drivers/net/ethernet/intel/igb/igb_ptp.c

   1 /* PTP Hardware Clock (PHC) driver for the Intel 82576 and 82580
   2  *
   3  * Copyright (C) 2011 Richard Cochran <richardcochran@gmail.com>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along with
  16  * this program; if not, see <http://www.gnu.org/licenses/>.
  17  */
  18 #include <linux/module.h>
  19 #include <linux/device.h>
  20 #include <linux/pci.h>
  21 #include <linux/ptp_classify.h>
  22
  23 #include "igb.h"
  24
  25 #define INCVALUE_MASK           0x7fffffff
  26 #define ISGN                    0x80000000
  27
  28 /* The 82580 timesync updates the system timer every 8ns by 8ns,
  29  * and this update value cannot be reprogrammed.
  30  *
  31  * Neither the 82576 nor the 82580 offer registers wide enough to hold
  32  * nanoseconds time values for very long. For the 82580, SYSTIM always
  33  * counts nanoseconds, but the upper 24 bits are not available. The
  34  * frequency is adjusted by changing the 32 bit fractional nanoseconds
  35  * register, TIMINCA.
  36  *
  37  * For the 82576, the SYSTIM register time unit is affect by the
  38  * choice of the 24 bit TININCA:IV (incvalue) field. Five bits of this
  39  * field are needed to provide the nominal 16 nanosecond period,
  40  * leaving 19 bits for fractional nanoseconds.
  41  *
  42  * We scale the NIC clock cycle by a large factor so that relatively
  43  * small clock corrections can be added or subtracted at each clock
  44  * tick. The drawbacks of a large factor are a) that the clock
  45  * register overflows more quickly (not such a big deal) and b) that
  46  * the increment per tick has to fit into 24 bits.  As a result we
  47  * need to use a shift of 19 so we can fit a value of 16 into the
  48  * TIMINCA register.
  49  *
  50  *
  51  *             SYSTIMH            SYSTIML
  52  *        +--------------+   +---+---+------+
  53  *  82576 |      32      |   | 8 | 5 |  19  |
  54  *        +--------------+   +---+---+------+
  55  *         \________ 45 bits _______/  fract
  56  *
  57  *        +----------+---+   +--------------+
  58  *  82580 |    24    | 8 |   |      32      |
  59  *        +----------+---+   +--------------+
  60  *          reserved  \______ 40 bits _____/
  61  *
  62  *
  63  * The 45 bit 82576 SYSTIM overflows every
  64  *   2^45 * 10^-9 / 3600 = 9.77 hours.
  65  *
  66  * The 40 bit 82580 SYSTIM overflows every
  67  *   2^40 * 10^-9 /  60  = 18.3 minutes.
  68  */
  69
  70 #define IGB_SYSTIM_OVERFLOW_PERIOD      (HZ * 60 * 9)
  71 #define IGB_PTP_TX_TIMEOUT              (HZ * 15)
  72 #define INCPERIOD_82576                 BIT(E1000_TIMINCA_16NS_SHIFT)
  73 #define INCVALUE_82576_MASK             GENMASK(E1000_TIMINCA_16NS_SHIFT - 1, 0)
  74 #define INCVALUE_82576                  (16u << IGB_82576_TSYNC_SHIFT)
  75 #define IGB_NBITS_82580                 40
  76
  77 static void igb_ptp_tx_hwtstamp(struct igb_adapter *adapter);
  78
  79 /* SYSTIM read access for the 82576 */
  80 static u64 igb_ptp_read_82576(const struct cyclecounter *cc)
  81 {
  82         struct igb_adapter *igb = container_of(cc, struct igb_adapter, cc);
  83         struct e1000_hw *hw = &igb->hw;
  84         u64 val;
  85         u32 lo, hi;
  86
  87         lo = rd32(E1000_SYSTIML);
  88         hi = rd32(E1000_SYSTIMH);
  89
  90         val = ((u64) hi) << 32;
  91         val |= lo;
  92
  93         return val;
  94 }
  95
  96 /* SYSTIM read access for the 82580 */
  97 static u64 igb_ptp_read_82580(const struct cyclecounter *cc)
  98 {
  99         struct igb_adapter *igb = container_of(cc, struct igb_adapter, cc);
 100         struct e1000_hw *hw = &igb->hw;
 101         u32 lo, hi;
 102         u64 val;
 103
 104         /* The timestamp latches on lowest register read. For the 82580
 105          * the lowest register is SYSTIMR instead of SYSTIML.  However we only
 106          * need to provide nanosecond resolution, so we just ignore it.
 107          */
 108         rd32(E1000_SYSTIMR);
 109         lo = rd32(E1000_SYSTIML);
 110         hi = rd32(E1000_SYSTIMH);
 111
 112         val = ((u64) hi) << 32;
 113         val |= lo;
 114
 115         return val;
 116 }
 117
 118 /* SYSTIM read access for I210/I211 */
 119 static void igb_ptp_read_i210(struct igb_adapter *adapter,
 120                               struct timespec64 *ts)
 121 {
 122         struct e1000_hw *hw = &adapter->hw;
 123         u32 sec, nsec;
 124
 125         /* The timestamp latches on lowest register read. For I210/I211, the
 126          * lowest register is SYSTIMR. Since we only need to provide nanosecond
 127          * resolution, we can ignore it.
 128          */
 129         rd32(E1000_SYSTIMR);
 130         nsec = rd32(E1000_SYSTIML);
 131         sec = rd32(E1000_SYSTIMH);
 132
 133         ts->tv_sec = sec;
 134         ts->tv_nsec = nsec;
 135 }
 136
 137 static void igb_ptp_write_i210(struct igb_adapter *adapter,
 138                                const struct timespec64 *ts)
 139 {
 140         struct e1000_hw *hw = &adapter->hw;
 141
 142         /* Writing the SYSTIMR register is not necessary as it only provides
 143          * sub-nanosecond resolution.
 144          */
 145         wr32(E1000_SYSTIML, ts->tv_nsec);
 146         wr32(E1000_SYSTIMH, (u32)ts->tv_sec);
 147 }
 148
 149 /**
 150  * igb_ptp_systim_to_hwtstamp - convert system time value to hw timestamp
 151  * @adapter: board private structure
 152  * @hwtstamps: timestamp structure to update
 153  * @systim: unsigned 64bit system time value.
 154  *
 155  * We need to convert the system time value stored in the RX/TXSTMP registers
 156  * into a hwtstamp which can be used by the upper level timestamping functions.
 157  *
 158  * The 'tmreg_lock' spinlock is used to protect the consistency of the
 159  * system time value. This is needed because reading the 64 bit time
 160  * value involves reading two (or three) 32 bit registers. The first
 161  * read latches the value. Ditto for writing.
 162  *
 163  * In addition, here have extended the system time with an overflow
 164  * counter in software.
