBUSY; 311 } 312 ts.tv_sec = rq->perout.period.sec; 313 ts.tv_nsec = rq->perout.period.nsec; 314 ns = timespec64_to_ns(&ts); 315 ns = ns >> 1; 316 if (on && (ns <= 70000000LL || ns == 125000000LL || 317 ns == 250000000LL || ns == 500000000LL)) { 318 if (ns < 8LL) 319 return -EINVAL; 320 use_freq = 1; 321 } 322 ts = ns_to_timespec64(ns); 323 if (rq->perout.index == 1) { 324 if (use_freq) { 325 tsauxc_mask = IGC_TSAUXC_EN_CLK1 | IGC_TSAUXC_ST1; 326 tsim_mask = 0; 327 } else { 328 tsauxc_mask = IGC_TSAUXC_EN_TT1; 329 tsim_mask = IGC_TSICR_TT1; 330 } 331 trgttiml = IGC_TRGTTIML1; 332 trgttimh = IGC_TRGTTIMH1; 333 freqout = IGC_FREQOUT1; 334 } else { 335 if (use_freq) { 336 tsauxc_mask = IGC_TSAUXC_EN_CLK0 | IGC_TSAUXC_ST0; 337 tsim_mask = 0; 338 } else { 339 tsauxc_mask = IGC_TSAUXC_EN_TT0; 340 tsim_mask = IGC_TSICR_TT0; 341 } 342 trgttiml = IGC_TRGTTIML0; 343 trgttimh = IGC_TRGTTIMH0; 344 freqout = IGC_FREQOUT0; 345 } 346 spin_lock_irqsave(&igc->tmreg_lock, flags); 347 tsauxc = rd32(IGC_TSAUXC); 348 tsim = rd32(IGC_TSIM); 349 if (rq->perout.index == 1) { 350 tsauxc &= ~(IGC_TSAUXC_EN_TT1 | IGC_TSAUXC_EN_CLK1 | 351 IGC_TSAUXC_ST1); 352 tsim &= ~IGC_TSICR_TT1; 353 } else { 354 tsauxc &= ~(IGC_TSAUXC_EN_TT0 | IGC_TSAUXC_EN_CLK0 | 355 IGC_TSAUXC_ST0); 356 tsim &= ~IGC_TSICR_TT0; 357 } 358 if (on) { 359 struct timespec64 safe_start; 360 int i = rq->perout.index; 361 362 igc_pin_perout(igc, i, pin, use_freq); 363 igc_ptp_read(igc, &safe_start); 364 365 /* PPS output start time is triggered by Target time(TT) 366 * register. Programming any past time value into TT 367 * register will cause PPS to never start. Need to make 368 * sure we program the TT register a time ahead in 369 * future. There isn't a stringent need to fire PPS out 370 * right away. Adding +2 seconds should take care of 371 * corner cases. Let's say if the SYSTIML is close to 372 * wrap up and the timer keeps ticking as we program the 373 * register, adding +2seconds is safe bet. 374 */ 375 safe_start.tv_sec += 2; 376 377 if (rq->perout.start.sec < safe_start.tv_sec) 378 igc->perout[i].start.tv_sec = safe_start.tv_sec; 379 else 380 igc->perout[i].start.tv_sec = rq->perout.start.sec; 381 igc->perout[i].start.tv_nsec = rq->perout.start.nsec; 382 igc->perout[i].period.tv_sec = ts.tv_sec; 383 igc->perout[i].period.tv_nsec = ts.tv_nsec; 384 wr32(trgttimh, (u32)igc->perout[i].start.tv_sec); 385 /* For now, always select timer 0 as source. */ 386 wr32(trgttiml, (u32)(igc->perout[i].start.tv_nsec | 387 IGC_TT_IO_TIMER_SEL_SYSTIM0)); 388 if (use_freq) 389 wr32(freqout, ns); 390 tsauxc |= tsauxc_mask; 391 tsim |= tsim_mask; 392 } 393 wr32(IGC_TSAUXC, tsauxc); 394 wr32(IGC_TSIM, tsim); 395 spin_unlock_irqrestore(&igc->tmreg_lock, flags); 396 return 0; 397 398 case PTP_CLK_REQ_PPS: 399 spin_lock_irqsave(&igc->tmreg_lock, flags); 400 tsim = rd32(IGC_TSIM); 401 if (on) 402 tsim |= IGC_TSICR_SYS_WRAP; 403 else 404 tsim &= ~IGC_TSICR_SYS_WRAP; 405 igc->pps_sys_wrap_on = on; 406 wr32(IGC_TSIM, tsim); 407 spin_unlock_irqrestore(&igc->tmreg_lock, flags); 408 return 0; 409 410 default: 411 break; 412 } 413 414 return -EOPNOTSUPP; 415} 416 417static int igc_ptp_verify_pin(struct ptp_clock_info *ptp, unsigned int pin, 418 enum ptp_pin_function func, unsigned int chan) 419{ 420 switch (func) { 421 case PTP_PF_NONE: 422 case PTP_PF_EXTTS: 423 case PTP_PF_PEROUT: 424 break; 425 case PTP_PF_PHYSYNC: 426 return -1; 427 } 428 return 0; 429} 430 431/** 432 * igc_ptp_systim_to_hwtstamp - convert system time value to HW timestamp 433 * @adapter: board private structure 434 * @hwtstamps: timestamp structure to update 435 * @systim: unsigned 64bit system time value 436 * 437 * We need to convert the system time value stored in the RX/TXSTMP registers 438 * into a hwtstamp which can be used by the upper level timestamping functions. 