1b980ac18SJeff Kirsher /* PTP Hardware Clock (PHC) driver for the Intel 82576 and 82580 2d339b133SRichard Cochran * 3d339b133SRichard Cochran * Copyright (C) 2011 Richard Cochran <richardcochran@gmail.com> 4d339b133SRichard Cochran * 5d339b133SRichard Cochran * This program is free software; you can redistribute it and/or modify 6d339b133SRichard Cochran * it under the terms of the GNU General Public License as published by 7d339b133SRichard Cochran * the Free Software Foundation; either version 2 of the License, or 8d339b133SRichard Cochran * (at your option) any later version. 9d339b133SRichard Cochran * 10d339b133SRichard Cochran * This program is distributed in the hope that it will be useful, 11d339b133SRichard Cochran * but WITHOUT ANY WARRANTY; without even the implied warranty of 12d339b133SRichard Cochran * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13d339b133SRichard Cochran * GNU General Public License for more details. 14d339b133SRichard Cochran * 1574cfb2e1SCarolyn Wyborny * You should have received a copy of the GNU General Public License along with 1674cfb2e1SCarolyn Wyborny * this program; if not, see <http://www.gnu.org/licenses/>. 17d339b133SRichard Cochran */ 18d339b133SRichard Cochran #include <linux/module.h> 19d339b133SRichard Cochran #include <linux/device.h> 20d339b133SRichard Cochran #include <linux/pci.h> 21ba59814bSMatthew Vick #include <linux/ptp_classify.h> 22d339b133SRichard Cochran 23d339b133SRichard Cochran #include "igb.h" 24d339b133SRichard Cochran 25d339b133SRichard Cochran #define INCVALUE_MASK 0x7fffffff 26d339b133SRichard Cochran #define ISGN 0x80000000 27d339b133SRichard Cochran 28b980ac18SJeff Kirsher /* The 82580 timesync updates the system timer every 8ns by 8ns, 297ebae817SRichard Cochran * and this update value cannot be reprogrammed. 307ebae817SRichard Cochran * 31d339b133SRichard Cochran * Neither the 82576 nor the 82580 offer registers wide enough to hold 32d339b133SRichard Cochran * nanoseconds time values for very long. For the 82580, SYSTIM always 33dbedd44eSJoe Perches * counts nanoseconds, but the upper 24 bits are not available. The 34d339b133SRichard Cochran * frequency is adjusted by changing the 32 bit fractional nanoseconds 35d339b133SRichard Cochran * register, TIMINCA. 36d339b133SRichard Cochran * 37d339b133SRichard Cochran * For the 82576, the SYSTIM register time unit is affect by the 38d339b133SRichard Cochran * choice of the 24 bit TININCA:IV (incvalue) field. Five bits of this 39d339b133SRichard Cochran * field are needed to provide the nominal 16 nanosecond period, 40d339b133SRichard Cochran * leaving 19 bits for fractional nanoseconds. 41d339b133SRichard Cochran * 427ebae817SRichard Cochran * We scale the NIC clock cycle by a large factor so that relatively 437ebae817SRichard Cochran * small clock corrections can be added or subtracted at each clock 447ebae817SRichard Cochran * tick. The drawbacks of a large factor are a) that the clock 457ebae817SRichard Cochran * register overflows more quickly (not such a big deal) and b) that 467ebae817SRichard Cochran * the increment per tick has to fit into 24 bits. As a result we 477ebae817SRichard Cochran * need to use a shift of 19 so we can fit a value of 16 into the 487ebae817SRichard Cochran * TIMINCA register. 497ebae817SRichard Cochran * 50d339b133SRichard Cochran * 51d339b133SRichard Cochran * SYSTIMH SYSTIML 52d339b133SRichard Cochran * +--------------+ +---+---+------+ 53d339b133SRichard Cochran * 82576 | 32 | | 8 | 5 | 19 | 54d339b133SRichard Cochran * +--------------+ +---+---+------+ 55d339b133SRichard Cochran * \________ 45 bits _______/ fract 56d339b133SRichard Cochran * 57d339b133SRichard Cochran * +----------+---+ +--------------+ 58d339b133SRichard Cochran * 82580 | 24 | 8 | | 32 | 59d339b133SRichard Cochran * +----------+---+ +--------------+ 60d339b133SRichard Cochran * reserved \______ 40 bits _____/ 61d339b133SRichard Cochran * 62d339b133SRichard Cochran * 63d339b133SRichard Cochran * The 45 bit 82576 SYSTIM overflows every 64d339b133SRichard Cochran * 2^45 * 10^-9 / 3600 = 9.77 hours. 65d339b133SRichard Cochran * 66d339b133SRichard Cochran * The 40 bit 82580 SYSTIM overflows every 67d339b133SRichard Cochran * 2^40 * 10^-9 / 60 = 18.3 minutes. 68d339b133SRichard Cochran */ 69d339b133SRichard Cochran 70a79f4f88SMatthew Vick #define IGB_SYSTIM_OVERFLOW_PERIOD (HZ * 60 * 9) 71428f1f71SMatthew Vick #define IGB_PTP_TX_TIMEOUT (HZ * 15) 72d339b133SRichard Cochran #define INCPERIOD_82576 (1 << E1000_TIMINCA_16NS_SHIFT) 73d339b133SRichard Cochran #define INCVALUE_82576_MASK ((1 << E1000_TIMINCA_16NS_SHIFT) - 1) 74d339b133SRichard Cochran #define INCVALUE_82576 (16 << IGB_82576_TSYNC_SHIFT) 75d339b133SRichard Cochran #define IGB_NBITS_82580 40 76d339b133SRichard Cochran 77167f3f71SJeff Kirsher static void igb_ptp_tx_hwtstamp(struct igb_adapter *adapter); 78167f3f71SJeff Kirsher 79b980ac18SJeff Kirsher /* SYSTIM read access for the 82576 */ 80a79f4f88SMatthew Vick static cycle_t igb_ptp_read_82576(const struct cyclecounter *cc) 81d339b133SRichard Cochran { 82d339b133SRichard Cochran struct igb_adapter *igb = container_of(cc, struct igb_adapter, cc); 83d339b133SRichard Cochran struct e1000_hw *hw = &igb->hw; 84a79f4f88SMatthew Vick u64 val; 85a79f4f88SMatthew Vick u32 lo, hi; 86d339b133SRichard Cochran 87d339b133SRichard Cochran lo = rd32(E1000_SYSTIML); 88d339b133SRichard Cochran hi = rd32(E1000_SYSTIMH); 89d339b133SRichard Cochran 90d339b133SRichard Cochran val = ((u64) hi) << 32; 91d339b133SRichard Cochran val |= lo; 92d339b133SRichard Cochran 93d339b133SRichard Cochran return val; 94d339b133SRichard Cochran } 95d339b133SRichard Cochran 96b980ac18SJeff Kirsher /* SYSTIM read access for the 82580 */ 97a79f4f88SMatthew Vick static cycle_t igb_ptp_read_82580(const struct cyclecounter *cc) 98d339b133SRichard Cochran { 99d339b133SRichard Cochran struct igb_adapter *igb = container_of(cc, struct igb_adapter, cc); 100d339b133SRichard Cochran struct e1000_hw *hw = &igb->hw; 101e5c3370fSAkeem G Abodunrin u32 lo, hi; 102a79f4f88SMatthew Vick u64 val; 103d339b133SRichard Cochran 104b980ac18SJeff Kirsher /* The timestamp latches on lowest register read. For the 82580 1057ebae817SRichard Cochran * the lowest register is SYSTIMR instead of SYSTIML. However we only 1067ebae817SRichard Cochran * need to provide nanosecond resolution, so we just ignore it. 1077ebae817SRichard Cochran */ 108e5c3370fSAkeem G Abodunrin rd32(E1000_SYSTIMR); 109d339b133SRichard Cochran lo = rd32(E1000_SYSTIML); 110d339b133SRichard Cochran hi = rd32(E1000_SYSTIMH); 111d339b133SRichard Cochran 112d339b133SRichard Cochran val = ((u64) hi) << 32; 113d339b133SRichard Cochran val |= lo; 114d339b133SRichard Cochran 115d339b133SRichard Cochran return val; 116d339b133SRichard Cochran } 117d339b133SRichard Cochran 118b980ac18SJeff Kirsher /* SYSTIM read access for I210/I211 */ 119d4c496feSRichard Cochran static void igb_ptp_read_i210(struct igb_adapter *adapter, 120d4c496feSRichard Cochran struct timespec64 *ts) 121e57b8bdbSMatthew Vick { 122e57b8bdbSMatthew Vick struct e1000_hw *hw = &adapter->hw; 123e5c3370fSAkeem G Abodunrin u32 sec, nsec; 124e57b8bdbSMatthew Vick 125b980ac18SJeff Kirsher /* The timestamp latches on lowest register read. For I210/I211, the 126e57b8bdbSMatthew Vick * lowest register is SYSTIMR. Since we only need to provide nanosecond 127e57b8bdbSMatthew Vick * resolution, we can ignore it. 128e57b8bdbSMatthew Vick */ 129e5c3370fSAkeem G Abodunrin rd32(E1000_SYSTIMR); 130e57b8bdbSMatthew Vick nsec = rd32(E1000_SYSTIML); 131e57b8bdbSMatthew Vick sec = rd32(E1000_SYSTIMH); 132e57b8bdbSMatthew Vick 133e57b8bdbSMatthew Vick ts->tv_sec = sec; 134e57b8bdbSMatthew Vick ts->tv_nsec = nsec; 135e57b8bdbSMatthew Vick } 136e57b8bdbSMatthew Vick 137e57b8bdbSMatthew Vick static void igb_ptp_write_i210(struct igb_adapter *adapter, 138d4c496feSRichard Cochran const struct timespec64 *ts) 139e57b8bdbSMatthew Vick { 140e57b8bdbSMatthew Vick struct e1000_hw *hw = &adapter->hw; 141e57b8bdbSMatthew Vick 142b980ac18SJeff Kirsher /* Writing the SYSTIMR register is not necessary as it only provides 143e57b8bdbSMatthew Vick * sub-nanosecond resolution. 