 165  **/
 166 static void igb_ptp_systim_to_hwtstamp(struct igb_adapter *adapter,
 167                                        struct skb_shared_hwtstamps *hwtstamps,
 168                                        u64 systim)
 169 {
 170         unsigned long flags;
 171         u64 ns;
 172
 173         switch (adapter->hw.mac.type) {
 174         case e1000_82576:
 175         case e1000_82580:
 176         case e1000_i354:
 177         case e1000_i350:
 178                 spin_lock_irqsave(&adapter->tmreg_lock, flags);
 179
 180                 ns = timecounter_cyc2time(&adapter->tc, systim);
 181
 182                 spin_unlock_irqrestore(&adapter->tmreg_lock, flags);
 183
 184                 memset(hwtstamps, 0, sizeof(*hwtstamps));
 185                 hwtstamps->hwtstamp = ns_to_ktime(ns);
 186                 break;
 187         case e1000_i210:
 188         case e1000_i211:
 189                 memset(hwtstamps, 0, sizeof(*hwtstamps));
 190                 /* Upper 32 bits contain s, lower 32 bits contain ns. */
 191                 hwtstamps->hwtstamp = ktime_set(systim >> 32,
 192                                                 systim & 0xFFFFFFFF);
 193                 break;
 194         default:
 195                 break;
 196         }
 197 }
 198
 199 /* PTP clock operations */
 200 static int igb_ptp_adjfreq_82576(struct ptp_clock_info *ptp, s32 ppb)
 201 {
 202         struct igb_adapter *igb = container_of(ptp, struct igb_adapter,
 203                                                ptp_caps);
 204         struct e1000_hw *hw = &igb->hw;
 205         int neg_adj = 0;
 206         u64 rate;
 207         u32 incvalue;
 208
 209         if (ppb < 0) {
 210                 neg_adj = 1;
 211                 ppb = -ppb;
 212         }
 213         rate = ppb;
 214         rate <<= 14;
 215         rate = div_u64(rate, 1953125);
 216
 217         incvalue = 16 << IGB_82576_TSYNC_SHIFT;
 218
 219         if (neg_adj)
 220                 incvalue -= rate;
 221         else
 222                 incvalue += rate;
 223
 224         wr32(E1000_TIMINCA, INCPERIOD_82576 | (incvalue & INCVALUE_82576_MASK));
 225
 226         return 0;
 227 }
 228
 229 static int igb_ptp_adjfine_82580(struct ptp_clock_info *ptp, long scaled_ppm)
 230 {
 231         struct igb_adapter *igb = container_of(ptp, struct igb_adapter,
 232                                                ptp_caps);
 233         struct e1000_hw *hw = &igb->hw;
 234         int neg_adj = 0;
 235         u64 rate;
 236         u32 inca;
 237
 238         if (scaled_ppm < 0) {
 239                 neg_adj = 1;
 240                 scaled_ppm = -scaled_ppm;
 241         }
 242         rate = scaled_ppm;
 243         rate <<= 13;
 244         rate = div_u64(rate, 15625);
 245
 246         inca = rate & INCVALUE_MASK;
 247         if (neg_adj)
 248                 inca |= ISGN;
 249
 250         wr32(E1000_TIMINCA, inca);
 251
 252         return 0;
 253 }
 254
 255 static int igb_ptp_adjtime_82576(struct ptp_clock_info *ptp, s64 delta)
 256 {
 257         struct igb_adapter *igb = container_of(ptp, struct igb_adapter,
 258                                                ptp_caps);
 259         unsigned long flags;
 260
 261         spin_lock_irqsave(&igb->tmreg_lock, flags);
 262         timecounter_adjtime(&igb->tc, delta);
 263         spin_unlock_irqrestore(&igb->tmreg_lock, flags);
 264
 265         return 0;
 266 }
 267
 268 static int igb_ptp_adjtime_i210(struct ptp_clock_info *ptp, s64 delta)
 269 {
 270         struct igb_adapter *igb = container_of(ptp, struct igb_adapter,
 271                                                ptp_caps);
 272         unsigned long flags;
 273         struct timespec64 now, then = ns_to_timespec64(delta);
 274
 275         spin_lock_irqsave(&igb->tmreg_lock, flags);
 276
 277         igb_ptp_read_i210(igb, &now);
 278         now = timespec64_add(now, then);
 279         igb_ptp_write_i210(igb, (const struct timespec64 *)&now);
 280
 281         spin_unlock_irqrestore(&igb->tmreg_lock, flags);
 282
 283         return 0;
 284 }
 285
 286 static int igb_ptp_gettime_82576(struct ptp_clock_info *ptp,
 287                                  struct timespec64 *ts)
 288 {
 289         struct igb_adapter *igb = container_of(ptp, struct igb_adapter,
 290                                                ptp_caps);
 291         unsigned long flags;
 292         u64 ns;
 293
 294         spin_lock_irqsave(&igb->tmreg_lock, flags);
 295
 296         ns = timecounter_read(&igb->tc);
 297
 298         spin_unlock_irqrestore(&igb->tmreg_lock, flags);
 299
 300         *ts = ns_to_timespec64(ns);
 301
 302         return 0;
 303 }
 304
 305 static int igb_ptp_gettime_i210(struct ptp_clock_info *ptp,
 306                                 struct timespec64 *ts)
 307 {
 308         struct igb_adapter *igb = container_of(ptp, struct igb_adapter,
 309                                                ptp_caps);
 310         unsigned long flags;
 311
 312         spin_lock_irqsave(&igb->tmreg_lock, flags);
 313
 314         igb_ptp_read_i210(igb, ts);
 315
 316         spin_unlock_irqrestore(&igb->tmreg_lock, flags);
 317
 318         return 0;
 319 }
 320
 321 static int igb_ptp_settime_82576(struct ptp_clock_info *ptp,
 322                                  const struct timespec64 *ts)
 323 {
 324         struct igb_adapter *igb = container_of(ptp, struct igb_adapter,
 325                                                ptp_caps);
 326         unsigned long flags;
 327         u64 ns;
 328
 329         ns = timespec64_to_ns(ts);
 330
 331         spin_lock_irqsave(&igb->tmreg_lock, flags);
 332
 333         timecounter_init(&igb->tc, &igb->cc, ns);
 334
 335         spin_unlock_irqrestore(&igb->tmreg_lock, flags);
 336
 337         return 0;
 338 }
 339
 340 static int igb_ptp_settime_i210(struct ptp_clock_info *ptp,
 341                                 const struct timespec64 *ts)
 342 {
 343         struct igb_adapter *igb = container_of(ptp, struct igb_adapter,
 344                                                ptp_caps);
 345         unsigned long flags;
 346
 347         spin_lock_irqsave(&igb->tmreg_lock, flags);
 348
 349         igb_ptp_write_i210(igb, ts);
 350
 351         spin_unlock_irqrestore(&igb->tmreg_lock, flags);
 352
 353         return 0;
 354 }
 355
 356 static void igb_pin_direction(int pin, int input, u32 *ctrl, u32 *ctrl_ext)
 357 {
 358         u32 *ptr = pin < 2 ? ctrl : ctrl_ext;
 359         static const u32 mask[IGB_N_SDP] = {
 360                 E1000_CTRL_SDP0_DIR,
 361                 E1000_CTRL_SDP1_DIR,
 362                 E1000_CTRL_EXT_SDP2_DIR,
 363                 E1000_CTRL_EXT_SDP3_DIR,