439 * 440 * Returns 0 on success. 441 **/ 442static int igc_ptp_systim_to_hwtstamp(struct igc_adapter *adapter, 443 struct skb_shared_hwtstamps *hwtstamps, 444 u64 systim) 445{ 446 switch (adapter->hw.mac.type) { 447 case igc_i225: 448 memset(hwtstamps, 0, sizeof(*hwtstamps)); 449 /* Upper 32 bits contain s, lower 32 bits contain ns. */ 450 hwtstamps->hwtstamp = ktime_set(systim >> 32, 451 systim & 0xFFFFFFFF); 452 break; 453 default: 454 return -EINVAL; 455 } 456 return 0; 457} 458 459/** 460 * igc_ptp_rx_pktstamp - Retrieve timestamp from Rx packet buffer 461 * @adapter: Pointer to adapter the packet buffer belongs to 462 * @buf: Pointer to packet buffer 463 * 464 * This function retrieves the timestamp saved in the beginning of packet 465 * buffer. While two timestamps are available, one in timer0 reference and the 466 * other in timer1 reference, this function considers only the timestamp in 467 * timer0 reference. 468 * 469 * Returns timestamp value. 470 */ 471ktime_t igc_ptp_rx_pktstamp(struct igc_adapter *adapter, __le32 *buf) 472{ 473 ktime_t timestamp; 474 u32 secs, nsecs; 475 int adjust; 476 477 /* Timestamps are saved in little endian at the beginning of the packet 478 * buffer following the layout: 479 * 480 * DWORD: | 0 | 1 | 2 | 3 | 481 * Field: | Timer1 SYSTIML | Timer1 SYSTIMH | Timer0 SYSTIML | Timer0 SYSTIMH | 482 * 483 * SYSTIML holds the nanoseconds part while SYSTIMH holds the seconds 484 * part of the timestamp. 485 */ 486 nsecs = le32_to_cpu(buf[2]); 487 secs = le32_to_cpu(buf[3]); 488 489 timestamp = ktime_set(secs, nsecs); 490 491 /* Adjust timestamp for the RX latency based on link speed */ 492 switch (adapter->link_speed) { 493 case SPEED_10: 494 adjust = IGC_I225_RX_LATENCY_10; 495 break; 496 case SPEED_100: 497 adjust = IGC_I225_RX_LATENCY_100; 498 break; 499 case SPEED_1000: 500 adjust = IGC_I225_RX_LATENCY_1000; 501 break; 502 case SPEED_2500: 503 adjust = IGC_I225_RX_LATENCY_2500; 504 break; 505 default: 506 adjust = 0; 507 netdev_warn_once(adapter->netdev, "Imprecise timestamp\n"); 508 break; 509 } 510 511 return ktime_sub_ns(timestamp, adjust); 512} 513 514static void igc_ptp_disable_rx_timestamp(struct igc_adapter *adapter) 515{ 516 struct igc_hw *hw = &adapter->hw; 517 u32 val; 518 int i; 519 520 wr32(IGC_TSYNCRXCTL, 0); 521 522 for (i = 0; i < adapter->num_rx_queues; i++) { 523 val = rd32(IGC_SRRCTL(i)); 524 val &= ~IGC_SRRCTL_TIMESTAMP; 525 wr32(IGC_SRRCTL(i), val); 526 } 527 528 val = rd32(IGC_RXPBS); 529 val &= ~IGC_RXPBS_CFG_TS_EN; 530 wr32(IGC_RXPBS, val); 531} 532 533static void igc_ptp_enable_rx_timestamp(struct igc_adapter *adapter) 534{ 535 struct igc_hw *hw = &adapter->hw; 536 u32 val; 537 int i; 538 539 val = rd32(IGC_RXPBS); 540 val |= IGC_RXPBS_CFG_TS_EN; 541 wr32(IGC_RXPBS, val); 542 543 for (i = 0; i < adapter->num_rx_queues; i++) { 544 val = rd32(IGC_SRRCTL(i)); 545 /* FIXME: For now, only support retrieving RX timestamps from 546 * timer 0. 