144e57b8bdbSMatthew Vick */ 145e57b8bdbSMatthew Vick wr32(E1000_SYSTIML, ts->tv_nsec); 146e57b8bdbSMatthew Vick wr32(E1000_SYSTIMH, ts->tv_sec); 147e57b8bdbSMatthew Vick } 148e57b8bdbSMatthew Vick 149a79f4f88SMatthew Vick /** 150a79f4f88SMatthew Vick * igb_ptp_systim_to_hwtstamp - convert system time value to hw timestamp 151a79f4f88SMatthew Vick * @adapter: board private structure 152a79f4f88SMatthew Vick * @hwtstamps: timestamp structure to update 153a79f4f88SMatthew Vick * @systim: unsigned 64bit system time value. 154a79f4f88SMatthew Vick * 155a79f4f88SMatthew Vick * We need to convert the system time value stored in the RX/TXSTMP registers 156a79f4f88SMatthew Vick * into a hwtstamp which can be used by the upper level timestamping functions. 157a79f4f88SMatthew Vick * 158a79f4f88SMatthew Vick * The 'tmreg_lock' spinlock is used to protect the consistency of the 159a79f4f88SMatthew Vick * system time value. This is needed because reading the 64 bit time 160a79f4f88SMatthew Vick * value involves reading two (or three) 32 bit registers. The first 161a79f4f88SMatthew Vick * read latches the value. Ditto for writing. 162a79f4f88SMatthew Vick * 163a79f4f88SMatthew Vick * In addition, here have extended the system time with an overflow 164a79f4f88SMatthew Vick * counter in software. 165a79f4f88SMatthew Vick **/ 166a79f4f88SMatthew Vick static void igb_ptp_systim_to_hwtstamp(struct igb_adapter *adapter, 167a79f4f88SMatthew Vick struct skb_shared_hwtstamps *hwtstamps, 168a79f4f88SMatthew Vick u64 systim) 169a79f4f88SMatthew Vick { 170a79f4f88SMatthew Vick unsigned long flags; 171a79f4f88SMatthew Vick u64 ns; 172a79f4f88SMatthew Vick 173a79f4f88SMatthew Vick switch (adapter->hw.mac.type) { 174a79f4f88SMatthew Vick case e1000_82576: 175e57b8bdbSMatthew Vick case e1000_82580: 176ceb5f13bSCarolyn Wyborny case e1000_i354: 177e57b8bdbSMatthew Vick case e1000_i350: 178a79f4f88SMatthew Vick spin_lock_irqsave(&adapter->tmreg_lock, flags); 179a79f4f88SMatthew Vick 180a79f4f88SMatthew Vick ns = timecounter_cyc2time(&adapter->tc, systim); 181a79f4f88SMatthew Vick 182a79f4f88SMatthew Vick spin_unlock_irqrestore(&adapter->tmreg_lock, flags); 183a79f4f88SMatthew Vick 184a79f4f88SMatthew Vick memset(hwtstamps, 0, sizeof(*hwtstamps)); 185a79f4f88SMatthew Vick hwtstamps->hwtstamp = ns_to_ktime(ns); 186e57b8bdbSMatthew Vick break; 187e57b8bdbSMatthew Vick case e1000_i210: 188e57b8bdbSMatthew Vick case e1000_i211: 189e57b8bdbSMatthew Vick memset(hwtstamps, 0, sizeof(*hwtstamps)); 190e57b8bdbSMatthew Vick /* Upper 32 bits contain s, lower 32 bits contain ns. */ 191e57b8bdbSMatthew Vick hwtstamps->hwtstamp = ktime_set(systim >> 32, 192e57b8bdbSMatthew Vick systim & 0xFFFFFFFF); 193e57b8bdbSMatthew Vick break; 194e57b8bdbSMatthew Vick default: 195e57b8bdbSMatthew Vick break; 196e57b8bdbSMatthew Vick } 197a79f4f88SMatthew Vick } 198a79f4f88SMatthew Vick 199b980ac18SJeff Kirsher /* PTP clock operations */ 200a79f4f88SMatthew Vick static int igb_ptp_adjfreq_82576(struct ptp_clock_info *ptp, s32 ppb) 201d339b133SRichard Cochran { 202a79f4f88SMatthew Vick struct igb_adapter *igb = container_of(ptp, struct igb_adapter, 203a79f4f88SMatthew Vick ptp_caps); 204a79f4f88SMatthew Vick struct e1000_hw *hw = &igb->hw; 205a79f4f88SMatthew Vick int neg_adj = 0; 206d339b133SRichard Cochran u64 rate; 207d339b133SRichard Cochran u32 incvalue; 208d339b133SRichard Cochran 209d339b133SRichard Cochran if (ppb < 0) { 210d339b133SRichard Cochran neg_adj = 1; 211d339b133SRichard Cochran ppb = -ppb; 212d339b133SRichard Cochran } 213d339b133SRichard Cochran rate = ppb; 214d339b133SRichard Cochran rate <<= 14; 215d339b133SRichard Cochran rate = div_u64(rate, 1953125); 216d339b133SRichard Cochran 217d339b133SRichard Cochran incvalue = 16 << IGB_82576_TSYNC_SHIFT; 218d339b133SRichard Cochran 219d339b133SRichard Cochran if (neg_adj) 220d339b133SRichard Cochran incvalue -= rate; 221d339b133SRichard Cochran else 222d339b133SRichard Cochran incvalue += rate; 223d339b133SRichard Cochran 224d339b133SRichard Cochran wr32(E1000_TIMINCA, INCPERIOD_82576 | (incvalue & INCVALUE_82576_MASK)); 225d339b133SRichard Cochran 226d339b133SRichard Cochran return 0; 227d339b133SRichard Cochran } 228d339b133SRichard Cochran 229a79f4f88SMatthew Vick static int igb_ptp_adjfreq_82580(struct ptp_clock_info *ptp, s32 ppb) 230d339b133SRichard Cochran { 231a79f4f88SMatthew Vick struct igb_adapter *igb = container_of(ptp, struct igb_adapter, 232a79f4f88SMatthew Vick ptp_caps); 233a79f4f88SMatthew Vick struct e1000_hw *hw = &igb->hw; 234a79f4f88SMatthew Vick int neg_adj = 0; 235d339b133SRichard Cochran u64 rate; 236d339b133SRichard Cochran u32 inca; 237d339b133SRichard Cochran 238d339b133SRichard Cochran if (ppb < 0) { 239d339b133SRichard Cochran neg_adj = 1; 240d339b133SRichard Cochran ppb = -ppb; 241d339b133SRichard Cochran } 242d339b133SRichard Cochran rate = ppb; 243d339b133SRichard Cochran rate <<= 26; 244d339b133SRichard Cochran rate = div_u64(rate, 1953125); 245d339b133SRichard Cochran 246d339b133SRichard Cochran inca = rate & INCVALUE_MASK; 247d339b133SRichard Cochran if (neg_adj) 248d339b133SRichard Cochran inca |= ISGN; 249d339b133SRichard Cochran 250d339b133SRichard Cochran wr32(E1000_TIMINCA, inca); 251d339b133SRichard Cochran 252d339b133SRichard Cochran return 0; 253d339b133SRichard Cochran } 254d339b133SRichard Cochran 255e57b8bdbSMatthew Vick static int igb_ptp_adjtime_82576(struct ptp_clock_info *ptp, s64 delta) 256d339b133SRichard Cochran { 257a79f4f88SMatthew Vick struct igb_adapter *igb = container_of(ptp, struct igb_adapter, 258a79f4f88SMatthew Vick ptp_caps); 259d339b133SRichard Cochran unsigned long flags; 260d339b133SRichard Cochran 261d339b133SRichard Cochran spin_lock_irqsave(&igb->tmreg_lock, flags); 2625ee698e3SRichard Cochran timecounter_adjtime(&igb->tc, delta); 263d339b133SRichard Cochran spin_unlock_irqrestore(&igb->tmreg_lock, flags); 264d339b133SRichard Cochran 265d339b133SRichard Cochran return 0; 266d339b133SRichard Cochran } 267d339b133SRichard Cochran 268e57b8bdbSMatthew Vick static int igb_ptp_adjtime_i210(struct ptp_clock_info *ptp, s64 delta) 269e57b8bdbSMatthew Vick { 270e57b8bdbSMatthew Vick struct igb_adapter *igb = container_of(ptp, struct igb_adapter, 271e57b8bdbSMatthew Vick ptp_caps); 272e57b8bdbSMatthew Vick unsigned long flags; 273d4c496feSRichard Cochran struct timespec64 now, then = ns_to_timespec64(delta); 274e57b8bdbSMatthew Vick 275e57b8bdbSMatthew Vick spin_lock_irqsave(&igb->tmreg_lock, flags); 276e57b8bdbSMatthew Vick 277e57b8bdbSMatthew Vick igb_ptp_read_i210(igb, &now); 278d4c496feSRichard Cochran now = timespec64_add(now, then); 279d4c496feSRichard Cochran igb_ptp_write_i210(igb, (const struct timespec64 *)&now); 280e57b8bdbSMatthew Vick 281e57b8bdbSMatthew Vick spin_unlock_irqrestore(&igb->tmreg_lock, flags); 282e57b8bdbSMatthew Vick 283e57b8bdbSMatthew Vick return 0; 284e57b8bdbSMatthew Vick } 285e57b8bdbSMatthew Vick 286e57b8bdbSMatthew Vick static int igb_ptp_gettime_82576(struct ptp_clock_info *ptp, 287d4c496feSRichard Cochran struct timespec64 *ts) 288d339b133SRichard Cochran { 289a79f4f88SMatthew Vick struct igb_adapter *igb = container_of(ptp, struct igb_adapter, 290a79f4f88SMatthew Vick ptp_caps); 291a79f4f88SMatthew Vick unsigned long flags; 292d339b133SRichard Cochran u64 ns; 293d339b133SRichard Cochran 294d339b133SRichard Cochran spin_lock_irqsave(&igb->tmreg_lock, flags); 295d339b133SRichard Cochran 296d339b133SRichard Cochran ns = timecounter_read(&igb->tc); 297d339b133SRichard Cochran 298d339b133SRichard