 364         };
 365
 366         if (input)
 367                 *ptr &= ~mask[pin];
 368         else
 369                 *ptr |= mask[pin];
 370 }
 371
 372 static void igb_pin_extts(struct igb_adapter *igb, int chan, int pin)
 373 {
 374         static const u32 aux0_sel_sdp[IGB_N_SDP] = {
 375                 AUX0_SEL_SDP0, AUX0_SEL_SDP1, AUX0_SEL_SDP2, AUX0_SEL_SDP3,
 376         };
 377         static const u32 aux1_sel_sdp[IGB_N_SDP] = {
 378                 AUX1_SEL_SDP0, AUX1_SEL_SDP1, AUX1_SEL_SDP2, AUX1_SEL_SDP3,
 379         };
 380         static const u32 ts_sdp_en[IGB_N_SDP] = {
 381                 TS_SDP0_EN, TS_SDP1_EN, TS_SDP2_EN, TS_SDP3_EN,
 382         };
 383         struct e1000_hw *hw = &igb->hw;
 384         u32 ctrl, ctrl_ext, tssdp = 0;
 385
 386         ctrl = rd32(E1000_CTRL);
 387         ctrl_ext = rd32(E1000_CTRL_EXT);
 388         tssdp = rd32(E1000_TSSDP);
 389
 390         igb_pin_direction(pin, 1, &ctrl, &ctrl_ext);
 391
 392         /* Make sure this pin is not enabled as an output. */
 393         tssdp &= ~ts_sdp_en[pin];
 394
 395         if (chan == 1) {
 396                 tssdp &= ~AUX1_SEL_SDP3;
 397                 tssdp |= aux1_sel_sdp[pin] | AUX1_TS_SDP_EN;
 398         } else {
 399                 tssdp &= ~AUX0_SEL_SDP3;
 400                 tssdp |= aux0_sel_sdp[pin] | AUX0_TS_SDP_EN;
 401         }
 402
 403         wr32(E1000_TSSDP, tssdp);
 404         wr32(E1000_CTRL, ctrl);
 405         wr32(E1000_CTRL_EXT, ctrl_ext);
 406 }
 407
 408 static void igb_pin_perout(struct igb_adapter *igb, int chan, int pin, int freq)
 409 {
 410         static const u32 aux0_sel_sdp[IGB_N_SDP] = {
 411                 AUX0_SEL_SDP0, AUX0_SEL_SDP1, AUX0_SEL_SDP2, AUX0_SEL_SDP3,
 412         };
 413         static const u32 aux1_sel_sdp[IGB_N_SDP] = {
 414                 AUX1_SEL_SDP0, AUX1_SEL_SDP1, AUX1_SEL_SDP2, AUX1_SEL_SDP3,
 415         };
 416         static const u32 ts_sdp_en[IGB_N_SDP] = {
 417                 TS_SDP0_EN, TS_SDP1_EN, TS_SDP2_EN, TS_SDP3_EN,
 418         };
 419         static const u32 ts_sdp_sel_tt0[IGB_N_SDP] = {
 420                 TS_SDP0_SEL_TT0, TS_SDP1_SEL_TT0,
 421                 TS_SDP2_SEL_TT0, TS_SDP3_SEL_TT0,
 422         };
 423         static const u32 ts_sdp_sel_tt1[IGB_N_SDP] = {
 424                 TS_SDP0_SEL_TT1, TS_SDP1_SEL_TT1,
 425                 TS_SDP2_SEL_TT1, TS_SDP3_SEL_TT1,
 426         };
 427         static const u32 ts_sdp_sel_fc0[IGB_N_SDP] = {
 428                 TS_SDP0_SEL_FC0, TS_SDP1_SEL_FC0,
 429                 TS_SDP2_SEL_FC0, TS_SDP3_SEL_FC0,
 430         };
 431         static const u32 ts_sdp_sel_fc1[IGB_N_SDP] = {
 432                 TS_SDP0_SEL_FC1, TS_SDP1_SEL_FC1,
 433                 TS_SDP2_SEL_FC1, TS_SDP3_SEL_FC1,
 434         };
 435         static const u32 ts_sdp_sel_clr[IGB_N_SDP] = {
 436                 TS_SDP0_SEL_FC1, TS_SDP1_SEL_FC1,
 437                 TS_SDP2_SEL_FC1, TS_SDP3_SEL_FC1,
 438         };
 439         struct e1000_hw *hw = &igb->hw;
 440         u32 ctrl, ctrl_ext, tssdp = 0;
 441
 442         ctrl = rd32(E1000_CTRL);
 443         ctrl_ext = rd32(E1000_CTRL_EXT);
 444         tssdp = rd32(E1000_TSSDP);
 445
 446         igb_pin_direction(pin, 0, &ctrl, &ctrl_ext);
 447
 448         /* Make sure this pin is not enabled as an input. */
 449         if ((tssdp & AUX0_SEL_SDP3) == aux0_sel_sdp[pin])
 450                 tssdp &= ~AUX0_TS_SDP_EN;
 451
 452         if ((tssdp & AUX1_SEL_SDP3) == aux1_sel_sdp[pin])
 453                 tssdp &= ~AUX1_TS_SDP_EN;
 454
 455         tssdp &= ~ts_sdp_sel_clr[pin];
 456         if (freq) {
 457                 if (chan == 1)
 458                         tssdp |= ts_sdp_sel_fc1[pin];
 459                 else
 460                         tssdp |= ts_sdp_sel_fc0[pin];
 461         } else {
 462                 if (chan == 1)
 463                         tssdp |= ts_sdp_sel_tt1[pin];
 464                 else
 465                         tssdp |= ts_sdp_sel_tt0[pin];
 466         }
 467         tssdp |= ts_sdp_en[pin];
 468
 469         wr32(E1000_TSSDP, tssdp);
 470         wr32(E1000_CTRL, ctrl);
 471         wr32(E1000_CTRL_EXT, ctrl_ext);
 472 }
 473
 474 static int igb_ptp_feature_enable_i210(struct ptp_clock_info *ptp,
 475                                        struct ptp_clock_request *rq, int on)
 476 {
 477         struct igb_adapter *igb =
 478                 container_of(ptp, struct igb_adapter, ptp_caps);
 479         struct e1000_hw *hw = &igb->hw;
 480         u32 tsauxc, tsim, tsauxc_mask, tsim_mask, trgttiml, trgttimh, freqout;
 481         unsigned long flags;
 482         struct timespec64 ts;
 483         int use_freq = 0, pin = -1;
 484         s64 ns;
 485
 486         switch (rq->type) {
 487         case PTP_CLK_REQ_EXTTS:
 488                 if (on) {
 489                         pin = ptp_find_pin(igb->ptp_clock, PTP_PF_EXTTS,
 490                                            rq->extts.index);
 491                         if (pin < 0)
 492                                 return -EBUSY;
 493                 }
 494                 if (rq->extts.index == 1) {
 495                         tsauxc_mask = TSAUXC_EN_TS1;
 496                         tsim_mask = TSINTR_AUTT1;
 497                 } else {
 498                         tsauxc_mask = TSAUXC_EN_TS0;
 499                         tsim_mask = TSINTR_AUTT0;
 500                 }
 501                 spin_lock_irqsave(&igb->tmreg_lock, flags);
 502                 tsauxc = rd32(E1000_TSAUXC);
 503                 tsim = rd32(E1000_TSIM);
 504                 if (on) {
 505                         igb_pin_extts(igb, rq->extts.index, pin);
 506                         tsauxc |= tsauxc_mask;
 507                         tsim |= tsim_mask;
 508                 } else {
 509                         tsauxc &= ~tsauxc_mask;
 510                         tsim &= ~tsim_mask;
 511                 }
 512                 wr32(E1000_TSAUXC, tsauxc);
 513                 wr32(E1000_TSIM, tsim);
 514                 spin_unlock_irqrestore(&igb->tmreg_lock, flags);
 515                 return 0;
 516
 517         case PTP_CLK_REQ_PEROUT:
 518                 if (on) {
 519                         pin = ptp_find_pin(igb->ptp_clock, PTP_PF_PEROUT,
 520                                            rq->perout.index);
 521                         if (pin < 0)
 522                                 return -EBUSY;
 523                 }
 524                 ts.tv_sec = rq->perout.period.sec;
 525                 ts.tv_nsec = rq->perout.period.nsec;
 526                 ns = timespec64_to_ns(&ts);
 527                 ns = ns >> 1;
