1d339b133SRichard Cochran /* 2d339b133SRichard Cochran * PTP Hardware Clock (PHC) driver for the Intel 82576 and 82580 3d339b133SRichard Cochran * 4d339b133SRichard Cochran * Copyright (C) 2011 Richard Cochran <richardcochran@gmail.com> 5d339b133SRichard Cochran * 6d339b133SRichard Cochran * This program is free software; you can redistribute it and/or modify 7d339b133SRichard Cochran * it under the terms of the GNU General Public License as published by 8d339b133SRichard Cochran * the Free Software Foundation; either version 2 of the License, or 9d339b133SRichard Cochran * (at your option) any later version. 10d339b133SRichard Cochran * 11d339b133SRichard Cochran * This program is distributed in the hope that it will be useful, 12d339b133SRichard Cochran * but WITHOUT ANY WARRANTY; without even the implied warranty of 13d339b133SRichard Cochran * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14d339b133SRichard Cochran * GNU General Public License for more details. 15d339b133SRichard Cochran * 16d339b133SRichard Cochran * You should have received a copy of the GNU General Public License along 17d339b133SRichard Cochran * with this program; if not, write to the Free Software Foundation, Inc., 18d339b133SRichard Cochran * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. 19d339b133SRichard Cochran */ 20d339b133SRichard Cochran #include <linux/module.h> 21d339b133SRichard Cochran #include <linux/device.h> 22d339b133SRichard Cochran #include <linux/pci.h> 23d339b133SRichard Cochran 24d339b133SRichard Cochran #include "igb.h" 25d339b133SRichard Cochran 26d339b133SRichard Cochran #define INCVALUE_MASK 0x7fffffff 27d339b133SRichard Cochran #define ISGN 0x80000000 28d339b133SRichard Cochran 29d339b133SRichard Cochran /* 307ebae817SRichard Cochran * The 82580 timesync updates the system timer every 8ns by 8ns, 317ebae817SRichard Cochran * and this update value cannot be reprogrammed. 327ebae817SRichard Cochran * 33d339b133SRichard Cochran * Neither the 82576 nor the 82580 offer registers wide enough to hold 34d339b133SRichard Cochran * nanoseconds time values for very long. For the 82580, SYSTIM always 35d339b133SRichard Cochran * counts nanoseconds, but the upper 24 bits are not availible. The 36d339b133SRichard Cochran * frequency is adjusted by changing the 32 bit fractional nanoseconds 37d339b133SRichard Cochran * register, TIMINCA. 38d339b133SRichard Cochran * 39d339b133SRichard Cochran * For the 82576, the SYSTIM register time unit is affect by the 40d339b133SRichard Cochran * choice of the 24 bit TININCA:IV (incvalue) field. Five bits of this 41d339b133SRichard Cochran * field are needed to provide the nominal 16 nanosecond period, 42d339b133SRichard Cochran * leaving 19 bits for fractional nanoseconds. 43d339b133SRichard Cochran * 447ebae817SRichard Cochran * We scale the NIC clock cycle by a large factor so that relatively 457ebae817SRichard Cochran * small clock corrections can be added or subtracted at each clock 467ebae817SRichard Cochran * tick. The drawbacks of a large factor are a) that the clock 477ebae817SRichard Cochran * register overflows more quickly (not such a big deal) and b) that 487ebae817SRichard Cochran * the increment per tick has to fit into 24 bits. As a result we 497ebae817SRichard Cochran * need to use a shift of 19 so we can fit a value of 16 into the 507ebae817SRichard Cochran * TIMINCA register. 