Cochran spin_unlock_irqrestore(&igb->tmreg_lock, flags); 299d339b133SRichard Cochran 300350f66d5SRichard Cochran *ts = ns_to_timespec64(ns); 301d339b133SRichard Cochran 302d339b133SRichard Cochran return 0; 303d339b133SRichard Cochran } 304d339b133SRichard Cochran 305e57b8bdbSMatthew Vick static int igb_ptp_gettime_i210(struct ptp_clock_info *ptp, 306d4c496feSRichard Cochran struct timespec64 *ts) 307e57b8bdbSMatthew Vick { 308e57b8bdbSMatthew Vick struct igb_adapter *igb = container_of(ptp, struct igb_adapter, 309e57b8bdbSMatthew Vick ptp_caps); 310e57b8bdbSMatthew Vick unsigned long flags; 311e57b8bdbSMatthew Vick 312e57b8bdbSMatthew Vick spin_lock_irqsave(&igb->tmreg_lock, flags); 313e57b8bdbSMatthew Vick 314e57b8bdbSMatthew Vick igb_ptp_read_i210(igb, ts); 315e57b8bdbSMatthew Vick 316e57b8bdbSMatthew Vick spin_unlock_irqrestore(&igb->tmreg_lock, flags); 317e57b8bdbSMatthew Vick 318e57b8bdbSMatthew Vick return 0; 319e57b8bdbSMatthew Vick } 320e57b8bdbSMatthew Vick 321e57b8bdbSMatthew Vick static int igb_ptp_settime_82576(struct ptp_clock_info *ptp, 322d4c496feSRichard Cochran const struct timespec64 *ts) 323d339b133SRichard Cochran { 324a79f4f88SMatthew Vick struct igb_adapter *igb = container_of(ptp, struct igb_adapter, 325a79f4f88SMatthew Vick ptp_caps); 326d339b133SRichard Cochran unsigned long flags; 327a79f4f88SMatthew Vick u64 ns; 328d339b133SRichard Cochran 329350f66d5SRichard Cochran ns = timespec64_to_ns(ts); 330d339b133SRichard Cochran 331d339b133SRichard Cochran spin_lock_irqsave(&igb->tmreg_lock, flags); 332d339b133SRichard Cochran 333d339b133SRichard Cochran timecounter_init(&igb->tc, &igb->cc, ns); 334d339b133SRichard Cochran 335d339b133SRichard Cochran spin_unlock_irqrestore(&igb->tmreg_lock, flags); 336d339b133SRichard Cochran 337d339b133SRichard Cochran return 0; 338d339b133SRichard Cochran } 339d339b133SRichard Cochran 340e57b8bdbSMatthew Vick static int igb_ptp_settime_i210(struct ptp_clock_info *ptp, 341d4c496feSRichard Cochran const struct timespec64 *ts) 342e57b8bdbSMatthew Vick { 343e57b8bdbSMatthew Vick struct igb_adapter *igb = container_of(ptp, struct igb_adapter, 344e57b8bdbSMatthew Vick ptp_caps); 345e57b8bdbSMatthew Vick unsigned long flags; 346e57b8bdbSMatthew Vick 347e57b8bdbSMatthew Vick spin_lock_irqsave(&igb->tmreg_lock, flags); 348e57b8bdbSMatthew Vick 349e57b8bdbSMatthew Vick igb_ptp_write_i210(igb, ts); 350e57b8bdbSMatthew Vick 351e57b8bdbSMatthew Vick spin_unlock_irqrestore(&igb->tmreg_lock, flags); 352e57b8bdbSMatthew Vick 353e57b8bdbSMatthew Vick return 0; 354e57b8bdbSMatthew Vick } 355e57b8bdbSMatthew Vick 356720db4ffSRichard Cochran static void igb_pin_direction(int pin, int input, u32 *ctrl, u32 *ctrl_ext) 357720db4ffSRichard Cochran { 358720db4ffSRichard Cochran u32 *ptr = pin < 2 ? ctrl : ctrl_ext; 359b23c0cc5SAlexander Duyck static const u32 mask[IGB_N_SDP] = { 360720db4ffSRichard Cochran E1000_CTRL_SDP0_DIR, 361720db4ffSRichard Cochran E1000_CTRL_SDP1_DIR, 362720db4ffSRichard Cochran E1000_CTRL_EXT_SDP2_DIR, 363720db4ffSRichard Cochran E1000_CTRL_EXT_SDP3_DIR, 364720db4ffSRichard Cochran }; 365720db4ffSRichard Cochran 366720db4ffSRichard Cochran if (input) 367720db4ffSRichard Cochran *ptr &= ~mask[pin]; 368720db4ffSRichard Cochran else 369720db4ffSRichard Cochran *ptr |= mask[pin]; 370720db4ffSRichard Cochran } 371720db4ffSRichard Cochran 372720db4ffSRichard Cochran static void igb_pin_extts(struct igb_adapter *igb, int chan, int pin) 373720db4ffSRichard Cochran { 374b23c0cc5SAlexander Duyck static const u32 aux0_sel_sdp[IGB_N_SDP] = { 375720db4ffSRichard Cochran AUX0_SEL_SDP0, AUX0_SEL_SDP1, AUX0_SEL_SDP2, AUX0_SEL_SDP3, 376720db4ffSRichard Cochran }; 377b23c0cc5SAlexander Duyck static const u32 aux1_sel_sdp[IGB_N_SDP] = { 378720db4ffSRichard Cochran AUX1_SEL_SDP0, AUX1_SEL_SDP1, AUX1_SEL_SDP2, AUX1_SEL_SDP3, 379720db4ffSRichard Cochran }; 380b23c0cc5SAlexander Duyck static const u32 ts_sdp_en[IGB_N_SDP] = { 381720db4ffSRichard Cochran TS_SDP0_EN, TS_SDP1_EN, TS_SDP2_EN, TS_SDP3_EN, 382720db4ffSRichard Cochran }; 383b23c0cc5SAlexander Duyck struct e1000_hw *hw = &igb->hw; 384720db4ffSRichard Cochran u32 ctrl, ctrl_ext, tssdp = 0; 385720db4ffSRichard Cochran 386720db4ffSRichard Cochran ctrl = rd32(E1000_CTRL); 387720db4ffSRichard Cochran ctrl_ext = rd32(E1000_CTRL_EXT); 388720db4ffSRichard Cochran tssdp = rd32(E1000_TSSDP); 389720db4ffSRichard Cochran 390720db4ffSRichard Cochran igb_pin_direction(pin, 1, &ctrl, &ctrl_ext); 391720db4ffSRichard Cochran 392720db4ffSRichard Cochran /* Make sure this pin is not enabled as an output. */ 393720db4ffSRichard Cochran tssdp &= ~ts_sdp_en[pin]; 394720db4ffSRichard Cochran 395720db4ffSRichard Cochran if (chan == 1) { 396720db4ffSRichard Cochran tssdp &= ~AUX1_SEL_SDP3; 397720db4ffSRichard Cochran tssdp |= aux1_sel_sdp[pin] | AUX1_TS_SDP_EN; 398720db4ffSRichard Cochran } else { 399720db4ffSRichard Cochran tssdp &= ~AUX0_SEL_SDP3; 400720db4ffSRichard Cochran tssdp |= aux0_sel_sdp[pin] | AUX0_TS_SDP_EN; 401720db4ffSRichard Cochran } 402720db4ffSRichard Cochran 403720db4ffSRichard Cochran wr32(E1000_TSSDP, tssdp); 404720db4ffSRichard Cochran wr32(E1000_CTRL, ctrl); 405720db4ffSRichard Cochran wr32(E1000_CTRL_EXT, ctrl_ext); 406720db4ffSRichard Cochran } 407720db4ffSRichard Cochran 408720db4ffSRichard Cochran static void igb_pin_perout(struct igb_adapter *igb, int chan, int pin) 409720db4ffSRichard Cochran { 410b23c0cc5SAlexander Duyck static const u32 aux0_sel_sdp[IGB_N_SDP] = { 411720db4ffSRichard Cochran AUX0_SEL_SDP0, AUX0_SEL_SDP1, AUX0_SEL_SDP2, AUX0_SEL_SDP3, 412720db4ffSRichard Cochran }; 413b23c0cc5SAlexander Duyck static const u32 aux1_sel_sdp[IGB_N_SDP] = { 414720db4ffSRichard Cochran AUX1_SEL_SDP0, AUX1_SEL_SDP1, AUX1_SEL_SDP2, AUX1_SEL_SDP3, 415720db4ffSRichard Cochran }; 416b23c0cc5SAlexander Duyck static const u32 ts_sdp_en[IGB_N_SDP] = { 417720db4ffSRichard Cochran TS_SDP0_EN, TS_SDP1_EN, TS_SDP2_EN, TS_SDP3_EN, 418720db4ffSRichard Cochran }; 419b23c0cc5SAlexander Duyck static const u32 ts_sdp_sel_tt0[IGB_N_SDP] = { 420720db4ffSRichard Cochran TS_SDP0_SEL_TT0, TS_SDP1_SEL_TT0, 421720db4ffSRichard Cochran TS_SDP2_SEL_TT0, TS_SDP3_SEL_TT0, 422720db4ffSRichard Cochran }; 423b23c0cc5SAlexander Duyck static const u32 ts_sdp_sel_tt1[IGB_N_SDP] = { 424720db4ffSRichard Cochran TS_SDP0_SEL_TT1, TS_SDP1_SEL_TT1, 425720db4ffSRichard Cochran TS_SDP2_SEL_TT1, TS_SDP3_SEL_TT1, 426720db4ffSRichard Cochran }; 427b23c0cc5SAlexander Duyck static const u32 ts_sdp_sel_clr[IGB_N_SDP] = { 428720db4ffSRichard Cochran TS_SDP0_SEL_FC1, TS_SDP1_SEL_FC1, 429720db4ffSRichard Cochran TS_SDP2_SEL_FC1, TS_SDP3_SEL_FC1, 430720db4ffSRichard Cochran }; 431b23c0cc5SAlexander Duyck struct e1000_hw *hw = &igb->hw; 432720db4ffSRichard Cochran u32 ctrl, ctrl_ext, tssdp = 0; 433720db4ffSRichard Cochran 434720db4ffSRichard Cochran ctrl = rd32(E1000_CTRL); 435720db4ffSRichard Cochran ctrl_ext = rd32(E1000_CTRL_EXT); 436720db4ffSRichard Cochran tssdp = rd32(E1000_TSSDP); 437720db4ffSRichard Cochran 438720db4ffSRichard Cochran igb_pin_direction(pin, 0, &ctrl, &ctrl_ext); 439720db4ffSRichard Cochran 440720db4ffSRichard Cochran /* Make sure this pin is not enabled as an input. */ 441720db4ffSRichard Cochran if ((tssdp & AUX0_SEL_SDP3) == aux0_sel_sdp[pin]) 442720db4ffSRichard Cochran tssdp &= ~AUX0_TS_SDP_EN; 443720db4ffSRichard Cochran 444720db4ffSRichard Cochran if ((tssdp & AUX1_SEL_SDP3) == aux1_sel_sdp[pin]) 445720db4ffSRichard Cochran tssdp &= ~AUX1_TS_SDP_EN; 446720db4ffSRichard Cochran 447720db4ffSRichard Cochran tssdp &= ~ts_sdp_sel_clr[pin]; 448720db4ffSRichard Cochran if (chan == 1) 449720db4ffSRichard Cochran tssdp |= ts_sdp_sel_tt1[pin]; 450720db4ffSRichard Cochran else 451720db4ffSRichard Cochran tssdp |= ts_sdp_sel_tt0[pin]; 452720db4ffSRichard Cochran 453720db4ffSRichard Cochran tssdp |= ts_sdp_en[pin]; 454720db4ffSRichard Cochran 