 528                 if (on && ((ns <= 70000000LL) || (ns == 125000000LL) ||
 529                            (ns == 250000000LL) || (ns == 500000000LL))) {
 530                         if (ns < 8LL)
 531                                 return -EINVAL;
 532                         use_freq = 1;
 533                 }
 534                 ts = ns_to_timespec64(ns);
 535                 if (rq->perout.index == 1) {
 536                         if (use_freq) {
 537                                 tsauxc_mask = TSAUXC_EN_CLK1 | TSAUXC_ST1;
 538                                 tsim_mask = 0;
 539                         } else {
 540                                 tsauxc_mask = TSAUXC_EN_TT1;
 541                                 tsim_mask = TSINTR_TT1;
 542                         }
 543                         trgttiml = E1000_TRGTTIML1;
 544                         trgttimh = E1000_TRGTTIMH1;
 545                         freqout = E1000_FREQOUT1;
 546                 } else {
 547                         if (use_freq) {
 548                                 tsauxc_mask = TSAUXC_EN_CLK0 | TSAUXC_ST0;
 549                                 tsim_mask = 0;
 550                         } else {
 551                                 tsauxc_mask = TSAUXC_EN_TT0;
 552                                 tsim_mask = TSINTR_TT0;
 553                         }
 554                         trgttiml = E1000_TRGTTIML0;
 555                         trgttimh = E1000_TRGTTIMH0;
 556                         freqout = E1000_FREQOUT0;
 557                 }
 558                 spin_lock_irqsave(&igb->tmreg_lock, flags);
 559                 tsauxc = rd32(E1000_TSAUXC);
 560                 tsim = rd32(E1000_TSIM);
 561                 if (rq->perout.index == 1) {
 562                         tsauxc &= ~(TSAUXC_EN_TT1 | TSAUXC_EN_CLK1 | TSAUXC_ST1);
 563                         tsim &= ~TSINTR_TT1;
 564                 } else {
 565                         tsauxc &= ~(TSAUXC_EN_TT0 | TSAUXC_EN_CLK0 | TSAUXC_ST0);
 566                         tsim &= ~TSINTR_TT0;
 567                 }
 568                 if (on) {
 569                         int i = rq->perout.index;
 570                         igb_pin_perout(igb, i, pin, use_freq);
 571                         igb->perout[i].start.tv_sec = rq->perout.start.sec;
 572                         igb->perout[i].start.tv_nsec = rq->perout.start.nsec;
 573                         igb->perout[i].period.tv_sec = ts.tv_sec;
 574                         igb->perout[i].period.tv_nsec = ts.tv_nsec;
 575                         wr32(trgttimh, rq->perout.start.sec);
 576                         wr32(trgttiml, rq->perout.start.nsec);
 577                         if (use_freq)
 578                                 wr32(freqout, ns);
 579                         tsauxc |= tsauxc_mask;
 580                         tsim |= tsim_mask;
 581                 }
 582                 wr32(E1000_TSAUXC, tsauxc);
 583                 wr32(E1000_TSIM, tsim);
 584                 spin_unlock_irqrestore(&igb->tmreg_lock, flags);
 585                 return 0;
 586
 587         case PTP_CLK_REQ_PPS:
 588                 spin_lock_irqsave(&igb->tmreg_lock, flags);
 589                 tsim = rd32(E1000_TSIM);
 590                 if (on)
 591                         tsim |= TSINTR_SYS_WRAP;
 592                 else
 593                         tsim &= ~TSINTR_SYS_WRAP;
 594                 igb->pps_sys_wrap_on = !!on;
 595                 wr32(E1000_TSIM, tsim);
 596                 spin_unlock_irqrestore(&igb->tmreg_lock, flags);
 597                 return 0;
 598         }
 599
 600         return -EOPNOTSUPP;
 601 }
 602
 603 static int igb_ptp_feature_enable(struct ptp_clock_info *ptp,
 604                                   struct ptp_clock_request *rq, int on)
 605 {
 606         return -EOPNOTSUPP;
 607 }
 608
 609 static int igb_ptp_verify_pin(struct ptp_clock_info *ptp, unsigned int pin,
 610                               enum ptp_pin_function func, unsigned int chan)
 611 {
 612         switch (func) {
 613         case PTP_PF_NONE:
 614         case PTP_PF_EXTTS:
 615         case PTP_PF_PEROUT:
 616                 break;
 617         case PTP_PF_PHYSYNC:
 618                 return -1;
 619         }
 620         return 0;
 621 }
 622
 623 /**
 624  * igb_ptp_tx_work
 625  * @work: pointer to work struct
 626  *
 627  * This work function polls the TSYNCTXCTL valid bit to determine when a
 628  * timestamp has been taken for the current stored skb.
 629  **/
 630 static void igb_ptp_tx_work(struct work_struct *work)
 631 {
 632         struct igb_adapter *adapter = container_of(work, struct igb_adapter,
 633                                                    ptp_tx_work);
 634         struct e1000_hw *hw = &adapter->hw;
 635         u32 tsynctxctl;
 636
 637         if (!adapter->ptp_tx_skb)
 638                 return;
 639
 640         if (time_is_before_jiffies(adapter->ptp_tx_start +
 641                                    IGB_PTP_TX_TIMEOUT)) {
 642                 dev_kfree_skb_any(adapter->ptp_tx_skb);
 643                 adapter->ptp_tx_skb = NULL;
 644                 clear_bit_unlock(__IGB_PTP_TX_IN_PROGRESS, &adapter->state);
 645                 adapter->tx_hwtstamp_timeouts++;
 646                 dev_warn(&adapter->pdev->dev, "clearing Tx timestamp hang\n");
 647                 return;
 648         }
 649
 650         tsynctxctl = rd32(E1000_TSYNCTXCTL);
 651         if (tsynctxctl & E1000_TSYNCTXCTL_VALID)
 652                 igb_ptp_tx_hwtstamp(adapter);
 653         else
 654                 /* reschedule to check later */
 655                 schedule_work(&adapter->ptp_tx_work);
 656 }
 657
 658 static void igb_ptp_overflow_check(struct work_struct *work)
 659 {
 660         struct igb_adapter *igb =
 661                 container_of(work, struct igb_adapter, ptp_overflow_work.work);
 662         struct timespec64 ts;
 663
 664         igb->ptp_caps.gettime64(&igb->ptp_caps, &ts);
 665
 666         pr_debug("igb overflow check at %lld.%09lu\n",
 667                  (long long) ts.tv_sec, ts.tv_nsec);
 668
 669         schedule_delayed_work(&igb->ptp_overflow_work,
 670                               IGB_SYSTIM_OVERFLOW_PERIOD);
 671 }
 672
 673 /**
 674  * igb_ptp_rx_hang - detect error case when Rx timestamp registers latched
 675  * @adapter: private network adapter structure
 676  *
 677  * This watchdog task is scheduled to detect error case where hardware has
 678  * dropped an Rx packet that was timestamped when the ring is full. The
 679  * particular error is rare but leaves the device in a state unable to timestamp
 680  * any future packets.