547 */ 548 val |= IGC_SRRCTL_TIMER1SEL(0) | IGC_SRRCTL_TIMER0SEL(0) | 549 IGC_SRRCTL_TIMESTAMP; 550 wr32(IGC_SRRCTL(i), val); 551 } 552 553 val = IGC_TSYNCRXCTL_ENABLED | IGC_TSYNCRXCTL_TYPE_ALL | 554 IGC_TSYNCRXCTL_RXSYNSIG; 555 wr32(IGC_TSYNCRXCTL, val); 556} 557 558static void igc_ptp_clear_tx_tstamp(struct igc_adapter *adapter) 559{ 560 unsigned long flags; 561 int i; 562 563 spin_lock_irqsave(&adapter->ptp_tx_lock, flags); 564 565 for (i = 0; i < IGC_MAX_TX_TSTAMP_REGS; i++) { 566 struct igc_tx_timestamp_request *tstamp = &adapter->tx_tstamp[i]; 567 568 dev_kfree_skb_any(tstamp->skb); 569 tstamp->skb = NULL; 570 } 571 572 spin_unlock_irqrestore(&adapter->ptp_tx_lock, flags); 573} 574 575static void igc_ptp_disable_tx_timestamp(struct igc_adapter *adapter) 576{ 577 struct igc_hw *hw = &adapter->hw; 578 int i; 579 580 /* Clear the flags first to avoid new packets to be enqueued 581 * for TX timestamping. 582 */ 583 for (i = 0; i < adapter->num_tx_queues; i++) { 584 struct igc_ring *tx_ring = adapter->tx_ring[i]; 585 586 clear_bit(IGC_RING_FLAG_TX_HWTSTAMP, &tx_ring->flags); 587 } 588 589 /* Now we can clean the pending TX timestamp requests. */ 590 igc_ptp_clear_tx_tstamp(adapter); 591 592 wr32(IGC_TSYNCTXCTL, 0); 593} 594 595static void igc_ptp_enable_tx_timestamp(struct igc_adapter *adapter) 596{ 597 struct igc_hw *hw = &adapter->hw; 598 int i; 599 600 wr32(IGC_TSYNCTXCTL, IGC_TSYNCTXCTL_ENABLED | IGC_TSYNCTXCTL_TXSYNSIG); 601 602 /* Read TXSTMP registers to discard any timestamp previously stored. */ 603 rd32(IGC_TXSTMPL); 604 rd32(IGC_TXSTMPH); 605 606 /* The hardware is ready to accept TX timestamp requests, 607 * notify the transmit path. 608 */ 609 for (i = 0; i < adapter->num_tx_queues; i++) { 610 struct igc_ring *tx_ring = adapter->tx_ring[i]; 611 612 set_bit(IGC_RING_FLAG_TX_HWTSTAMP, &tx_ring->flags); 613 } 614 615} 616 617/** 618 * igc_ptp_set_timestamp_mode - setup hardware for timestamping 619 * @adapter: networking device structure 620 * @config: hwtstamp configuration 621 * 622 * Return: 0 in case of success, negative errno code otherwise. 623 */ 624static int igc_ptp_set_timestamp_mode(struct igc_adapter *adapter, 625 struct hwtstamp_config *config) 626{ 627 switch (config->tx_type) { 628 case HWTSTAMP_TX_OFF: 629 igc_ptp_disable_tx_timestamp(adapter); 630 break; 631 case HWTSTAMP_TX_ON: 632 igc_ptp_enable_tx_timestamp(adapter); 633 break; 634 default: 635 return -ERANGE; 636 } 637 638 switch (config->rx_filter) { 639 case HWTSTAMP_FILTER_NONE: 640 igc_ptp_disable_rx_timestamp(adapter); 641 break; 642 case HWTSTAMP_FILTER_PTP_V1_L4_SYNC: 643 case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ: 644 case HWTSTAMP_FILTER_PTP_V2_EVENT: 645 case HWTSTAMP_FILTER_PTP_V2_L2_EVENT: 646 case HWTSTAMP_FILTER_PTP_V2_L4_EVENT: 647 case HWTSTAMP_FILTER_PTP_V2_SYNC: 648 case HWTSTAMP_FILTER_PTP_V2_L2_SYNC: 649 case HWTSTAMP_FILTER_PTP_V2_L4_SYNC: 650 case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ: 651 case HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ: 652 case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ: 653 case HWTSTAMP_FILTER_PTP_V1_L4_EVENT: 654 case HWTSTAMP_FILTER_NTP_ALL: 655 case HWTSTAMP_FILTER_ALL: 656 igc_ptp_enable_rx_timestamp(adapter); 657 config->rx_filter = HWTSTAMP_FILTER_ALL; 658 break; 659 default: 660 return -ERANGE; 661 } 662 663 return 0; 664} 665 666/* Requires adapter->ptp_tx_lock held by caller. */ 667static void igc_ptp_tx_timeout(struct igc_adapter *adapter, 668 struct igc_tx_timestamp_request *tstamp) 669{ 670 dev_kfree_skb_any(tstamp->skb); 671 tstamp->skb = NULL; 672 adapter->tx_hwtstamp_timeouts++; 673 674 netdev_warn(adapter->netdev, "Tx timestamp timeout\n"); 675} 676 677void igc_ptp_tx_hang(struct igc_adapter *adapter) 678{ 