455720db4ffSRichard Cochran wr32(E1000_TSSDP, tssdp); 456720db4ffSRichard Cochran wr32(E1000_CTRL, ctrl); 457720db4ffSRichard Cochran wr32(E1000_CTRL_EXT, ctrl_ext); 458720db4ffSRichard Cochran } 459720db4ffSRichard Cochran 46000c65578SRichard Cochran static int igb_ptp_feature_enable_i210(struct ptp_clock_info *ptp, 46100c65578SRichard Cochran struct ptp_clock_request *rq, int on) 46200c65578SRichard Cochran { 46300c65578SRichard Cochran struct igb_adapter *igb = 46400c65578SRichard Cochran container_of(ptp, struct igb_adapter, ptp_caps); 46500c65578SRichard Cochran struct e1000_hw *hw = &igb->hw; 466720db4ffSRichard Cochran u32 tsauxc, tsim, tsauxc_mask, tsim_mask, trgttiml, trgttimh; 46700c65578SRichard Cochran unsigned long flags; 468720db4ffSRichard Cochran struct timespec ts; 469e357f0aaSAlexander Duyck int pin = -1; 470720db4ffSRichard Cochran s64 ns; 47100c65578SRichard Cochran 47200c65578SRichard Cochran switch (rq->type) { 473720db4ffSRichard Cochran case PTP_CLK_REQ_EXTTS: 474720db4ffSRichard Cochran if (on) { 475720db4ffSRichard Cochran pin = ptp_find_pin(igb->ptp_clock, PTP_PF_EXTTS, 476720db4ffSRichard Cochran rq->extts.index); 477720db4ffSRichard Cochran if (pin < 0) 478720db4ffSRichard Cochran return -EBUSY; 479720db4ffSRichard Cochran } 480720db4ffSRichard Cochran if (rq->extts.index == 1) { 481720db4ffSRichard Cochran tsauxc_mask = TSAUXC_EN_TS1; 482720db4ffSRichard Cochran tsim_mask = TSINTR_AUTT1; 483720db4ffSRichard Cochran } else { 484720db4ffSRichard Cochran tsauxc_mask = TSAUXC_EN_TS0; 485720db4ffSRichard Cochran tsim_mask = TSINTR_AUTT0; 486720db4ffSRichard Cochran } 487720db4ffSRichard Cochran spin_lock_irqsave(&igb->tmreg_lock, flags); 488720db4ffSRichard Cochran tsauxc = rd32(E1000_TSAUXC); 489720db4ffSRichard Cochran tsim = rd32(E1000_TSIM); 490720db4ffSRichard Cochran if (on) { 491720db4ffSRichard Cochran igb_pin_extts(igb, rq->extts.index, pin); 492720db4ffSRichard Cochran tsauxc |= tsauxc_mask; 493720db4ffSRichard Cochran tsim |= tsim_mask; 494720db4ffSRichard Cochran } else { 495720db4ffSRichard Cochran tsauxc &= ~tsauxc_mask; 496720db4ffSRichard Cochran tsim &= ~tsim_mask; 497720db4ffSRichard Cochran } 498720db4ffSRichard Cochran wr32(E1000_TSAUXC, tsauxc); 499720db4ffSRichard Cochran wr32(E1000_TSIM, tsim); 500720db4ffSRichard Cochran spin_unlock_irqrestore(&igb->tmreg_lock, flags); 501720db4ffSRichard Cochran return 0; 502720db4ffSRichard Cochran 503720db4ffSRichard Cochran case PTP_CLK_REQ_PEROUT: 504720db4ffSRichard Cochran if (on) { 505720db4ffSRichard Cochran pin = ptp_find_pin(igb->ptp_clock, PTP_PF_PEROUT, 506720db4ffSRichard Cochran rq->perout.index); 507720db4ffSRichard Cochran if (pin < 0) 508720db4ffSRichard Cochran return -EBUSY; 509720db4ffSRichard Cochran } 510720db4ffSRichard Cochran ts.tv_sec = rq->perout.period.sec; 511720db4ffSRichard Cochran ts.tv_nsec = rq->perout.period.nsec; 512720db4ffSRichard Cochran ns = timespec_to_ns(&ts); 513720db4ffSRichard Cochran ns = ns >> 1; 514720db4ffSRichard Cochran if (on && ns < 500000LL) { 515720db4ffSRichard Cochran /* 2k interrupts per second is an awful lot. */ 516720db4ffSRichard Cochran return -EINVAL; 517720db4ffSRichard Cochran } 518720db4ffSRichard Cochran ts = ns_to_timespec(ns); 519720db4ffSRichard Cochran if (rq->perout.index == 1) { 520720db4ffSRichard Cochran tsauxc_mask = TSAUXC_EN_TT1; 521720db4ffSRichard Cochran tsim_mask = TSINTR_TT1; 522720db4ffSRichard Cochran trgttiml = E1000_TRGTTIML1; 523720db4ffSRichard Cochran trgttimh = E1000_TRGTTIMH1; 524720db4ffSRichard Cochran } else { 525720db4ffSRichard Cochran tsauxc_mask = TSAUXC_EN_TT0; 526720db4ffSRichard Cochran tsim_mask = TSINTR_TT0; 527720db4ffSRichard Cochran trgttiml = E1000_TRGTTIML0; 528720db4ffSRichard Cochran trgttimh = E1000_TRGTTIMH0; 529720db4ffSRichard Cochran } 530720db4ffSRichard Cochran spin_lock_irqsave(&igb->tmreg_lock, flags); 531720db4ffSRichard Cochran tsauxc = rd32(E1000_TSAUXC); 532720db4ffSRichard Cochran tsim = rd32(E1000_TSIM); 533720db4ffSRichard Cochran if (on) { 534720db4ffSRichard Cochran int i = rq->perout.index; 535720db4ffSRichard Cochran 536720db4ffSRichard Cochran igb_pin_perout(igb, i, pin); 537720db4ffSRichard Cochran igb->perout[i].start.tv_sec = rq->perout.start.sec; 538720db4ffSRichard Cochran igb->perout[i].start.tv_nsec = rq->perout.start.nsec; 539720db4ffSRichard Cochran igb->perout[i].period.tv_sec = ts.tv_sec; 540720db4ffSRichard Cochran igb->perout[i].period.tv_nsec = ts.tv_nsec; 541720db4ffSRichard Cochran wr32(trgttiml, rq->perout.start.sec); 542720db4ffSRichard Cochran wr32(trgttimh, rq->perout.start.nsec); 543720db4ffSRichard Cochran tsauxc |= tsauxc_mask; 544720db4ffSRichard Cochran tsim |= tsim_mask; 545720db4ffSRichard Cochran } else { 546720db4ffSRichard Cochran tsauxc &= ~tsauxc_mask; 547720db4ffSRichard Cochran tsim &= ~tsim_mask; 548720db4ffSRichard Cochran } 549720db4ffSRichard Cochran wr32(E1000_TSAUXC, tsauxc); 550720db4ffSRichard Cochran wr32(E1000_TSIM, tsim); 551720db4ffSRichard Cochran spin_unlock_irqrestore(&igb->tmreg_lock, flags); 552720db4ffSRichard Cochran return 0; 553720db4ffSRichard Cochran 55400c65578SRichard Cochran case PTP_CLK_REQ_PPS: 55500c65578SRichard Cochran spin_lock_irqsave(&igb->tmreg_lock, flags); 55600c65578SRichard Cochran tsim = rd32(E1000_TSIM); 55700c65578SRichard Cochran if (on) 55800c65578SRichard Cochran tsim |= TSINTR_SYS_WRAP; 55900c65578SRichard Cochran else 56000c65578SRichard Cochran tsim &= ~TSINTR_SYS_WRAP; 56100c65578SRichard Cochran wr32(E1000_TSIM, tsim); 56200c65578SRichard Cochran spin_unlock_irqrestore(&igb->tmreg_lock, flags); 56300c65578SRichard Cochran return 0; 56400c65578SRichard Cochran } 56500c65578SRichard Cochran 56600c65578SRichard Cochran return -EOPNOTSUPP; 56700c65578SRichard Cochran } 56800c65578SRichard Cochran 569102be52fSJacob Keller static int igb_ptp_feature_enable(struct ptp_clock_info *ptp, 570d339b133SRichard Cochran struct ptp_clock_request *rq, int on) 571d339b133SRichard Cochran { 572d339b133SRichard Cochran return -EOPNOTSUPP; 573d339b133SRichard Cochran } 574d339b133SRichard Cochran 575720db4ffSRichard Cochran static int igb_ptp_verify_pin(struct ptp_clock_info *ptp, unsigned int pin, 576720db4ffSRichard Cochran enum ptp_pin_function func, unsigned int chan) 577720db4ffSRichard Cochran { 578720db4ffSRichard Cochran switch (func) { 579720db4ffSRichard Cochran case PTP_PF_NONE: 580720db4ffSRichard Cochran case PTP_PF_EXTTS: 581720db4ffSRichard Cochran case PTP_PF_PEROUT: 582720db4ffSRichard Cochran break; 583720db4ffSRichard Cochran case PTP_PF_PHYSYNC: 584720db4ffSRichard Cochran return -1; 585720db4ffSRichard Cochran } 586720db4ffSRichard Cochran return 0; 587720db4ffSRichard Cochran } 588720db4ffSRichard Cochran 5891f6e8178SMatthew Vick /** 5901f6e8178SMatthew Vick * igb_ptp_tx_work 5911f6e8178SMatthew Vick * @work: pointer to work struct 5921f6e8178SMatthew Vick * 5931f6e8178SMatthew Vick * This work function polls the TSYNCTXCTL valid bit to determine when a 5941f6e8178SMatthew Vick * timestamp has been taken for the current stored skb. 595b980ac18SJeff Kirsher **/ 596167f3f71SJeff Kirsher static void igb_ptp_tx_work(struct work_struct *work) 5971f6e8178SMatthew Vick { 5981f6e8178SMatthew Vick struct igb_adapter *adapter = container_of(work, struct igb_adapter, 5991f6e8178SMatthew Vick ptp_tx_work); 6001f6e8178SMatthew Vick struct e1000_hw *hw = &adapter->hw; 6011f6e8178SMatthew Vick u32 tsynctxctl; 6021f6e8178SMatthew Vick 6031f6e8178SMatthew Vick if (!adapter->ptp_tx_skb) 6041f6e8178SMatthew Vick return; 6051f6e8178SMatthew Vick 606428f1f71SMatthew Vick if (time_is_before_jiffies(adapter->ptp_tx_start + 607428f1f71SMatthew Vick IGB_PTP_TX_TIMEOUT)) { 608428f1f71SMatthew Vick dev_kfree_skb_any(adapter->ptp_tx_skb); 609428f1f71SMatthew Vick adapter->ptp_tx_skb = NULL; 610ed4420a3SJakub Kicinski clear_bit_unlock(__IGB_PTP_TX_IN_PROGRESS, &adapter->state); 611428f1f71SMatthew Vick adapter->tx_hwtstamp_timeouts++; 612c5ffe7e1SJakub Kicinski dev_warn(&adapter->pdev->dev, "clearing Tx timestamp hang\n"); 613428f1f71SMatthew Vick return; 614428f1f71SMatthew Vick } 615428f1f71SMatthew Vick 6161f6e8178SMatthew Vick tsynctxctl = rd32(E1000_TSYNCTXCTL); 6171f6e8178SMatthew Vick if (tsynctxctl & E1000_TSYNCTXCTL_VALID) 6181f6e8178SMatthew Vick igb_ptp_tx_hwtstamp(adapter); 6191f6e8178SMatthew Vick else 6201f6e8178SMatthew Vick /* reschedule to check later */ 6211f6e8178SMatthew Vick schedule_work(&adapter->ptp_tx_work); 6221f6e8178SMatthew Vick } 6231f6e8178SMatthew Vick 624a79f4f88SMatthew Vick static void igb_ptp_overflow_check(struct work_struct *work) 625d339b133SRichard Cochran { 626d339b133SRichard Cochran struct igb_adapter *igb = 627a79f4f88SMatthew Vick container_of(work, struct igb_adapter, ptp_overflow_work.work); 628d4c496feSRichard Cochran struct timespec64 ts; 629d339b133SRichard Cochran 630d4c496feSRichard Cochran igb->ptp_caps.gettime64(&igb->ptp_caps, &ts); 631d339b133SRichard Cochran 63232eaf120SDavid S. Miller pr_debug("igb overflow check at %lld.