517ebae817SRichard Cochran * 52d339b133SRichard Cochran * 53d339b133SRichard Cochran * SYSTIMH SYSTIML 54d339b133SRichard Cochran * +--------------+ +---+---+------+ 55d339b133SRichard Cochran * 82576 | 32 | | 8 | 5 | 19 | 56d339b133SRichard Cochran * +--------------+ +---+---+------+ 57d339b133SRichard Cochran * \________ 45 bits _______/ fract 58d339b133SRichard Cochran * 59d339b133SRichard Cochran * +----------+---+ +--------------+ 60d339b133SRichard Cochran * 82580 | 24 | 8 | | 32 | 61d339b133SRichard Cochran * +----------+---+ +--------------+ 62d339b133SRichard Cochran * reserved \______ 40 bits _____/ 63d339b133SRichard Cochran * 64d339b133SRichard Cochran * 65d339b133SRichard Cochran * The 45 bit 82576 SYSTIM overflows every 66d339b133SRichard Cochran * 2^45 * 10^-9 / 3600 = 9.77 hours. 67d339b133SRichard Cochran * 68d339b133SRichard Cochran * The 40 bit 82580 SYSTIM overflows every 69d339b133SRichard Cochran * 2^40 * 10^-9 / 60 = 18.3 minutes. 70d339b133SRichard Cochran */ 71d339b133SRichard Cochran 72a79f4f88SMatthew Vick #define IGB_SYSTIM_OVERFLOW_PERIOD (HZ * 60 * 9) 73d339b133SRichard Cochran #define INCPERIOD_82576 (1 << E1000_TIMINCA_16NS_SHIFT) 74d339b133SRichard Cochran #define INCVALUE_82576_MASK ((1 << E1000_TIMINCA_16NS_SHIFT) - 1) 75d339b133SRichard Cochran #define INCVALUE_82576 (16 << IGB_82576_TSYNC_SHIFT) 76d339b133SRichard Cochran #define IGB_NBITS_82580 40 77d339b133SRichard Cochran 78d339b133SRichard Cochran /* 79d339b133SRichard Cochran * SYSTIM read access for the 82576 80d339b133SRichard Cochran */ 81d339b133SRichard Cochran 82a79f4f88SMatthew Vick static cycle_t igb_ptp_read_82576(const struct cyclecounter *cc) 83d339b133SRichard Cochran { 84d339b133SRichard Cochran struct igb_adapter *igb = container_of(cc, struct igb_adapter, cc); 85d339b133SRichard Cochran struct e1000_hw *hw = &igb->hw; 86a79f4f88SMatthew Vick u64 val; 87a79f4f88SMatthew Vick u32 lo, hi; 88d339b133SRichard Cochran 89d339b133SRichard Cochran lo = rd32(E1000_SYSTIML); 90d339b133SRichard Cochran hi = rd32(E1000_SYSTIMH); 91d339b133SRichard Cochran 92d339b133SRichard Cochran val = ((u64) hi) << 32; 93d339b133SRichard Cochran val |= lo; 94d339b133SRichard Cochran 95d339b133SRichard Cochran return val; 96d339b133SRichard Cochran } 97d339b133SRichard Cochran 98d339b133SRichard Cochran /* 99d339b133SRichard Cochran * SYSTIM read access for the 82580 100d339b133SRichard Cochran */ 101d339b133SRichard Cochran 102a79f4f88SMatthew Vick static cycle_t igb_ptp_read_82580(const struct cyclecounter *cc) 103d339b133SRichard Cochran { 104d339b133SRichard Cochran struct igb_adapter *igb = container_of(cc, struct igb_adapter, cc); 105d339b133SRichard Cochran struct e1000_hw *hw = &igb->hw; 106a79f4f88SMatthew Vick u64 val; 107a79f4f88SMatthew Vick u32 lo, hi, jk; 108d339b133SRichard Cochran 1097ebae817SRichard Cochran /* 1107ebae817SRichard Cochran * The timestamp latches on lowest register read. For the 82580 1117ebae817SRichard Cochran * the lowest register is SYSTIMR instead of SYSTIML. However we only 1127ebae817SRichard Cochran * need to provide nanosecond resolution, so we just ignore it. 1137ebae817SRichard Cochran */ 114d339b133SRichard Cochran jk = rd32(E1000_SYSTIMR); 