 681  **/
 682 void igb_ptp_rx_hang(struct igb_adapter *adapter)
 683 {
 684         struct e1000_hw *hw = &adapter->hw;
 685         u32 tsyncrxctl = rd32(E1000_TSYNCRXCTL);
 686         unsigned long rx_event;
 687
 688         /* Other hardware uses per-packet timestamps */
 689         if (hw->mac.type != e1000_82576)
 690                 return;
 691
 692         /* If we don't have a valid timestamp in the registers, just update the
 693          * timeout counter and exit
 694          */
 695         if (!(tsyncrxctl & E1000_TSYNCRXCTL_VALID)) {
 696                 adapter->last_rx_ptp_check = jiffies;
 697                 return;
 698         }
 699
 700         /* Determine the most recent watchdog or rx_timestamp event */
 701         rx_event = adapter->last_rx_ptp_check;
 702         if (time_after(adapter->last_rx_timestamp, rx_event))
 703                 rx_event = adapter->last_rx_timestamp;
 704
 705         /* Only need to read the high RXSTMP register to clear the lock */
 706         if (time_is_before_jiffies(rx_event + 5 * HZ)) {
 707                 rd32(E1000_RXSTMPH);
 708                 adapter->last_rx_ptp_check = jiffies;
 709                 adapter->rx_hwtstamp_cleared++;
 710                 dev_warn(&adapter->pdev->dev, "clearing Rx timestamp hang\n");
 711         }
 712 }
 713
 714 /**
 715  * igb_ptp_tx_hang - detect error case where Tx timestamp never finishes
 716  * @adapter: private network adapter structure
 717  */
 718 void igb_ptp_tx_hang(struct igb_adapter *adapter)
 719 {
 720         bool timeout = time_is_before_jiffies(adapter->ptp_tx_start +
 721                                               IGB_PTP_TX_TIMEOUT);
 722
 723         if (!adapter->ptp_tx_skb)
 724                 return;
 725
 726         if (!test_bit(__IGB_PTP_TX_IN_PROGRESS, &adapter->state))
 727                 return;
 728
 729         /* If we haven't received a timestamp within the timeout, it is
 730          * reasonable to assume that it will never occur, so we can unlock the
 731          * timestamp bit when this occurs.
 732          */
 733         if (timeout) {
 734                 cancel_work_sync(&adapter->ptp_tx_work);
 735                 dev_kfree_skb_any(adapter->ptp_tx_skb);
 736                 adapter->ptp_tx_skb = NULL;
 737                 clear_bit_unlock(__IGB_PTP_TX_IN_PROGRESS, &adapter->state);
 738                 adapter->tx_hwtstamp_timeouts++;
 739                 dev_warn(&adapter->pdev->dev, "clearing Tx timestamp hang\n");
 740         }
 741 }
 742
 743 /**
 744  * igb_ptp_tx_hwtstamp - utility function which checks for TX time stamp
 745  * @adapter: Board private structure.
 746  *
 747  * If we were asked to do hardware stamping and such a time stamp is
 748  * available, then it must have been for this skb here because we only
 749  * allow only one such packet into the queue.
 750  **/
 751 static void igb_ptp_tx_hwtstamp(struct igb_adapter *adapter)
 752 {
 753         struct sk_buff *skb = adapter->ptp_tx_skb;
 754         struct e1000_hw *hw = &adapter->hw;
 755         struct skb_shared_hwtstamps shhwtstamps;
 756         u64 regval;
 757         int adjust = 0;
 758
 759         regval = rd32(E1000_TXSTMPL);
 760         regval |= (u64)rd32(E1000_TXSTMPH) << 32;
 761
 762         igb_ptp_systim_to_hwtstamp(adapter, &shhwtstamps, regval);
 763         /* adjust timestamp for the TX latency based on link speed */
 764         if (adapter->hw.mac.type == e1000_i210) {
 765                 switch (adapter->link_speed) {
 766                 case SPEED_10:
 767                         adjust = IGB_I210_TX_LATENCY_10;
 768                         break;
 769                 case SPEED_100:
 770                         adjust = IGB_I210_TX_LATENCY_100;
 771                         break;
 772                 case SPEED_1000:
 773                         adjust = IGB_I210_TX_LATENCY_1000;
 774                         break;
 775                 }
 776         }
 777
 778         shhwtstamps.hwtstamp =
 779                 ktime_add_ns(shhwtstamps.hwtstamp, adjust);
 780
 781         /* Clear the lock early before calling skb_tstamp_tx so that
 782          * applications are not woken up before the lock bit is clear. We use
 783          * a copy of the skb pointer to ensure other threads can't change it
 784          * while we're notifying the stack.
 785          */
 786         adapter->ptp_tx_skb = NULL;
 787         clear_bit_unlock(__IGB_PTP_TX_IN_PROGRESS, &adapter->state);
 788
 789         /* Notify the stack and free the skb after we've unlocked */
 790         skb_tstamp_tx(skb, &shhwtstamps);
 791         dev_kfree_skb_any(skb);
 792 }
 793
 794 /**
 795  * igb_ptp_rx_pktstamp - retrieve Rx per packet timestamp
 796  * @q_vector: Pointer to interrupt specific structure
 797  * @va: Pointer to address containing Rx buffer
 798  * @skb: Buffer containing timestamp and packet
 799  *
 800  * This function is meant to retrieve a timestamp from the first buffer of an
 801  * incoming frame.  The value is stored in little endian format starting on
 802  * byte 8.
 803  **/
 804 void igb_ptp_rx_pktstamp(struct igb_q_vector *q_vector, void *va,
 805                          struct sk_buff *skb)
 806 {
 807         __le64 *regval = (__le64 *)va;
 808         struct igb_adapter *adapter = q_vector->adapter;
 809         int adjust = 0;
 810
 811         /* The timestamp is recorded in little endian format.
 812          * DWORD: 0        1        2        3
 813          * Field: Reserved Reserved SYSTIML  SYSTIMH
 814          */
 815         igb_ptp_systim_to_hwtstamp(adapter, skb_hwtstamps(skb),
 816                                    le64_to_cpu(regval[1]));
 817
 818         /* adjust timestamp for the RX latency based on link speed */
 819         if (adapter->hw.mac.type == e1000_i210) {
 820                 switch (adapter->link_speed) {
 821                 case SPEED_10:
 822                         adjust = IGB_I210_RX_LATENCY_10;
 823                         break;
 824                 case SPEED_100:
 825                         adjust = IGB_I210_RX_LATENCY_100;
 826                         break;
 827                 case SPEED_1000:
 828                         adjust = IGB_I210_RX_LATENCY_1000;
 829                         break;
 830                 }
 831         }
 832         skb_hwtstamps(skb)->hwtstamp =
 833                 ktime_sub_ns(skb_hwtstamps(skb)->hwtstamp, adjust);
 834 }
 835
 836 /**
 837  * igb_ptp_rx_rgtstamp - retrieve Rx timestamp stored in register
 838  * @q_vector: Pointer to interrupt specific structure
 839  * @skb: Buffer containing timestamp and packet
 840  *
 841  * This function is meant to retrieve a timestamp from the internal registers
 842  * of the adapter and store it in the skb.