%09lu\n", 63332eaf120SDavid S. Miller (long long) ts.tv_sec, ts.tv_nsec); 634d339b133SRichard Cochran 635a79f4f88SMatthew Vick schedule_delayed_work(&igb->ptp_overflow_work, 636a79f4f88SMatthew Vick IGB_SYSTIM_OVERFLOW_PERIOD); 637a79f4f88SMatthew Vick } 638a79f4f88SMatthew Vick 639a79f4f88SMatthew Vick /** 640fc580751SMatthew Vick * igb_ptp_rx_hang - detect error case when Rx timestamp registers latched 641fc580751SMatthew Vick * @adapter: private network adapter structure 642fc580751SMatthew Vick * 643fc580751SMatthew Vick * This watchdog task is scheduled to detect error case where hardware has 644fc580751SMatthew Vick * dropped an Rx packet that was timestamped when the ring is full. The 645fc580751SMatthew Vick * particular error is rare but leaves the device in a state unable to timestamp 646fc580751SMatthew Vick * any future packets. 647b980ac18SJeff Kirsher **/ 648fc580751SMatthew Vick void igb_ptp_rx_hang(struct igb_adapter *adapter) 649fc580751SMatthew Vick { 650fc580751SMatthew Vick struct e1000_hw *hw = &adapter->hw; 651fc580751SMatthew Vick u32 tsyncrxctl = rd32(E1000_TSYNCRXCTL); 652fc580751SMatthew Vick unsigned long rx_event; 653fc580751SMatthew Vick 654fc580751SMatthew Vick if (hw->mac.type != e1000_82576) 655fc580751SMatthew Vick return; 656fc580751SMatthew Vick 657fc580751SMatthew Vick /* If we don't have a valid timestamp in the registers, just update the 658fc580751SMatthew Vick * timeout counter and exit 659fc580751SMatthew Vick */ 660fc580751SMatthew Vick if (!(tsyncrxctl & E1000_TSYNCRXCTL_VALID)) { 661fc580751SMatthew Vick adapter->last_rx_ptp_check = jiffies; 662fc580751SMatthew Vick return; 663fc580751SMatthew Vick } 664fc580751SMatthew Vick 665fc580751SMatthew Vick /* Determine the most recent watchdog or rx_timestamp event */ 666fc580751SMatthew Vick rx_event = adapter->last_rx_ptp_check; 6675499a968SJakub Kicinski if (time_after(adapter->last_rx_timestamp, rx_event)) 6685499a968SJakub Kicinski rx_event = adapter->last_rx_timestamp; 669fc580751SMatthew Vick 670fc580751SMatthew Vick /* Only need to read the high RXSTMP register to clear the lock */ 671fc580751SMatthew Vick if (time_is_before_jiffies(rx_event + 5 * HZ)) { 672fc580751SMatthew Vick rd32(E1000_RXSTMPH); 673fc580751SMatthew Vick adapter->last_rx_ptp_check = jiffies; 674fc580751SMatthew Vick adapter->rx_hwtstamp_cleared++; 675c5ffe7e1SJakub Kicinski dev_warn(&adapter->pdev->dev, "clearing Rx timestamp hang\n"); 676fc580751SMatthew Vick } 677fc580751SMatthew Vick } 678fc580751SMatthew Vick 679fc580751SMatthew Vick /** 680a79f4f88SMatthew Vick * igb_ptp_tx_hwtstamp - utility function which checks for TX time stamp 6811f6e8178SMatthew Vick * @adapter: Board private structure. 682a79f4f88SMatthew Vick * 683a79f4f88SMatthew Vick * If we were asked to do hardware stamping and such a time stamp is 684a79f4f88SMatthew Vick * available, then it must have been for this skb here because we only 685a79f4f88SMatthew Vick * allow only one such packet into the queue. 686b980ac18SJeff Kirsher **/ 687167f3f71SJeff Kirsher static void igb_ptp_tx_hwtstamp(struct igb_adapter *adapter) 688a79f4f88SMatthew Vick { 689a79f4f88SMatthew Vick struct e1000_hw *hw = &adapter->hw; 690a79f4f88SMatthew Vick struct skb_shared_hwtstamps shhwtstamps; 691a79f4f88SMatthew Vick u64 regval; 692a79f4f88SMatthew Vick 693a79f4f88SMatthew Vick regval = rd32(E1000_TXSTMPL); 694a79f4f88SMatthew Vick regval |= (u64)rd32(E1000_TXSTMPH) << 32; 695a79f4f88SMatthew Vick 696a79f4f88SMatthew Vick igb_ptp_systim_to_hwtstamp(adapter, &shhwtstamps, regval); 6971f6e8178SMatthew Vick skb_tstamp_tx(adapter->ptp_tx_skb, &shhwtstamps); 6981f6e8178SMatthew Vick dev_kfree_skb_any(adapter->ptp_tx_skb); 6991f6e8178SMatthew Vick adapter->ptp_tx_skb = NULL; 700ed4420a3SJakub Kicinski clear_bit_unlock(__IGB_PTP_TX_IN_PROGRESS, &adapter->state); 701a79f4f88SMatthew Vick } 702a79f4f88SMatthew Vick 703b534550aSAlexander Duyck /** 704b534550aSAlexander Duyck * igb_ptp_rx_pktstamp - retrieve Rx per packet timestamp 705b534550aSAlexander Duyck * @q_vector: Pointer to interrupt specific structure 706b534550aSAlexander Duyck * @va: Pointer to address containing Rx buffer 707b534550aSAlexander Duyck * @skb: Buffer containing timestamp and packet 708b534550aSAlexander Duyck * 709b534550aSAlexander Duyck * This function is meant to retrieve a timestamp from the first buffer of an 710b534550aSAlexander Duyck * incoming frame. The value is stored in little endian format starting on 711b534550aSAlexander Duyck * byte 8. 712b980ac18SJeff Kirsher **/ 713b534550aSAlexander Duyck void igb_ptp_rx_pktstamp(struct igb_q_vector *q_vector, 714b534550aSAlexander Duyck unsigned char *va, 715b534550aSAlexander Duyck struct sk_buff *skb) 716b534550aSAlexander Duyck { 717ac61d515SAlexander Duyck __le64 *regval = (__le64 *)va; 718b534550aSAlexander Duyck 719b980ac18SJeff Kirsher /* The timestamp is recorded in little endian format. 720b534550aSAlexander Duyck * DWORD: 0 1 2 3 721b534550aSAlexander Duyck * Field: Reserved Reserved SYSTIML SYSTIMH 722b534550aSAlexander Duyck */ 723b534550aSAlexander Duyck igb_ptp_systim_to_hwtstamp(q_vector->adapter, skb_hwtstamps(skb), 724b534550aSAlexander Duyck le64_to_cpu(regval[1])); 725b534550aSAlexander Duyck } 726b534550aSAlexander Duyck 727b534550aSAlexander Duyck /** 728b534550aSAlexander Duyck * igb_ptp_rx_rgtstamp - retrieve Rx timestamp stored in register 729b534550aSAlexander Duyck * @q_vector: Pointer to interrupt specific structure 730b534550aSAlexander Duyck * @skb: Buffer containing timestamp and packet 731b534550aSAlexander Duyck * 732b534550aSAlexander Duyck * This function is meant to retrieve a timestamp from the internal registers 733b534550aSAlexander Duyck * of the adapter and store it in the skb. 734b980ac18SJeff Kirsher **/ 735b534550aSAlexander Duyck void igb_ptp_rx_rgtstamp(struct igb_q_vector *q_vector, 736a79f4f88SMatthew Vick struct sk_buff *skb) 737a79f4f88SMatthew Vick { 738a79f4f88SMatthew Vick struct igb_adapter *adapter = q_vector->adapter; 739a79f4f88SMatthew Vick struct e1000_hw *hw = &adapter->hw; 740a79f4f88SMatthew Vick u64 regval; 741a79f4f88SMatthew Vick 742b980ac18SJeff Kirsher /* If this bit is set, then the RX registers contain the time stamp. No 743a79f4f88SMatthew Vick * other packet will be time stamped until we read these registers, so 744a79f4f88SMatthew Vick * read the registers to make them available again. Because only one 745a79f4f88SMatthew Vick * packet can be time stamped at a time, we know that the register 746a79f4f88SMatthew Vick * values must belong to this one here and therefore we don't need to 747a79f4f88SMatthew Vick * compare any of the additional attributes stored for it. 748a79f4f88SMatthew Vick * 749a79f4f88SMatthew Vick * If nothing went wrong, then it should have a shared tx_flags that we 750a79f4f88SMatthew Vick * can turn into a skb_shared_hwtstamps. 