679 struct igc_tx_timestamp_request *tstamp; 680 struct igc_hw *hw = &adapter->hw; 681 unsigned long flags; 682 bool found = false; 683 int i; 684 685 spin_lock_irqsave(&adapter->ptp_tx_lock, flags); 686 687 for (i = 0; i < IGC_MAX_TX_TSTAMP_REGS; i++) { 688 tstamp = &adapter->tx_tstamp[i]; 689 690 if (!tstamp->skb) 691 continue; 692 693 if (time_is_after_jiffies(tstamp->start + IGC_PTP_TX_TIMEOUT)) 694 continue; 695 696 igc_ptp_tx_timeout(adapter, tstamp); 697 found = true; 698 } 699 700 if (found) { 701 /* Reading the high register of the first set of timestamp registers 702 * clears all the equivalent bits in the TSYNCTXCTL register. 703 */ 704 rd32(IGC_TXSTMPH_0); 705 } 706 707 spin_unlock_irqrestore(&adapter->ptp_tx_lock, flags); 708} 709 710static void igc_ptp_tx_reg_to_stamp(struct igc_adapter *adapter, 711 struct igc_tx_timestamp_request *tstamp, u64 regval) 712{ 713 struct skb_shared_hwtstamps shhwtstamps; 714 struct sk_buff *skb; 715 int adjust = 0; 716 717 skb = tstamp->skb; 718 if (!skb) 719 return; 720 721 if (igc_ptp_systim_to_hwtstamp(adapter, &shhwtstamps, regval)) 722 return; 723 724 switch (adapter->link_speed) { 725 case SPEED_10: 726 adjust = IGC_I225_TX_LATENCY_10; 727 break; 728 case SPEED_100: 729 adjust = IGC_I225_TX_LATENCY_100; 730 break; 731 case SPEED_1000: 732 adjust = IGC_I225_TX_LATENCY_1000; 733 break; 734 case SPEED_2500: 735 adjust = IGC_I225_TX_LATENCY_2500; 736 break; 737 } 738 739 shhwtstamps.hwtstamp = 740 ktime_add_ns(shhwtstamps.hwtstamp, adjust); 741 742 tstamp->skb = NULL; 743 744 skb_tstamp_tx(skb, &shhwtstamps); 745 dev_kfree_skb_any(skb); 746} 747 748/** 749 * igc_ptp_tx_hwtstamp - utility function which checks for TX time stamp 750 * @adapter: Board private structure 751 * 752 * Check against the ready mask for which of the timestamp register 753 * sets are ready to be retrieved, then retrieve that and notify the 754 * rest of the stack. 755 * 756 * Context: Expects adapter->ptp_tx_lock to be held by caller. 757 */ 758static void igc_ptp_tx_hwtstamp(struct igc_adapter *adapter) 759{ 760 struct igc_hw *hw = &adapter->hw; 761 u64 regval; 762 u32 mask; 763 int i; 764 765 mask = rd32(IGC_TSYNCTXCTL) & IGC_TSYNCTXCTL_TXTT_ANY; 766 if (mask & IGC_TSYNCTXCTL_TXTT_0) { 767 regval = rd32(IGC_TXSTMPL); 768 regval |= (u64)rd32(IGC_TXSTMPH) << 32; 769 } else { 770 /* There's a bug in the hardware that could cause 771 * missing interrupts for TX timestamping. The issue 772 * is that for new interrupts to be triggered, the 773 * IGC_TXSTMPH_0 register must be read. 774 * 775 * To avoid discarding a valid timestamp that just 776 * happened at the "wrong" time, we need to confirm 777 * that there was no timestamp captured, we do that by 778 * assuming that no two timestamps in sequence have 779 * the same nanosecond value. 780 * 781 * So, we read the "low" register, read the "high" 782 * register (to latch a new timestamp) and read the 783 * "low" register again, if "old" and "new" versions 784 * of the "low" register are different, a valid 785 * timestamp was captured, we can read the "high" 786 * register again. 787 */ 788 u32 txstmpl_old, txstmpl_new; 789 790 txstmpl_old = rd32(IGC_TXSTMPL); 791 rd32(IGC_TXSTMPH); 792 txstmpl_new = rd32(IGC_TXSTMPL); 793 794 if (txstmpl_old == txstmpl_new) 795 goto done; 796 797 regval = txstmpl_new; 798 regval |= (u64)rd32(IGC_TXSTMPH) << 32; 799 } 800 801 igc_ptp_tx_reg_to_stamp(adapter, &adapter->tx_tstamp[0], regval); 802 803done: 804 /* Now that the problematic first register was handled, we can 805 * use retrieve the timestamps from the other registers 806 * (starting from '1') with less complications. 