115d339b133SRichard Cochran lo = rd32(E1000_SYSTIML); 116d339b133SRichard Cochran hi = rd32(E1000_SYSTIMH); 117d339b133SRichard Cochran 118d339b133SRichard Cochran val = ((u64) hi) << 32; 119d339b133SRichard Cochran val |= lo; 120d339b133SRichard Cochran 121d339b133SRichard Cochran return val; 122d339b133SRichard Cochran } 123d339b133SRichard Cochran 124e57b8bdbSMatthew Vick /* 125e57b8bdbSMatthew Vick * SYSTIM read access for I210/I211 126e57b8bdbSMatthew Vick */ 127e57b8bdbSMatthew Vick 128e57b8bdbSMatthew Vick static void igb_ptp_read_i210(struct igb_adapter *adapter, struct timespec *ts) 129e57b8bdbSMatthew Vick { 130e57b8bdbSMatthew Vick struct e1000_hw *hw = &adapter->hw; 131e57b8bdbSMatthew Vick u32 sec, nsec, jk; 132e57b8bdbSMatthew Vick 133e57b8bdbSMatthew Vick /* 134e57b8bdbSMatthew Vick * The timestamp latches on lowest register read. For I210/I211, the 135e57b8bdbSMatthew Vick * lowest register is SYSTIMR. Since we only need to provide nanosecond 136e57b8bdbSMatthew Vick * resolution, we can ignore it. 137e57b8bdbSMatthew Vick */ 138e57b8bdbSMatthew Vick jk = rd32(E1000_SYSTIMR); 139e57b8bdbSMatthew Vick nsec = rd32(E1000_SYSTIML); 140e57b8bdbSMatthew Vick sec = rd32(E1000_SYSTIMH); 141e57b8bdbSMatthew Vick 142e57b8bdbSMatthew Vick ts->tv_sec = sec; 143e57b8bdbSMatthew Vick ts->tv_nsec = nsec; 144e57b8bdbSMatthew Vick } 145e57b8bdbSMatthew Vick 146e57b8bdbSMatthew Vick static void igb_ptp_write_i210(struct igb_adapter *adapter, 147e57b8bdbSMatthew Vick const struct timespec *ts) 148e57b8bdbSMatthew Vick { 149e57b8bdbSMatthew Vick struct e1000_hw *hw = &adapter->hw; 150e57b8bdbSMatthew Vick 151e57b8bdbSMatthew Vick /* 152e57b8bdbSMatthew Vick * Writing the SYSTIMR register is not necessary as it only provides 153e57b8bdbSMatthew Vick * sub-nanosecond resolution. 154e57b8bdbSMatthew Vick */ 155e57b8bdbSMatthew Vick wr32(E1000_SYSTIML, ts->tv_nsec); 156e57b8bdbSMatthew Vick wr32(E1000_SYSTIMH, ts->tv_sec); 157e57b8bdbSMatthew Vick } 158e57b8bdbSMatthew Vick 159a79f4f88SMatthew Vick /** 160a79f4f88SMatthew Vick * igb_ptp_systim_to_hwtstamp - convert system time value to hw timestamp 161a79f4f88SMatthew Vick * @adapter: board private structure 162a79f4f88SMatthew Vick * @hwtstamps: timestamp structure to update 163a79f4f88SMatthew Vick * @systim: unsigned 64bit system time value. 164a79f4f88SMatthew Vick * 165a79f4f88SMatthew Vick * We need to convert the system time value stored in the RX/TXSTMP registers 166a79f4f88SMatthew Vick * into a hwtstamp which can be used by the upper level timestamping functions. 167a79f4f88SMatthew Vick * 168a79f4f88SMatthew Vick * The 'tmreg_lock' spinlock is used to protect the consistency of the 169a79f4f88SMatthew Vick * system time value. This is needed because reading the 64 bit time 170a79f4f88SMatthew Vick * value involves reading two (or three) 32 bit registers. The first 171a79f4f88SMatthew Vick * read latches the value. Ditto for writing. 172a79f4f88SMatthew Vick * 173a79f4f88SMatthew Vick * In addition, here have extended the system time with an overflow 174a79f4f88SMatthew Vick * counter in software. 