751a79f4f88SMatthew Vick */ 752a79f4f88SMatthew Vick if (!(rd32(E1000_TSYNCRXCTL) & E1000_TSYNCRXCTL_VALID)) 753a79f4f88SMatthew Vick return; 754a79f4f88SMatthew Vick 755a79f4f88SMatthew Vick regval = rd32(E1000_RXSTMPL); 756a79f4f88SMatthew Vick regval |= (u64)rd32(E1000_RXSTMPH) << 32; 757a79f4f88SMatthew Vick 758a79f4f88SMatthew Vick igb_ptp_systim_to_hwtstamp(adapter, skb_hwtstamps(skb), regval); 7595499a968SJakub Kicinski 7605499a968SJakub Kicinski /* Update the last_rx_timestamp timer in order to enable watchdog check 7615499a968SJakub Kicinski * for error case of latched timestamp on a dropped packet. 7625499a968SJakub Kicinski */ 7635499a968SJakub Kicinski adapter->last_rx_timestamp = jiffies; 764a79f4f88SMatthew Vick } 765a79f4f88SMatthew Vick 766a79f4f88SMatthew Vick /** 7676ab5f7b2SJacob Keller * igb_ptp_get_ts_config - get hardware time stamping config 768a79f4f88SMatthew Vick * @netdev: 769a79f4f88SMatthew Vick * @ifreq: 7706ab5f7b2SJacob Keller * 7716ab5f7b2SJacob Keller * Get the hwtstamp_config settings to return to the user. Rather than attempt 7726ab5f7b2SJacob Keller * to deconstruct the settings from the registers, just return a shadow copy 7736ab5f7b2SJacob Keller * of the last known settings. 7746ab5f7b2SJacob Keller **/ 7756ab5f7b2SJacob Keller int igb_ptp_get_ts_config(struct net_device *netdev, struct ifreq *ifr) 7766ab5f7b2SJacob Keller { 7776ab5f7b2SJacob Keller struct igb_adapter *adapter = netdev_priv(netdev); 7786ab5f7b2SJacob Keller struct hwtstamp_config *config = &adapter->tstamp_config; 7796ab5f7b2SJacob Keller 7806ab5f7b2SJacob Keller return copy_to_user(ifr->ifr_data, config, sizeof(*config)) ? 7816ab5f7b2SJacob Keller -EFAULT : 0; 7826ab5f7b2SJacob Keller } 7839f62ecf4SJacob Keller 7846ab5f7b2SJacob Keller /** 7859f62ecf4SJacob Keller * igb_ptp_set_timestamp_mode - setup hardware for timestamping 7869f62ecf4SJacob Keller * @adapter: networking device structure 7879f62ecf4SJacob Keller * @config: hwtstamp configuration 788a79f4f88SMatthew Vick * 789a79f4f88SMatthew Vick * Outgoing time stamping can be enabled and disabled. Play nice and 790a79f4f88SMatthew Vick * disable it when requested, although it shouldn't case any overhead 791a79f4f88SMatthew Vick * when no packet needs it. At most one packet in the queue may be 792a79f4f88SMatthew Vick * marked for time stamping, otherwise it would be impossible to tell 793a79f4f88SMatthew Vick * for sure to which packet the hardware time stamp belongs. 794a79f4f88SMatthew Vick * 795a79f4f88SMatthew Vick * Incoming time stamping has to be configured via the hardware 796a79f4f88SMatthew Vick * filters. Not all combinations are supported, in particular event 797a79f4f88SMatthew Vick * type has to be specified. Matching the kind of event packet is 798a79f4f88SMatthew Vick * not supported, with the exception of "all V2 events regardless of 799a79f4f88SMatthew Vick * level 2 or 4". 8009f62ecf4SJacob Keller */ 8019f62ecf4SJacob Keller static int igb_ptp_set_timestamp_mode(struct igb_adapter *adapter, 8029f62ecf4SJacob Keller struct hwtstamp_config *config) 803a79f4f88SMatthew Vick { 804a79f4f88SMatthew Vick struct e1000_hw *hw = &adapter->hw; 805a79f4f88SMatthew Vick u32 tsync_tx_ctl = E1000_TSYNCTXCTL_ENABLED; 806a79f4f88SMatthew Vick u32 tsync_rx_ctl = E1000_TSYNCRXCTL_ENABLED; 807a79f4f88SMatthew Vick u32 tsync_rx_cfg = 0; 808a79f4f88SMatthew Vick bool is_l4 = false; 809a79f4f88SMatthew Vick bool is_l2 = false; 810a79f4f88SMatthew Vick u32 regval; 811a79f4f88SMatthew Vick 812a79f4f88SMatthew Vick /* reserved for future extensions */ 8136ab5f7b2SJacob Keller if (config->flags) 814a79f4f88SMatthew Vick return -EINVAL; 815a79f4f88SMatthew Vick 8166ab5f7b2SJacob Keller switch (config->tx_type) { 817a79f4f88SMatthew Vick case HWTSTAMP_TX_OFF: 818a79f4f88SMatthew Vick tsync_tx_ctl = 0; 819a79f4f88SMatthew Vick case HWTSTAMP_TX_ON: 820a79f4f88SMatthew Vick break; 821a79f4f88SMatthew Vick default: 822a79f4f88SMatthew Vick return -ERANGE; 823a79f4f88SMatthew Vick } 824a79f4f88SMatthew Vick 8256ab5f7b2SJacob Keller switch (config->rx_filter) { 826a79f4f88SMatthew Vick case HWTSTAMP_FILTER_NONE: 827a79f4f88SMatthew Vick tsync_rx_ctl = 0; 828a79f4f88SMatthew Vick break; 829a79f4f88SMatthew Vick case HWTSTAMP_FILTER_PTP_V1_L4_SYNC: 830a79f4f88SMatthew Vick tsync_rx_ctl |= E1000_TSYNCRXCTL_TYPE_L4_V1; 831a79f4f88SMatthew Vick tsync_rx_cfg = E1000_TSYNCRXCFG_PTP_V1_SYNC_MESSAGE; 832a79f4f88SMatthew Vick is_l4 = true; 833a79f4f88SMatthew Vick break; 834a79f4f88SMatthew Vick case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ: 835a79f4f88SMatthew Vick tsync_rx_ctl |= E1000_TSYNCRXCTL_TYPE_L4_V1; 836a79f4f88SMatthew Vick tsync_rx_cfg = E1000_TSYNCRXCFG_PTP_V1_DELAY_REQ_MESSAGE; 837a79f4f88SMatthew Vick is_l4 = true; 838a79f4f88SMatthew Vick break; 8393e961a06SMatthew Vick case HWTSTAMP_FILTER_PTP_V2_EVENT: 8403e961a06SMatthew Vick case HWTSTAMP_FILTER_PTP_V2_L2_EVENT: 8413e961a06SMatthew Vick case HWTSTAMP_FILTER_PTP_V2_L4_EVENT: 8423e961a06SMatthew Vick case HWTSTAMP_FILTER_PTP_V2_SYNC: 843a79f4f88SMatthew Vick case HWTSTAMP_FILTER_PTP_V2_L2_SYNC: 844a79f4f88SMatthew Vick case HWTSTAMP_FILTER_PTP_V2_L4_SYNC: 8453e961a06SMatthew Vick case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ: 846a79f4f88SMatthew Vick case HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ: 847a79f4f88SMatthew Vick case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ: 848a79f4f88SMatthew Vick tsync_rx_ctl |= E1000_TSYNCRXCTL_TYPE_EVENT_V2; 8496ab5f7b2SJacob Keller config->rx_filter = HWTSTAMP_FILTER_PTP_V2_EVENT; 850a79f4f88SMatthew Vick is_l2 = true; 851a79f4f88SMatthew Vick is_l4 = true; 852a79f4f88SMatthew Vick break; 8533e961a06SMatthew Vick case HWTSTAMP_FILTER_PTP_V1_L4_EVENT: 8543e961a06SMatthew Vick case HWTSTAMP_FILTER_ALL: 8553e961a06SMatthew Vick /* 82576 cannot timestamp all packets, which it needs to do to 8563e961a06SMatthew Vick * support both V1 Sync and Delay_Req messages 8573e961a06SMatthew Vick */ 8583e961a06SMatthew Vick if (hw->mac.type != e1000_82576) { 8593e961a06SMatthew Vick tsync_rx_ctl |= E1000_TSYNCRXCTL_TYPE_ALL; 8606ab5f7b2SJacob Keller config->rx_filter = HWTSTAMP_FILTER_ALL; 8613e961a06SMatthew Vick break; 8623e961a06SMatthew Vick } 8633e961a06SMatthew Vick /* fall through */ 864a79f4f88SMatthew Vick default: 8656ab5f7b2SJacob Keller config->rx_filter = HWTSTAMP_FILTER_NONE; 866a79f4f88SMatthew Vick return -ERANGE; 867a79f4f88SMatthew Vick } 868a79f4f88SMatthew Vick 869a79f4f88SMatthew Vick if (hw->mac.type == e1000_82575) { 870a79f4f88SMatthew Vick if (tsync_rx_ctl | tsync_tx_ctl) 871a79f4f88SMatthew Vick return -EINVAL; 872a79f4f88SMatthew Vick return 0; 873a79f4f88SMatthew Vick } 874a79f4f88SMatthew Vick 875b980ac18SJeff Kirsher /* Per-packet timestamping only works if all packets are 876a79f4f88SMatthew Vick * timestamped, so enable timestamping in all packets as 877b980ac18SJeff Kirsher * long as one Rx filter was configured. 