807 */ 808 for (i = 1; i < IGC_MAX_TX_TSTAMP_REGS; i++) { 809 struct igc_tx_timestamp_request *tstamp = &adapter->tx_tstamp[i]; 810 811 if (!(tstamp->mask & mask)) 812 continue; 813 814 regval = rd32(tstamp->regl); 815 regval |= (u64)rd32(tstamp->regh) << 32; 816 817 igc_ptp_tx_reg_to_stamp(adapter, tstamp, regval); 818 } 819} 820 821/** 822 * igc_ptp_tx_tstamp_event 823 * @adapter: board private structure 824 * 825 * Called when a TX timestamp interrupt happens to retrieve the 826 * timestamp and send it up to the socket. 827 */ 828void igc_ptp_tx_tstamp_event(struct igc_adapter *adapter) 829{ 830 unsigned long flags; 831 832 spin_lock_irqsave(&adapter->ptp_tx_lock, flags); 833 834 igc_ptp_tx_hwtstamp(adapter); 835 836 spin_unlock_irqrestore(&adapter->ptp_tx_lock, flags); 837} 838 839/** 840 * igc_ptp_set_ts_config - set hardware time stamping config 841 * @netdev: network interface device structure 842 * @ifr: interface request data 843 * 844 **/ 845int igc_ptp_set_ts_config(struct net_device *netdev, struct ifreq *ifr) 846{ 847 struct igc_adapter *adapter = netdev_priv(netdev); 848 struct hwtstamp_config config; 849 int err; 850 851 if (copy_from_user(&config, ifr->ifr_data, sizeof(config))) 852 return -EFAULT; 853 854 err = igc_ptp_set_timestamp_mode(adapter, &config); 855 if (err) 856 return err; 857 858 /* save these settings for future reference */ 859 memcpy(&adapter->tstamp_config, &config, 860 sizeof(adapter->tstamp_config)); 861 862 return copy_to_user(ifr->ifr_data, &config, sizeof(config)) ? 863 -EFAULT : 0; 864} 865 866/** 867 * igc_ptp_get_ts_config - get hardware time stamping config 868 * @netdev: network interface device structure 869 * @ifr: interface request data 870 * 871 * Get the hwtstamp_config settings to return to the user. Rather than attempt 872 * to deconstruct the settings from the registers, just return a shadow copy 873 * of the last known settings. 874 **/ 875int igc_ptp_get_ts_config(struct net_device *netdev, struct ifreq *ifr) 876{ 877 struct igc_adapter *adapter = netdev_priv(netdev); 878 struct hwtstamp_config *config = &adapter->tstamp_config; 879 880 return copy_to_user(ifr->ifr_data, config, sizeof(*config)) ? 881 -EFAULT : 0; 882} 883 884/* The two conditions below must be met for cross timestamping via 885 * PCIe PTM: 886 * 887 * 1. We have an way to convert the timestamps in the PTM messages 888 * to something related to the system clocks (right now, only 889 * X86 systems with support for the Always Running Timer allow that); 890 * 891 * 2. We have PTM enabled in the path from the device to the PCIe root port. 892 */ 893static bool igc_is_crosststamp_supported(struct igc_adapter *adapter) 894{ 895 if (!IS_ENABLED(CONFIG_X86_TSC)) 896 return false; 897 898 /* FIXME: it was noticed that enabling support for PCIe PTM in 899 * some i225-V models could cause lockups when bringing the 900 * interface up/down. There should be no downsides to 901 * disabling crosstimestamping support for i225-V, as it 902 * doesn't have any PTP support. That way we gain some time 903 * while root causing the issue. 