 843  **/
 844 void igb_ptp_rx_rgtstamp(struct igb_q_vector *q_vector,
 845                          struct sk_buff *skb)
 846 {
 847         struct igb_adapter *adapter = q_vector->adapter;
 848         struct e1000_hw *hw = &adapter->hw;
 849         u64 regval;
 850         int adjust = 0;
 851
 852         /* If this bit is set, then the RX registers contain the time stamp. No
 853          * other packet will be time stamped until we read these registers, so
 854          * read the registers to make them available again. Because only one
 855          * packet can be time stamped at a time, we know that the register
 856          * values must belong to this one here and therefore we don't need to
 857          * compare any of the additional attributes stored for it.
 858          *
 859          * If nothing went wrong, then it should have a shared tx_flags that we
 860          * can turn into a skb_shared_hwtstamps.
 861          */
 862         if (!(rd32(E1000_TSYNCRXCTL) & E1000_TSYNCRXCTL_VALID))
 863                 return;
 864
 865         regval = rd32(E1000_RXSTMPL);
 866         regval |= (u64)rd32(E1000_RXSTMPH) << 32;
 867
 868         igb_ptp_systim_to_hwtstamp(adapter, skb_hwtstamps(skb), regval);
 869
 870         /* adjust timestamp for the RX latency based on link speed */
 871         if (adapter->hw.mac.type == e1000_i210) {
 872                 switch (adapter->link_speed) {
 873                 case SPEED_10:
 874                         adjust = IGB_I210_RX_LATENCY_10;
 875                         break;
 876                 case SPEED_100:
 877                         adjust = IGB_I210_RX_LATENCY_100;
 878                         break;
 879                 case SPEED_1000:
 880                         adjust = IGB_I210_RX_LATENCY_1000;
 881                         break;
 882                 }
 883         }
 884         skb_hwtstamps(skb)->hwtstamp =
 885                 ktime_sub_ns(skb_hwtstamps(skb)->hwtstamp, adjust);
 886
 887         /* Update the last_rx_timestamp timer in order to enable watchdog check
 888          * for error case of latched timestamp on a dropped packet.
 889          */
 890         adapter->last_rx_timestamp = jiffies;
 891 }
 892
 893 /**
 894  * igb_ptp_get_ts_config - get hardware time stamping config
 895  * @netdev:
 896  * @ifreq:
 897  *
 898  * Get the hwtstamp_config settings to return to the user. Rather than attempt
 899  * to deconstruct the settings from the registers, just return a shadow copy
 900  * of the last known settings.
 901  **/
 902 int igb_ptp_get_ts_config(struct net_device *netdev, struct ifreq *ifr)
 903 {
 904         struct igb_adapter *adapter = netdev_priv(netdev);
 905         struct hwtstamp_config *config = &adapter->tstamp_config;
 906
 907         return copy_to_user(ifr->ifr_data, config, sizeof(*config)) ?
 908                 -EFAULT : 0;
 909 }
 910
 911 /**
 912  * igb_ptp_set_timestamp_mode - setup hardware for timestamping
 913  * @adapter: networking device structure
 914  * @config: hwtstamp configuration
 915  *
 916  * Outgoing time stamping can be enabled and disabled. Play nice and
 917  * disable it when requested, although it shouldn't case any overhead
 918  * when no packet needs it. At most one packet in the queue may be
 919  * marked for time stamping, otherwise it would be impossible to tell
 920  * for sure to which packet the hardware time stamp belongs.
 921  *
 922  * Incoming time stamping has to be configured via the hardware
 923  * filters. Not all combinations are supported, in particular event
 924  * type has to be specified. Matching the kind of event packet is
 925  * not supported, with the exception of "all V2 events regardless of
 926  * level 2 or 4".
 927  */
 928 static int igb_ptp_set_timestamp_mode(struct igb_adapter *adapter,
 929                                       struct hwtstamp_config *config)
 930 {
 931         struct e1000_hw *hw = &adapter->hw;
 932         u32 tsync_tx_ctl = E1000_TSYNCTXCTL_ENABLED;
 933         u32 tsync_rx_ctl = E1000_TSYNCRXCTL_ENABLED;
 934         u32 tsync_rx_cfg = 0;
 935         bool is_l4 = false;
 936         bool is_l2 = false;
 937         u32 regval;
 938
 939         /* reserved for future extensions */
 940         if (config->flags)
 941                 return -EINVAL;
 942
 943         switch (config->tx_type) {
 944         case HWTSTAMP_TX_OFF:
 945                 tsync_tx_ctl = 0;
 946         case HWTSTAMP_TX_ON:
 947                 break;
 948         default:
 949                 return -ERANGE;
 950         }
 951
 952         switch (config->rx_filter) {
 953         case HWTSTAMP_FILTER_NONE:
 954                 tsync_rx_ctl = 0;
 955                 break;
 956         case HWTSTAMP_FILTER_PTP_V1_L4_SYNC:
 957                 tsync_rx_ctl |= E1000_TSYNCRXCTL_TYPE_L4_V1;
 958                 tsync_rx_cfg = E1000_TSYNCRXCFG_PTP_V1_SYNC_MESSAGE;
 959                 is_l4 = true;
 960                 break;
 961         case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ:
 962                 tsync_rx_ctl |= E1000_TSYNCRXCTL_TYPE_L4_V1;
 963                 tsync_rx_cfg = E1000_TSYNCRXCFG_PTP_V1_DELAY_REQ_MESSAGE;
 964                 is_l4 = true;
 965                 break;
 966         case HWTSTAMP_FILTER_PTP_V2_EVENT:
 967         case HWTSTAMP_FILTER_PTP_V2_L2_EVENT:
 968         case HWTSTAMP_FILTER_PTP_V2_L4_EVENT:
 969         case HWTSTAMP_FILTER_PTP_V2_SYNC:
 970         case HWTSTAMP_FILTER_PTP_V2_L2_SYNC:
 971         case HWTSTAMP_FILTER_PTP_V2_L4_SYNC:
 972         case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ:
 973         case HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ:
 974         case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ:
 975                 tsync_rx_ctl |= E1000_TSYNCRXCTL_TYPE_EVENT_V2;
 976                 config->rx_filter = HWTSTAMP_FILTER_PTP_V2_EVENT;
 977                 is_l2 = true;
 978                 is_l4 = true;
 979                 break;
 980         case HWTSTAMP_FILTER_PTP_V1_L4_EVENT:
 981         case HWTSTAMP_FILTER_NTP_ALL:
 982         case HWTSTAMP_FILTER_ALL:
 983                 /* 82576 cannot timestamp all packets, which it needs to do to
 984                  * support both V1 Sync and Delay_Req messages
 985                  */
 986                 if (hw->mac.type != e1000_82576) {
 987                         tsync_rx_ctl |= E1000_TSYNCRXCTL_TYPE_ALL;
 988                         config->rx_filter = HWTSTAMP_FILTER_ALL;
 989                         break;
 990                 }
 991                 /* fall through */
 992         default:
 993                 config->rx_filter = HWTSTAMP_FILTER_NONE;
 994                 return -ERANGE;
 995         }
 996
 997         if (hw->mac.type == e1000_82575) {
 998                 if (tsync_rx_ctl | tsync_tx_ctl)
 999                         return -EINVAL;
1000                 return 0;
1001         }
1002
1003         /* Per-packet timestamping only works if all packets are
1004          * timestamped, so enable timestamping in all packets as
1005          * long as one Rx filter was configured.