878a79f4f88SMatthew Vick */ 879a79f4f88SMatthew Vick if ((hw->mac.type >= e1000_82580) && tsync_rx_ctl) { 880a79f4f88SMatthew Vick tsync_rx_ctl = E1000_TSYNCRXCTL_ENABLED; 881a79f4f88SMatthew Vick tsync_rx_ctl |= E1000_TSYNCRXCTL_TYPE_ALL; 8826ab5f7b2SJacob Keller config->rx_filter = HWTSTAMP_FILTER_ALL; 8833e961a06SMatthew Vick is_l2 = true; 8843e961a06SMatthew Vick is_l4 = true; 885e57b8bdbSMatthew Vick 886e57b8bdbSMatthew Vick if ((hw->mac.type == e1000_i210) || 887e57b8bdbSMatthew Vick (hw->mac.type == e1000_i211)) { 888e57b8bdbSMatthew Vick regval = rd32(E1000_RXPBS); 889e57b8bdbSMatthew Vick regval |= E1000_RXPBS_CFG_TS_EN; 890e57b8bdbSMatthew Vick wr32(E1000_RXPBS, regval); 891e57b8bdbSMatthew Vick } 892a79f4f88SMatthew Vick } 893a79f4f88SMatthew Vick 894a79f4f88SMatthew Vick /* enable/disable TX */ 895a79f4f88SMatthew Vick regval = rd32(E1000_TSYNCTXCTL); 896a79f4f88SMatthew Vick regval &= ~E1000_TSYNCTXCTL_ENABLED; 897a79f4f88SMatthew Vick regval |= tsync_tx_ctl; 898a79f4f88SMatthew Vick wr32(E1000_TSYNCTXCTL, regval); 899a79f4f88SMatthew Vick 900a79f4f88SMatthew Vick /* enable/disable RX */ 901a79f4f88SMatthew Vick regval = rd32(E1000_TSYNCRXCTL); 902a79f4f88SMatthew Vick regval &= ~(E1000_TSYNCRXCTL_ENABLED | E1000_TSYNCRXCTL_TYPE_MASK); 903a79f4f88SMatthew Vick regval |= tsync_rx_ctl; 904a79f4f88SMatthew Vick wr32(E1000_TSYNCRXCTL, regval); 905a79f4f88SMatthew Vick 906a79f4f88SMatthew Vick /* define which PTP packets are time stamped */ 907a79f4f88SMatthew Vick wr32(E1000_TSYNCRXCFG, tsync_rx_cfg); 908a79f4f88SMatthew Vick 909a79f4f88SMatthew Vick /* define ethertype filter for timestamped packets */ 910a79f4f88SMatthew Vick if (is_l2) 911a79f4f88SMatthew Vick wr32(E1000_ETQF(3), 912a79f4f88SMatthew Vick (E1000_ETQF_FILTER_ENABLE | /* enable filter */ 913a79f4f88SMatthew Vick E1000_ETQF_1588 | /* enable timestamping */ 914a79f4f88SMatthew Vick ETH_P_1588)); /* 1588 eth protocol type */ 915a79f4f88SMatthew Vick else 916a79f4f88SMatthew Vick wr32(E1000_ETQF(3), 0); 917a79f4f88SMatthew Vick 918a79f4f88SMatthew Vick /* L4 Queue Filter[3]: filter by destination port and protocol */ 919a79f4f88SMatthew Vick if (is_l4) { 920a79f4f88SMatthew Vick u32 ftqf = (IPPROTO_UDP /* UDP */ 921a79f4f88SMatthew Vick | E1000_FTQF_VF_BP /* VF not compared */ 922a79f4f88SMatthew Vick | E1000_FTQF_1588_TIME_STAMP /* Enable Timestamping */ 923a79f4f88SMatthew Vick | E1000_FTQF_MASK); /* mask all inputs */ 924a79f4f88SMatthew Vick ftqf &= ~E1000_FTQF_MASK_PROTO_BP; /* enable protocol check */ 925a79f4f88SMatthew Vick 926ba59814bSMatthew Vick wr32(E1000_IMIR(3), htons(PTP_EV_PORT)); 927a79f4f88SMatthew Vick wr32(E1000_IMIREXT(3), 928a79f4f88SMatthew Vick (E1000_IMIREXT_SIZE_BP | E1000_IMIREXT_CTRL_BP)); 929a79f4f88SMatthew Vick if (hw->mac.type == e1000_82576) { 930a79f4f88SMatthew Vick /* enable source port check */ 931ba59814bSMatthew Vick wr32(E1000_SPQF(3), htons(PTP_EV_PORT)); 932a79f4f88SMatthew Vick ftqf &= ~E1000_FTQF_MASK_SOURCE_PORT_BP; 933a79f4f88SMatthew Vick } 934a79f4f88SMatthew Vick wr32(E1000_FTQF(3), ftqf); 935a79f4f88SMatthew Vick } else { 936a79f4f88SMatthew Vick wr32(E1000_FTQF(3), E1000_FTQF_MASK); 937a79f4f88SMatthew Vick } 938a79f4f88SMatthew Vick wrfl(); 939a79f4f88SMatthew Vick 940a79f4f88SMatthew Vick /* clear TX/RX time stamp registers, just to be sure */ 941e57b8bdbSMatthew Vick regval = rd32(E1000_TXSTMPL); 942a79f4f88SMatthew Vick regval = rd32(E1000_TXSTMPH); 943e57b8bdbSMatthew Vick regval = rd32(E1000_RXSTMPL); 944a79f4f88SMatthew Vick regval = rd32(E1000_RXSTMPH); 945a79f4f88SMatthew Vick 9469f62ecf4SJacob Keller return 0; 9479f62ecf4SJacob Keller } 9489f62ecf4SJacob Keller 9499f62ecf4SJacob Keller /** 9509f62ecf4SJacob Keller * igb_ptp_set_ts_config - set hardware time stamping config 9519f62ecf4SJacob Keller * @netdev: 9529f62ecf4SJacob Keller * @ifreq: 9539f62ecf4SJacob Keller * 9549f62ecf4SJacob Keller **/ 9559f62ecf4SJacob Keller int igb_ptp_set_ts_config(struct net_device *netdev, struct ifreq *ifr) 9569f62ecf4SJacob Keller { 9579f62ecf4SJacob Keller struct igb_adapter *adapter = netdev_priv(netdev); 9589f62ecf4SJacob Keller struct hwtstamp_config config; 9599f62ecf4SJacob Keller int err; 9609f62ecf4SJacob Keller 9619f62ecf4SJacob Keller if (copy_from_user(&config, ifr->ifr_data, sizeof(config))) 9629f62ecf4SJacob Keller return -EFAULT; 9639f62ecf4SJacob Keller 9649f62ecf4SJacob Keller err = igb_ptp_set_timestamp_mode(adapter, &config); 9659f62ecf4SJacob Keller if (err) 9669f62ecf4SJacob Keller return err; 9679f62ecf4SJacob Keller 9689f62ecf4SJacob Keller /* save these settings for future reference */ 9699f62ecf4SJacob Keller memcpy(&adapter->tstamp_config, &config, 9709f62ecf4SJacob Keller sizeof(adapter->tstamp_config)); 9719f62ecf4SJacob Keller 9729f62ecf4SJacob Keller return copy_to_user(ifr->ifr_data, &config, sizeof(config)) ? 973a79f4f88SMatthew Vick -EFAULT : 0; 974d339b133SRichard Cochran } 975d339b133SRichard Cochran 976d339b133SRichard Cochran void igb_ptp_init(struct igb_adapter *adapter) 977d339b133SRichard Cochran { 978d339b133SRichard Cochran struct e1000_hw *hw = &adapter->hw; 979201987e3SMatthew Vick struct net_device *netdev = adapter->netdev; 980720db4ffSRichard Cochran int i; 981d339b133SRichard Cochran 982d339b133SRichard Cochran switch (hw->mac.type) { 983d339b133SRichard Cochran case e1000_82576: 984201987e3SMatthew Vick snprintf(adapter->ptp_caps.name, 16, "%pm", netdev->dev_addr); 985a79f4f88SMatthew Vick adapter->ptp_caps.owner = THIS_MODULE; 98675517d92SJiri Benc adapter->ptp_caps.max_adj = 999999881; 987a79f4f88SMatthew Vick adapter->ptp_caps.n_ext_ts = 0; 988a79f4f88SMatthew Vick adapter->ptp_caps.pps = 0; 989a79f4f88SMatthew Vick adapter->ptp_caps.adjfreq = igb_ptp_adjfreq_82576; 990e57b8bdbSMatthew Vick adapter->ptp_caps.adjtime = igb_ptp_adjtime_82576; 991d4c496feSRichard Cochran adapter->ptp_caps.gettime64 = igb_ptp_gettime_82576; 992d4c496feSRichard Cochran adapter->ptp_caps.settime64 = igb_ptp_settime_82576; 993102be52fSJacob Keller adapter->ptp_caps.enable = igb_ptp_feature_enable; 994a79f4f88SMatthew Vick adapter->cc.read = igb_ptp_read_82576; 995b57c8940SRichard Cochran adapter->cc.mask = CYCLECOUNTER_MASK(64); 996d339b133SRichard Cochran adapter->cc.mult = 1; 997d339b133SRichard Cochran adapter->cc.shift = IGB_82576_TSYNC_SHIFT; 998d339b133SRichard Cochran /* Dial the nominal frequency. */ 999d339b133SRichard Cochran wr32(E1000_TIMINCA, INCPERIOD_82576 | INCVALUE_82576); 1000d339b133SRichard Cochran break; 1001e57b8bdbSMatthew Vick case e1000_82580: 1002ceb5f13bSCarolyn Wyborny case e1000_i354: 1003e57b8bdbSMatthew Vick case e1000_i350: 1004e57b8bdbSMatthew Vick snprintf(adapter->ptp_caps.name, 16, "%pm", netdev->dev_addr); 1005e57b8bdbSMatthew Vick adapter->ptp_caps.owner = THIS_MODULE; 1006e57b8bdbSMatthew Vick adapter->ptp_caps.max_adj = 62499999; 1007e57b8bdbSMatthew Vick adapter->ptp_caps.n_ext_ts = 0; 1008e57b8bdbSMatthew Vick adapter->ptp_caps.pps = 0; 1009e57b8bdbSMatthew Vick adapter->ptp_caps.adjfreq = igb_ptp_adjfreq_82580; 1010e57b8bdbSMatthew Vick adapter->ptp_caps.adjtime = igb_ptp_adjtime_82576; 1011d4c496feSRichard Cochran adapter->ptp_caps.gettime64 = igb_ptp_gettime_82576; 1012d4c496feSRichard Cochran adapter->ptp_caps.settime64 = igb_ptp_settime_82576; 1013102be52fSJacob Keller adapter->ptp_caps.enable = igb_ptp_feature_enable; 1014e57b8bdbSMatthew Vick adapter->cc.read = igb_ptp_read_82580; 1015b57c8940SRichard Cochran adapter->cc.mask = CYCLECOUNTER_MASK(IGB_NBITS_82580); 1016e57b8bdbSMatthew Vick adapter->cc.mult = 1; 1017e57b8bdbSMatthew Vick adapter->cc.shift = 0; 1018e57b8bdbSMatthew Vick /* Enable the timer functions by clearing bit 31. */ 1019e57b8bdbSMatthew Vick wr32(E1000_TSAUXC, 0x0); 1020e57b8bdbSMatthew Vick break; 1021e57b8bdbSMatthew Vick case e1000_i210: 1022e57b8bdbSMatthew Vick case e1000_i211: 1023720db4ffSRichard Cochran for (i = 0; i < IGB_N_SDP; i++) { 1024720db4ffSRichard Cochran struct ptp_pin_desc *ppd = &adapter->sdp_config[i]; 1025720db4ffSRichard Cochran 1026720db4ffSRichard Cochran snprintf(ppd->name, sizeof(ppd->name), "SDP%d", i); 1027720db4ffSRichard Cochran ppd->index = i; 1028720db4ffSRichard Cochran ppd->func = PTP_PF_NONE; 1029720db4ffSRichard Cochran } 1030e57b8bdbSMatthew Vick snprintf(adapter->ptp_caps.name, 16, "%pm", netdev->dev_addr); 1031e57b8bdbSMatthew Vick adapter->ptp_caps.owner = THIS_MODULE; 1032e57b8bdbSMatthew Vick adapter->ptp_caps.max_adj = 62499999; 1033720db4ffSRichard Cochran adapter->ptp_caps.n_ext_ts = IGB_N_EXTTS; 1034720db4ffSRichard Cochran adapter->ptp_caps.n_per_out = IGB_N_PEROUT; 