904 */ 905 if (adapter->pdev->device == IGC_DEV_ID_I225_V) 906 return false; 907 908 return pcie_ptm_enabled(adapter->pdev); 909} 910 911static struct system_counterval_t igc_device_tstamp_to_system(u64 tstamp) 912{ 913#if IS_ENABLED(CONFIG_X86_TSC) && !defined(CONFIG_UML) 914 return convert_art_ns_to_tsc(tstamp); 915#else 916 return (struct system_counterval_t) { }; 917#endif 918} 919 920static void igc_ptm_log_error(struct igc_adapter *adapter, u32 ptm_stat) 921{ 922 struct net_device *netdev = adapter->netdev; 923 924 switch (ptm_stat) { 925 case IGC_PTM_STAT_RET_ERR: 926 netdev_err(netdev, "PTM Error: Root port timeout\n"); 927 break; 928 case IGC_PTM_STAT_BAD_PTM_RES: 929 netdev_err(netdev, "PTM Error: Bad response, PTM Response Data expected\n"); 930 break; 931 case IGC_PTM_STAT_T4M1_OVFL: 932 netdev_err(netdev, "PTM Error: T4 minus T1 overflow\n"); 933 break; 934 case IGC_PTM_STAT_ADJUST_1ST: 935 netdev_err(netdev, "PTM Error: 1588 timer adjusted during first PTM cycle\n"); 936 break; 937 case IGC_PTM_STAT_ADJUST_CYC: 938 netdev_err(netdev, "PTM Error: 1588 timer adjusted during non-first PTM cycle\n"); 939 break; 940 default: 941 netdev_err(netdev, "PTM Error: Unknown error (%#x)\n", ptm_stat); 942 break; 943 } 944} 945 946static int igc_phc_get_syncdevicetime(ktime_t *device, 947 struct system_counterval_t *system, 948 void *ctx) 949{ 950 u32 stat, t2_curr_h, t2_curr_l, ctrl; 951 struct igc_adapter *adapter = ctx; 952 struct igc_hw *hw = &adapter->hw; 953 int err, count = 100; 954 ktime_t t1, t2_curr; 955 956 /* Get a snapshot of system clocks to use as historic value. */ 957 ktime_get_snapshot(&adapter->snapshot); 958 959 do { 960 /* Doing this in a loop because in the event of a 961 * badly timed (ha!) system clock adjustment, we may 962 * get PTM errors from the PCI root, but these errors 963 * are transitory. Repeating the process returns valid 964 * data eventually. 965 */ 966 967 /* To "manually" start the PTM cycle we need to clear and 968 * then set again the TRIG bit. 969 */ 970 ctrl = rd32(IGC_PTM_CTRL); 971 ctrl &= ~IGC_PTM_CTRL_TRIG; 972 wr32(IGC_PTM_CTRL, ctrl); 973 ctrl |= IGC_PTM_CTRL_TRIG; 974 wr32(IGC_PTM_CTRL, ctrl); 975 976 /* The cycle only starts "for real" when software notifies 977 * that it has read the registers, this is done by setting 978 * VALID bit. 979 */ 980 wr32(IGC_PTM_STAT, IGC_PTM_STAT_VALID); 981 982 err = readx_poll_timeout(rd32, IGC_PTM_STAT, stat, 983 stat, IGC_PTM_STAT_SLEEP, 984 IGC_PTM_STAT_TIMEOUT); 985 if (err < 0) { 986 netdev_err(adapter->netdev, "Timeout reading IGC_PTM_STAT register\n"); 987 return err; 988 } 989 990 if ((stat & IGC_PTM_STAT_VALID) == IGC_PTM_STAT_VALID) 991 break; 992 993 if (stat & ~IGC_PTM_STAT_VALID) { 994 /* An error occurred, log it. */ 995 igc_ptm_log_error(adapter, stat); 996 /* The STAT register is write-1-to-clear (W1C), 997 * so write the previous error status to clear it. 998 */ 999 wr32(IGC_PTM_STAT, stat); 1000 continue; 1001 } 1002 } while (--count); 1003 1004 if (!count) { 1005 netdev_err(adapter->netdev, "Exceeded number of tries for PTM cycle\n"); 1006 return -ETIMEDOUT; 1007 } 1008 1009 t1 = ktime_set(rd32(IGC_PTM_T1_TIM0_H), rd32(IGC_PTM_T1_TIM0_L)); 1010 1011 t2_curr_l = rd32(IGC_PTM_CURR_T2_L); 1012 t2_curr_h = rd32(IGC_PTM_CURR_T2_H); 1013 1014 /* FIXME: When the register that tells the endianness of the 1015 * PTM registers are implemented, check them here and add the 1016 * appropriate conversion. 