1006          */
1007         if ((hw->mac.type >= e1000_82580) && tsync_rx_ctl) {
1008                 tsync_rx_ctl = E1000_TSYNCRXCTL_ENABLED;
1009                 tsync_rx_ctl |= E1000_TSYNCRXCTL_TYPE_ALL;
1010                 config->rx_filter = HWTSTAMP_FILTER_ALL;
1011                 is_l2 = true;
1012                 is_l4 = true;
1013
1014                 if ((hw->mac.type == e1000_i210) ||
1015                     (hw->mac.type == e1000_i211)) {
1016                         regval = rd32(E1000_RXPBS);
1017                         regval |= E1000_RXPBS_CFG_TS_EN;
1018                         wr32(E1000_RXPBS, regval);
1019                 }
1020         }
1021
1022         /* enable/disable TX */
1023         regval = rd32(E1000_TSYNCTXCTL);
1024         regval &= ~E1000_TSYNCTXCTL_ENABLED;
1025         regval |= tsync_tx_ctl;
1026         wr32(E1000_TSYNCTXCTL, regval);
1027
1028         /* enable/disable RX */
1029         regval = rd32(E1000_TSYNCRXCTL);
1030         regval &= ~(E1000_TSYNCRXCTL_ENABLED | E1000_TSYNCRXCTL_TYPE_MASK);
1031         regval |= tsync_rx_ctl;
1032         wr32(E1000_TSYNCRXCTL, regval);
1033
1034         /* define which PTP packets are time stamped */
1035         wr32(E1000_TSYNCRXCFG, tsync_rx_cfg);
1036
1037         /* define ethertype filter for timestamped packets */
1038         if (is_l2)
1039                 wr32(E1000_ETQF(IGB_ETQF_FILTER_1588),
1040                      (E1000_ETQF_FILTER_ENABLE | /* enable filter */
1041                       E1000_ETQF_1588 | /* enable timestamping */
1042                       ETH_P_1588));     /* 1588 eth protocol type */
1043         else
1044                 wr32(E1000_ETQF(IGB_ETQF_FILTER_1588), 0);
1045
1046         /* L4 Queue Filter[3]: filter by destination port and protocol */
1047         if (is_l4) {
1048                 u32 ftqf = (IPPROTO_UDP /* UDP */
1049                         | E1000_FTQF_VF_BP /* VF not compared */
1050                         | E1000_FTQF_1588_TIME_STAMP /* Enable Timestamping */
1051                         | E1000_FTQF_MASK); /* mask all inputs */
1052                 ftqf &= ~E1000_FTQF_MASK_PROTO_BP; /* enable protocol check */
1053
1054                 wr32(E1000_IMIR(3), htons(PTP_EV_PORT));
1055                 wr32(E1000_IMIREXT(3),
1056                      (E1000_IMIREXT_SIZE_BP | E1000_IMIREXT_CTRL_BP));
1057                 if (hw->mac.type == e1000_82576) {
1058                         /* enable source port check */
1059                         wr32(E1000_SPQF(3), htons(PTP_EV_PORT));
1060                         ftqf &= ~E1000_FTQF_MASK_SOURCE_PORT_BP;
1061                 }
1062                 wr32(E1000_FTQF(3), ftqf);
1063         } else {
1064                 wr32(E1000_FTQF(3), E1000_FTQF_MASK);
1065         }
1066         wrfl();
1067
1068         /* clear TX/RX time stamp registers, just to be sure */
1069         regval = rd32(E1000_TXSTMPL);
1070         regval = rd32(E1000_TXSTMPH);
1071         regval = rd32(E1000_RXSTMPL);
1072         regval = rd32(E1000_RXSTMPH);
1073
1074         return 0;
1075 }
1076
1077 /**
1078  * igb_ptp_set_ts_config - set hardware time stamping config
1079  * @netdev:
1080  * @ifreq:
1081  *
1082  **/
1083 int igb_ptp_set_ts_config(struct net_device *netdev, struct ifreq *ifr)
1084 {
1085         struct igb_adapter *adapter = netdev_priv(netdev);
1086         struct hwtstamp_config config;
1087         int err;
1088
1089         if (copy_from_user(&config, ifr->ifr_data, sizeof(config)))
1090                 return -EFAULT;
1091
1092         err = igb_ptp_set_timestamp_mode(adapter, &config);
1093         if (err)
1094                 return err;
1095
1096         /* save these settings for future reference */
1097         memcpy(&adapter->tstamp_config, &config,
1098                sizeof(adapter->tstamp_config));
1099
1100         return copy_to_user(ifr->ifr_data, &config, sizeof(config)) ?
1101                 -EFAULT : 0;
1102 }
1103
1104 /**
1105  * igb_ptp_init - Initialize PTP functionality
1106  * @adapter: Board private structure
1107  *
1108  * This function is called at device probe to initialize the PTP
1109  * functionality.
1110  */
1111 void igb_ptp_init(struct igb_adapter *adapter)
1112 {
1113         struct e1000_hw *hw = &adapter->hw;
1114         struct net_device *netdev = adapter->netdev;
1115         int i;
1116
1117         switch (hw->mac.type) {
1118         case e1000_82576:
1119                 snprintf(adapter->ptp_caps.name, 16, "%pm", netdev->dev_addr);
1120                 adapter->ptp_caps.owner = THIS_MODULE;
1121                 adapter->ptp_caps.max_adj = 999999881;
1122                 adapter->ptp_caps.n_ext_ts = 0;
1123                 adapter->ptp_caps.pps = 0;
1124                 adapter->ptp_caps.adjfreq = igb_ptp_adjfreq_82576;
1125                 adapter->ptp_caps.adjtime = igb_ptp_adjtime_82576;
1126                 adapter->ptp_caps.gettime64 = igb_ptp_gettime_82576;
1127                 adapter->ptp_caps.settime64 = igb_ptp_settime_82576;
1128                 adapter->ptp_caps.enable = igb_ptp_feature_enable;
1129                 adapter->cc.read = igb_ptp_read_82576;
1130                 adapter->cc.mask = CYCLECOUNTER_MASK(64);
1131                 adapter->cc.mult = 1;
1132                 adapter->cc.shift = IGB_82576_TSYNC_SHIFT;
1133                 adapter->ptp_flags |= IGB_PTP_OVERFLOW_CHECK;
1134                 break;
1135         case e1000_82580:
1136         case e1000_i354:
1137         case e1000_i350:
1138                 snprintf(adapter->ptp_caps.name, 16, "%pm", netdev->dev_addr);
1139                 adapter->ptp_caps.owner = THIS_MODULE;
1140                 adapter->ptp_caps.max_adj = 62499999;
1141                 adapter->ptp_caps.n_ext_ts = 0;
1142                 adapter->ptp_caps.pps = 0;
1143                 adapter->ptp_caps.adjfine = igb_ptp_adjfine_82580;
1144                 adapter->ptp_caps.adjtime = igb_ptp_adjtime_82576;
1145                 adapter->ptp_caps.gettime64 = igb_ptp_gettime_82576;
1146                 adapter->ptp_caps.settime64 = igb_ptp_settime_82576;
1147                 adapter->ptp_caps.enable = igb_ptp_feature_enable;
1148                 adapter->cc.read = igb_ptp_read_82580;
1149                 adapter->cc.mask = CYCLECOUNTER_MASK(IGB_NBITS_82580);
1150                 adapter->cc.mult = 1;