1035720db4ffSRichard Cochran adapter->ptp_caps.n_pins = IGB_N_SDP; 103600c65578SRichard Cochran adapter->ptp_caps.pps = 1; 1037720db4ffSRichard Cochran adapter->ptp_caps.pin_config = adapter->sdp_config; 1038e57b8bdbSMatthew Vick adapter->ptp_caps.adjfreq = igb_ptp_adjfreq_82580; 1039e57b8bdbSMatthew Vick adapter->ptp_caps.adjtime = igb_ptp_adjtime_i210; 1040d4c496feSRichard Cochran adapter->ptp_caps.gettime64 = igb_ptp_gettime_i210; 1041d4c496feSRichard Cochran adapter->ptp_caps.settime64 = igb_ptp_settime_i210; 104200c65578SRichard Cochran adapter->ptp_caps.enable = igb_ptp_feature_enable_i210; 1043720db4ffSRichard Cochran adapter->ptp_caps.verify = igb_ptp_verify_pin; 1044e57b8bdbSMatthew Vick /* Enable the timer functions by clearing bit 31. */ 1045e57b8bdbSMatthew Vick wr32(E1000_TSAUXC, 0x0); 1046e57b8bdbSMatthew Vick break; 1047d339b133SRichard Cochran default: 1048d339b133SRichard Cochran adapter->ptp_clock = NULL; 1049d339b133SRichard Cochran return; 1050d339b133SRichard Cochran } 1051d339b133SRichard Cochran 1052d339b133SRichard Cochran wrfl(); 1053d339b133SRichard Cochran 1054e57b8bdbSMatthew Vick spin_lock_init(&adapter->tmreg_lock); 1055e57b8bdbSMatthew Vick INIT_WORK(&adapter->ptp_tx_work, igb_ptp_tx_work); 1056e57b8bdbSMatthew Vick 1057e57b8bdbSMatthew Vick /* Initialize the clock and overflow work for devices that need it. */ 1058e57b8bdbSMatthew Vick if ((hw->mac.type == e1000_i210) || (hw->mac.type == e1000_i211)) { 1059d4c496feSRichard Cochran struct timespec64 ts = ktime_to_timespec64(ktime_get_real()); 1060e57b8bdbSMatthew Vick 1061e57b8bdbSMatthew Vick igb_ptp_settime_i210(&adapter->ptp_caps, &ts); 1062e57b8bdbSMatthew Vick } else { 1063d339b133SRichard Cochran timecounter_init(&adapter->tc, &adapter->cc, 1064d339b133SRichard Cochran ktime_to_ns(ktime_get_real())); 1065d339b133SRichard Cochran 1066e57b8bdbSMatthew Vick INIT_DELAYED_WORK(&adapter->ptp_overflow_work, 1067e57b8bdbSMatthew Vick igb_ptp_overflow_check); 10681f6e8178SMatthew Vick 1069a79f4f88SMatthew Vick schedule_delayed_work(&adapter->ptp_overflow_work, 1070a79f4f88SMatthew Vick IGB_SYSTIM_OVERFLOW_PERIOD); 1071e57b8bdbSMatthew Vick } 1072d339b133SRichard Cochran 10731f6e8178SMatthew Vick /* Initialize the time sync interrupts for devices that support it. */ 10741f6e8178SMatthew Vick if (hw->mac.type >= e1000_82580) { 10750c375ac1SCarolyn Wyborny wr32(E1000_TSIM, TSYNC_INTERRUPTS); 10761f6e8178SMatthew Vick wr32(E1000_IMS, E1000_IMS_TS); 10771f6e8178SMatthew Vick } 10781f6e8178SMatthew Vick 10799f62ecf4SJacob Keller adapter->tstamp_config.rx_filter = HWTSTAMP_FILTER_NONE; 10809f62ecf4SJacob Keller adapter->tstamp_config.tx_type = HWTSTAMP_TX_OFF; 10819f62ecf4SJacob Keller 10821ef76158SRichard Cochran adapter->ptp_clock = ptp_clock_register(&adapter->ptp_caps, 10831ef76158SRichard Cochran &adapter->pdev->dev); 1084d339b133SRichard Cochran if (IS_ERR(adapter->ptp_clock)) { 1085d339b133SRichard Cochran adapter->ptp_clock = NULL; 1086d339b133SRichard Cochran dev_err(&adapter->pdev->dev, "ptp_clock_register failed\n"); 10871f6e8178SMatthew Vick } else { 1088d339b133SRichard Cochran dev_info(&adapter->pdev->dev, "added PHC on %s\n", 1089d339b133SRichard Cochran adapter->netdev->name); 10901f6e8178SMatthew Vick adapter->flags |= IGB_FLAG_PTP; 10911f6e8178SMatthew Vick } 1092d339b133SRichard Cochran } 1093d339b133SRichard Cochran 1094a79f4f88SMatthew Vick /** 1095a79f4f88SMatthew Vick * igb_ptp_stop - Disable PTP device and stop the overflow check. 1096a79f4f88SMatthew Vick * @adapter: Board private structure. 1097a79f4f88SMatthew Vick * 1098a79f4f88SMatthew Vick * This function stops the PTP support and cancels the delayed work. 1099a79f4f88SMatthew Vick **/ 1100a79f4f88SMatthew Vick void igb_ptp_stop(struct igb_adapter *adapter) 1101d339b133SRichard Cochran { 1102d3eef8c8SCarolyn Wyborny switch (adapter->hw.mac.type) { 1103d3eef8c8SCarolyn Wyborny case e1000_82576: 11041f6e8178SMatthew Vick case e1000_82580: 1105ceb5f13bSCarolyn Wyborny case e1000_i354: 11061f6e8178SMatthew Vick case e1000_i350: 1107a79f4f88SMatthew Vick cancel_delayed_work_sync(&adapter->ptp_overflow_work); 1108d3eef8c8SCarolyn Wyborny break; 11091f6e8178SMatthew Vick case e1000_i210: 11101f6e8178SMatthew Vick case e1000_i211: 11111f6e8178SMatthew Vick /* No delayed work to cancel. */ 11121f6e8178SMatthew Vick break; 1113d3eef8c8SCarolyn Wyborny default: 1114d3eef8c8SCarolyn Wyborny return; 1115d3eef8c8SCarolyn Wyborny } 1116d339b133SRichard Cochran 11171f6e8178SMatthew Vick cancel_work_sync(&adapter->ptp_tx_work); 1118badc26ddSMatthew Vick if (adapter->ptp_tx_skb) { 1119badc26ddSMatthew Vick dev_kfree_skb_any(adapter->ptp_tx_skb); 1120badc26ddSMatthew Vick adapter->ptp_tx_skb = NULL; 1121ed4420a3SJakub Kicinski clear_bit_unlock(__IGB_PTP_TX_IN_PROGRESS, &adapter->state); 1122badc26ddSMatthew Vick } 11231f6e8178SMatthew Vick 1124d339b133SRichard Cochran if (adapter->ptp_clock) { 1125d339b133SRichard Cochran ptp_clock_unregister(adapter->ptp_clock); 1126d339b133SRichard Cochran dev_info(&adapter->pdev->dev, "removed PHC on %s\n", 1127d339b133SRichard Cochran adapter->netdev->name); 11281f6e8178SMatthew Vick adapter->flags &= ~IGB_FLAG_PTP; 1129d339b133SRichard Cochran } 1130d339b133SRichard Cochran } 11311f6e8178SMatthew Vick 11321f6e8178SMatthew Vick /** 11331f6e8178SMatthew Vick * igb_ptp_reset - Re-enable the adapter for PTP following a reset. 11341f6e8178SMatthew Vick * @adapter: Board private structure. 11351f6e8178SMatthew Vick * 11361f6e8178SMatthew Vick * This function handles the reset work required to re-enable the PTP device. 11371f6e8178SMatthew Vick **/ 11381f6e8178SMatthew Vick void igb_ptp_reset(struct igb_adapter *adapter) 11391f6e8178SMatthew Vick { 11401f6e8178SMatthew Vick struct e1000_hw *hw = &adapter->hw; 11418298c1ecSRichard Cochran unsigned long flags; 11421f6e8178SMatthew Vick 11431f6e8178SMatthew Vick if (!(adapter->flags & IGB_FLAG_PTP)) 11441f6e8178SMatthew Vick return; 11451f6e8178SMatthew Vick 11466ab5f7b2SJacob Keller /* reset the tstamp_config */ 11479f62ecf4SJacob Keller igb_ptp_set_timestamp_mode(adapter, &adapter->tstamp_config); 11486ab5f7b2SJacob Keller 11498298c1ecSRichard Cochran spin_lock_irqsave(&adapter->tmreg_lock, flags); 11508298c1ecSRichard Cochran 11511f6e8178SMatthew Vick switch (adapter->hw.mac.type) { 11521f6e8178SMatthew Vick case e1000_82576: 11531f6e8178SMatthew Vick /* Dial the nominal frequency. */ 11541f6e8178SMatthew Vick wr32(E1000_TIMINCA, INCPERIOD_82576 | INCVALUE_82576); 11551f6e8178SMatthew Vick break; 11561f6e8178SMatthew Vick case e1000_82580: 1157ceb5f13bSCarolyn Wyborny case e1000_i354: 11581f6e8178SMatthew Vick case e1000_i350: 11591f6e8178SMatthew Vick case e1000_i210: 11601f6e8178SMatthew Vick case e1000_i211: 11611f6e8178SMatthew Vick wr32(E1000_TSAUXC, 0x0); 1162720db4ffSRichard Cochran wr32(E1000_TSSDP, 0x0); 11630c375ac1SCarolyn Wyborny wr32(E1000_TSIM, TSYNC_INTERRUPTS); 11641f6e8178SMatthew Vick wr32(E1000_IMS, E1000_IMS_TS); 11651f6e8178SMatthew Vick break; 11661f6e8178SMatthew Vick default: 11671f6e8178SMatthew Vick /* No work to do. */ 11688298c1ecSRichard Cochran goto out; 11691f6e8178SMatthew Vick } 11701f6e8178SMatthew Vick 1171e57b8bdbSMatthew Vick /* Re-initialize the timer. */ 1172e57b8bdbSMatthew Vick if ((hw->mac.type == e1000_i210) || (hw->mac.type == e1000_i211)) { 1173d4c496feSRichard Cochran struct timespec64 ts = ktime_to_timespec64(ktime_get_real()); 1174e57b8bdbSMatthew Vick 11758298c1ecSRichard Cochran igb_ptp_write_i210(adapter, &ts); 1176e57b8bdbSMatthew Vick } else { 11771f6e8178SMatthew Vick timecounter_init(&adapter->tc, &adapter->cc, 11781f6e8178SMatthew Vick ktime_to_ns(ktime_get_real())); 11791f6e8178SMatthew Vick } 11808298c1ecSRichard Cochran out: 11818298c1ecSRichard Cochran spin_unlock_irqrestore(&adapter->tmreg_lock, flags); 1182e57b8bdbSMatthew Vick } 1183