1017 */ 1018 t2_curr_h = swab32(t2_curr_h); 1019 1020 t2_curr = ((s64)t2_curr_h << 32 | t2_curr_l); 1021 1022 *device = t1; 1023 *system = igc_device_tstamp_to_system(t2_curr); 1024 1025 return 0; 1026} 1027 1028static int igc_ptp_getcrosststamp(struct ptp_clock_info *ptp, 1029 struct system_device_crosststamp *cts) 1030{ 1031 struct igc_adapter *adapter = container_of(ptp, struct igc_adapter, 1032 ptp_caps); 1033 1034 return get_device_system_crosststamp(igc_phc_get_syncdevicetime, 1035 adapter, &adapter->snapshot, cts); 1036} 1037 1038/** 1039 * igc_ptp_init - Initialize PTP functionality 1040 * @adapter: Board private structure 1041 * 1042 * This function is called at device probe to initialize the PTP 1043 * functionality. 1044 */ 1045void igc_ptp_init(struct igc_adapter *adapter) 1046{ 1047 struct net_device *netdev = adapter->netdev; 1048 struct igc_tx_timestamp_request *tstamp; 1049 struct igc_hw *hw = &adapter->hw; 1050 int i; 1051 1052 tstamp = &adapter->tx_tstamp[0]; 1053 tstamp->mask = IGC_TSYNCTXCTL_TXTT_0; 1054 tstamp->regl = IGC_TXSTMPL_0; 1055 tstamp->regh = IGC_TXSTMPH_0; 1056 tstamp->flags = 0; 1057 1058 tstamp = &adapter->tx_tstamp[1]; 1059 tstamp->mask = IGC_TSYNCTXCTL_TXTT_1; 1060 tstamp->regl = IGC_TXSTMPL_1; 1061 tstamp->regh = IGC_TXSTMPH_1; 1062 tstamp->flags = IGC_TX_FLAGS_TSTAMP_1; 1063 1064 tstamp = &adapter->tx_tstamp[2]; 1065 tstamp->mask = IGC_TSYNCTXCTL_TXTT_2; 1066 tstamp->regl = IGC_TXSTMPL_2; 1067 tstamp->regh = IGC_TXSTMPH_2; 1068 tstamp->flags = IGC_TX_FLAGS_TSTAMP_2; 1069 1070 tstamp = &adapter->tx_tstamp[3]; 1071 tstamp->mask = IGC_TSYNCTXCTL_TXTT_3; 1072 tstamp->regl = IGC_TXSTMPL_3; 1073 tstamp->regh = IGC_TXSTMPH_3; 1074 tstamp->flags = IGC_TX_FLAGS_TSTAMP_3; 1075 1076 switch (hw->mac.type) { 1077 case igc_i225: 1078 for (i = 0; i < IGC_N_SDP; i++) { 1079 struct ptp_pin_desc *ppd = &adapter->sdp_config[i]; 1080 1081 snprintf(ppd->name, sizeof(ppd->name), "SDP%d", i); 1082 ppd->index = i; 1083 ppd->func = PTP_PF_NONE; 1084 } 1085 snprintf(adapter->ptp_caps.name, 16, "%pm", netdev->dev_addr); 1086 adapter->ptp_caps.owner = THIS_MODULE; 1087 adapter->ptp_caps.max_adj = 62499999; 1088 adapter->ptp_caps.adjfine = igc_ptp_adjfine_i225; 1089 adapter->ptp_caps.adjtime = igc_ptp_adjtime_i225; 1090 adapter->ptp_caps.gettimex64 = igc_ptp_gettimex64_i225; 1091 adapter->ptp_caps.settime64 = igc_ptp_settime_i225; 1092 adapter->ptp_caps.enable = igc_ptp_feature_enable_i225; 1093 adapter->ptp_caps.pps = 1; 1094 adapter->ptp_caps.pin_config = adapter->sdp_config; 1095 adapter->ptp_caps.n_ext_ts = IGC_N_EXTTS; 1096 adapter->ptp_caps.n_per_out = IGC_N_PEROUT; 1097 adapter->ptp_caps.n_pins = IGC_N_SDP; 1098 adapter->ptp_caps.verify = igc_ptp_verify_pin; 1099 1100 if (!igc_is_crosststamp_supported(adapter)) 1101 break; 1102 1103 adapter->ptp_caps.getcrosststamp = igc_ptp_getcrosststamp; 1104 break; 1105 default: 1106 adapter->ptp_clock = NULL; 1107 return; 1108 } 1109 1110 spin_lock_init(&adapter->ptp_tx_lock); 1111 spin_lock_init(&adapter->tmreg_lock); 1112 1113 adapter->tstamp_config.rx_filter = HWTSTAMP_FILTER_NONE; 1114 adapter->tstamp_config.tx_type = HWTSTAMP_TX_OFF; 1115 1116 adapter->prev_ptp_time = ktime_to_timespec64(ktime_get_real()); 1117 adapter->ptp_reset_start = ktime_get(); 1118 1119 adapter->ptp_clock = ptp_clock_register(&adapter->ptp_caps, 1120 &adapter->pdev->dev); 1121 if (IS_ERR(adapter->ptp_clock)) { 1122 adapter->ptp_clock = NULL; 1123 netdev_err(netdev, "ptp_clock_register failed\n"); 1124 } else if (adapter->ptp_clock) { 1125 netdev_info(netdev, "PHC added\n"); 1126 adapter->ptp_flags |= IGC_PTP_ENABLED; 1127 } 1128} 1129 1130static void igc_ptp_time_save(struct igc_adapter *adapter) 1131{ 1132 igc_ptp_read(adapter, &adapter->prev_ptp_time); 1133 adapter->ptp_reset_start = ktime_get(); 1134} 1135 1136static void igc_ptp_time_restore(struct igc_adapter *adapter) 1137{ 1138 struct timespec64 ts = adapter->prev_ptp_time; 1139 ktime_t delta; 1140 1141 delta = ktime_sub(ktime_get(), adapter->ptp_reset_start); 1142 1143 timespec64_add_ns(&ts, ktime_to_ns(delta)); 1144 1145 igc_ptp_write_i225(adapter, &ts); 1146} 1147 1148static void igc_ptm_stop(struct igc_adapter *adapter) 1149{ 1150 struct igc_hw *hw = &adapter->hw; 1151 u32 ctrl; 1152 1153 ctrl = rd32(IGC_PTM_CTRL); 1154 ctrl &= ~IGC_PTM_CTRL_EN; 1155 1156 wr32(IGC_PTM_CTRL, ctrl); 1157} 1158 1159/** 1160 * igc_ptp_suspend - Disable PTP work items and prepare for suspend 1161 * @adapter: Board private structure 1162 * 1163 * This function stops the overflow check work and PTP Tx timestamp work, and 1164 * will prepare the device for OS suspend. 1165 */ 1166void igc_ptp_suspend(struct igc_adapter *adapter) 1167{ 1168 if (!(adapter->ptp_flags & IGC_PTP_ENABLED)) 1169 return; 1170 1171 igc_ptp_clear_tx_tstamp(adapter); 1172 1173 if (pci_device_is_present(adapter->pdev)) { 1174 igc_ptp_time_save(adapter); 1175 igc_ptm_stop(adapter); 1176 } 1177} 1178 1179/** 1180 * igc_ptp_stop - Disable PTP device and stop the overflow check. 1181 * @adapter: Board private structure. 1182 * 1183 * This function stops the PTP support and cancels the delayed work. 1184 **/ 1185void igc_ptp_stop(struct igc_adapter *adapter) 1186{ 1187 igc_ptp_suspend(adapter); 1188 1189 if (adapter->ptp_clock) { 1190 ptp_clock_unregister(adapter->ptp_clock); 1191 netdev_info(adapter->netdev, "PHC removed\n"); 1192 adapter->ptp_flags &= ~IGC_PTP_ENABLED; 1193 } 1194} 1195 1196/** 1197 * igc_ptp_reset - Re-enable the adapter for PTP following a reset. 1198 * @adapter: Board private structure. 1199 * 1200 * This function handles the reset work required to re-enable the PTP device. 1201 **/ 1202void igc_ptp_reset(struct igc_adapter *adapter) 1203{ 1204 struct igc_hw *hw = &adapter->hw; 1205 u32 cycle_ctrl, ctrl; 1206 unsigned long flags; 1207 u32 timadj; 1208 1209 /* reset the tstamp_config */ 1210 igc_ptp_set_timestamp_mode(adapter, &adapter->tstamp_config); 1211 1212 spin_lock_irqsave(&adapter->tmreg_lock, flags); 1213 1214 switch (adapter->hw.mac.type) { 1215 case igc_i225: 1216 timadj = rd32(IGC_TIMADJ); 1217 timadj |= IGC_TIMADJ_ADJUST_METH; 1218 wr32(IGC_TIMADJ, timadj); 1219 1220 wr32(IGC_TSAUXC, 0x0); 1221 wr32(IGC_TSSDP, 0x0); 1222 wr32(IGC_TSIM, 1223 IGC_TSICR_INTERRUPTS | 1224 (adapter->pps_sys_wrap_on ? IGC_TSICR_SYS_WRAP : 0)); 1225 wr32(IGC_IMS, IGC_IMS_TS); 1226 1227 if (!igc_is_crosststamp_supported(adapter)) 1228 break; 1229 1230 wr32(IGC_PCIE_DIG_DELAY, IGC_PCIE_DIG_DELAY_DEFAULT); 1231 wr32(IGC_PCIE_PHY_DELAY, IGC_PCIE_PHY_DELAY_DEFAULT); 1232 1233 cycle_ctrl = IGC_PTM_CYCLE_CTRL_CYC_TIME(IGC_PTM_CYC_TIME_DEFAULT); 1234 1235 wr32(IGC_PTM_CYCLE_CTRL, cycle_ctrl); 1236 1237 ctrl = IGC_PTM_CTRL_EN | 1238 IGC_PTM_CTRL_START_NOW | 1239 IGC_PTM_CTRL_SHRT_CYC(IGC_PTM_SHORT_CYC_DEFAULT) | 1240 IGC_PTM_CTRL_PTM_TO(IGC_PTM_TIMEOUT_DEFAULT) | 1241 IGC_PTM_CTRL_TRIG; 1242 1243 wr32(IGC_PTM_CTRL, ctrl); 1244 1245 /* Force the first cycle to run. */ 1246 wr32(IGC_PTM_STAT, IGC_PTM_STAT_VALID); 1247 1248 break; 1249 default: 1250 /* No work to do. */ 1251 goto out; 1252 } 1253 1254 /* Re-initialize the timer. */ 1255 if (hw->mac.type == igc_i225) { 1256 igc_ptp_time_restore(adapter); 1257 } else { 1258 timecounter_init(&adapter->tc, &adapter->cc, 1259 ktime_to_ns(ktime_get_real())); 1260 } 1261out: 1262 spin_unlock_irqrestore(&adapter->tmreg_lock, flags); 1263 1264 wrfl(); 1265} 1266