1151                 adapter->cc.shift = 0;
1152                 adapter->ptp_flags |= IGB_PTP_OVERFLOW_CHECK;
1153                 break;
1154         case e1000_i210:
1155         case e1000_i211:
1156                 for (i = 0; i < IGB_N_SDP; i++) {
1157                         struct ptp_pin_desc *ppd = &adapter->sdp_config[i];
1158
1159                         snprintf(ppd->name, sizeof(ppd->name), "SDP%d", i);
1160                         ppd->index = i;
1161                         ppd->func = PTP_PF_NONE;
1162                 }
1163                 snprintf(adapter->ptp_caps.name, 16, "%pm", netdev->dev_addr);
1164                 adapter->ptp_caps.owner = THIS_MODULE;
1165                 adapter->ptp_caps.max_adj = 62499999;
1166                 adapter->ptp_caps.n_ext_ts = IGB_N_EXTTS;
1167                 adapter->ptp_caps.n_per_out = IGB_N_PEROUT;
1168                 adapter->ptp_caps.n_pins = IGB_N_SDP;
1169                 adapter->ptp_caps.pps = 1;
1170                 adapter->ptp_caps.pin_config = adapter->sdp_config;
1171                 adapter->ptp_caps.adjfine = igb_ptp_adjfine_82580;
1172                 adapter->ptp_caps.adjtime = igb_ptp_adjtime_i210;
1173                 adapter->ptp_caps.gettime64 = igb_ptp_gettime_i210;
1174                 adapter->ptp_caps.settime64 = igb_ptp_settime_i210;
1175                 adapter->ptp_caps.enable = igb_ptp_feature_enable_i210;
1176                 adapter->ptp_caps.verify = igb_ptp_verify_pin;
1177                 break;
1178         default:
1179                 adapter->ptp_clock = NULL;
1180                 return;
1181         }
1182
1183         spin_lock_init(&adapter->tmreg_lock);
1184         INIT_WORK(&adapter->ptp_tx_work, igb_ptp_tx_work);
1185
1186         if (adapter->ptp_flags & IGB_PTP_OVERFLOW_CHECK)
1187                 INIT_DELAYED_WORK(&adapter->ptp_overflow_work,
1188                                   igb_ptp_overflow_check);
1189
1190         adapter->tstamp_config.rx_filter = HWTSTAMP_FILTER_NONE;
1191         adapter->tstamp_config.tx_type = HWTSTAMP_TX_OFF;
1192
1193         igb_ptp_reset(adapter);
1194
1195         adapter->ptp_clock = ptp_clock_register(&adapter->ptp_caps,
1196                                                 &adapter->pdev->dev);
1197         if (IS_ERR(adapter->ptp_clock)) {
1198                 adapter->ptp_clock = NULL;
1199                 dev_err(&adapter->pdev->dev, "ptp_clock_register failed\n");
1200         } else if (adapter->ptp_clock) {
1201                 dev_info(&adapter->pdev->dev, "added PHC on %s\n",
1202                          adapter->netdev->name);
1203                 adapter->ptp_flags |= IGB_PTP_ENABLED;
1204         }
1205 }
1206
1207 /**
1208  * igb_ptp_suspend - Disable PTP work items and prepare for suspend
1209  * @adapter: Board private structure
1210  *
1211  * This function stops the overflow check work and PTP Tx timestamp work, and
1212  * will prepare the device for OS suspend.
1213  */
1214 void igb_ptp_suspend(struct igb_adapter *adapter)
1215 {
1216         if (!(adapter->ptp_flags & IGB_PTP_ENABLED))
1217                 return;
1218
1219         if (adapter->ptp_flags & IGB_PTP_OVERFLOW_CHECK)
1220                 cancel_delayed_work_sync(&adapter->ptp_overflow_work);
1221
1222         cancel_work_sync(&adapter->ptp_tx_work);
1223         if (adapter->ptp_tx_skb) {
1224                 dev_kfree_skb_any(adapter->ptp_tx_skb);
1225                 adapter->ptp_tx_skb = NULL;
1226                 clear_bit_unlock(__IGB_PTP_TX_IN_PROGRESS, &adapter->state);
1227         }
1228 }
1229
1230 /**
1231  * igb_ptp_stop - Disable PTP device and stop the overflow check.
1232  * @adapter: Board private structure.
1233  *
1234  * This function stops the PTP support and cancels the delayed work.
1235  **/
1236 void igb_ptp_stop(struct igb_adapter *adapter)
1237 {
1238         igb_ptp_suspend(adapter);
1239
1240         if (adapter->ptp_clock) {
1241                 ptp_clock_unregister(adapter->ptp_clock);
1242                 dev_info(&adapter->pdev->dev, "removed PHC on %s\n",
1243                          adapter->netdev->name);
1244                 adapter->ptp_flags &= ~IGB_PTP_ENABLED;
1245         }
1246 }
1247
1248 /**
1249  * igb_ptp_reset - Re-enable the adapter for PTP following a reset.
1250  * @adapter: Board private structure.
1251  *
1252  * This function handles the reset work required to re-enable the PTP device.
1253  **/
1254 void igb_ptp_reset(struct igb_adapter *adapter)
1255 {
1256         struct e1000_hw *hw = &adapter->hw;
1257         unsigned long flags;
1258
1259         /* reset the tstamp_config */
1260         igb_ptp_set_timestamp_mode(adapter, &adapter->tstamp_config);
1261
1262         spin_lock_irqsave(&adapter->tmreg_lock, flags);
1263
1264         switch (adapter->hw.mac.type) {
1265         case e1000_82576:
1266                 /* Dial the nominal frequency. */
1267                 wr32(E1000_TIMINCA, INCPERIOD_82576 | INCVALUE_82576);
1268                 break;
1269         case e1000_82580:
1270         case e1000_i354:
1271         case e1000_i350:
1272         case e1000_i210:
1273         case e1000_i211:
1274                 wr32(E1000_TSAUXC, 0x0);
1275                 wr32(E1000_TSSDP, 0x0);
1276                 wr32(E1000_TSIM,
1277                      TSYNC_INTERRUPTS |
1278                      (adapter->pps_sys_wrap_on ? TSINTR_SYS_WRAP : 0));
1279                 wr32(E1000_IMS, E1000_IMS_TS);
1280                 break;
1281         default:
1282                 /* No work to do. */
1283                 goto out;
1284         }
1285
1286         /* Re-initialize the timer. */
1287         if ((hw->mac.type == e1000_i210) || (hw->mac.type == e1000_i211)) {
1288                 struct timespec64 ts = ktime_to_timespec64(ktime_get_real());
1289
1290                 igb_ptp_write_i210(adapter, &ts);
1291         } else {
1292                 timecounter_init(&adapter->tc, &adapter->cc,
1293                                  ktime_to_ns(ktime_get_real()));
1294         }
1295 out:
1296         spin_unlock_irqrestore(&adapter->tmreg_lock, flags);
1297
1298         wrfl();
1299
1300         if (adapter->ptp_flags & IGB_PTP_OVERFLOW_CHECK)
1301                 schedule_delayed_work(&adapter->ptp_overflow_work,
1302                                       IGB_SYSTIM_OVERFLOW_PERIOD);
1303 }