175a79f4f88SMatthew Vick **/ 176a79f4f88SMatthew Vick static void igb_ptp_systim_to_hwtstamp(struct igb_adapter *adapter, 177a79f4f88SMatthew Vick struct skb_shared_hwtstamps *hwtstamps, 178a79f4f88SMatthew Vick u64 systim) 179a79f4f88SMatthew Vick { 180a79f4f88SMatthew Vick unsigned long flags; 181a79f4f88SMatthew Vick u64 ns; 182a79f4f88SMatthew Vick 183a79f4f88SMatthew Vick switch (adapter->hw.mac.type) { 184a79f4f88SMatthew Vick case e1000_82576: 185e57b8bdbSMatthew Vick case e1000_82580: 186e57b8bdbSMatthew Vick case e1000_i350: 187a79f4f88SMatthew Vick spin_lock_irqsave(&adapter->tmreg_lock, flags); 188a79f4f88SMatthew Vick 189a79f4f88SMatthew Vick ns = timecounter_cyc2time(&adapter->tc, systim); 190a79f4f88SMatthew Vick 191a79f4f88SMatthew Vick spin_unlock_irqrestore(&adapter->tmreg_lock, flags); 192a79f4f88SMatthew Vick 193a79f4f88SMatthew Vick memset(hwtstamps, 0, sizeof(*hwtstamps)); 194a79f4f88SMatthew Vick hwtstamps->hwtstamp = ns_to_ktime(ns); 195e57b8bdbSMatthew Vick break; 196e57b8bdbSMatthew Vick case e1000_i210: 197e57b8bdbSMatthew Vick case e1000_i211: 198e57b8bdbSMatthew Vick memset(hwtstamps, 0, sizeof(*hwtstamps)); 199e57b8bdbSMatthew Vick /* Upper 32 bits contain s, lower 32 bits contain ns. */ 200e57b8bdbSMatthew Vick hwtstamps->hwtstamp = ktime_set(systim >> 32, 201e57b8bdbSMatthew Vick systim & 0xFFFFFFFF); 202e57b8bdbSMatthew Vick break; 203e57b8bdbSMatthew Vick default: 204e57b8bdbSMatthew Vick break; 205e57b8bdbSMatthew Vick } 206a79f4f88SMatthew Vick } 207a79f4f88SMatthew Vick 208d339b133SRichard Cochran /* 209d339b133SRichard Cochran * PTP clock operations 210d339b133SRichard Cochran */ 211d339b133SRichard Cochran 212a79f4f88SMatthew Vick static int igb_ptp_adjfreq_82576(struct ptp_clock_info *ptp, s32 ppb) 213d339b133SRichard Cochran { 214a79f4f88SMatthew Vick struct igb_adapter *igb = container_of(ptp, struct igb_adapter, 215a79f4f88SMatthew Vick ptp_caps); 216a79f4f88SMatthew Vick struct e1000_hw *hw = &igb->hw; 217a79f4f88SMatthew Vick int neg_adj = 0; 218d339b133SRichard Cochran u64 rate; 219d339b133SRichard Cochran u32 incvalue; 220d339b133SRichard Cochran 221d339b133SRichard Cochran if (ppb < 0) { 222d339b133SRichard Cochran neg_adj = 1; 223d339b133SRichard Cochran ppb = -ppb; 224d339b133SRichard Cochran } 225d339b133SRichard Cochran rate = ppb; 226d339b133SRichard Cochran rate <<= 14; 227d339b133SRichard Cochran rate = div_u64(rate, 1953125); 228d339b133SRichard Cochran 229d339b133SRichard Cochran incvalue = 16 << IGB_82576_TSYNC_SHIFT; 230d339b133SRichard Cochran 231d339b133SRichard Cochran if (neg_adj) 232d339b133SRichard Cochran incvalue -= rate; 233d339b133SRichard Cochran else 234d339b133SRichard Cochran incvalue += rate; 235d339b133SRichard Cochran 236d339b133SRichard Cochran wr32(E1000_TIMINCA, INCPERIOD_82576 | (incvalue & INCVALUE_82576_MASK)); 237d339b133SRichard Cochran 238d339b133SRichard Cochran return 0; 239d339b133SRichard Cochran } 240d339b133SRichard Cochran 241a79f4f88SMatthew Vick static int igb_ptp_adjfreq_82580(struct ptp_clock_info *ptp, s32 ppb) 242d339b133SRichard Cochran { 243a79f4f88SMatthew Vick struct igb_adapter *igb = container_of(ptp, struct igb_adapter, 244a79f4f88SMatthew Vick ptp_caps); 245a79f4f88SMatthew Vick struct e1000_hw *hw = &igb->hw; 246a79f4f88SMatthew Vick int neg_adj = 0; 247d339b133SRichard Cochran u64 rate; 248d339b133SRichard Cochran u32 inca; 249d339b133SRichard Cochran 250d339b133SRichard Cochran if (ppb < 0) { 251d339b133SRichard Cochran neg_adj = 1; 252d339b133SRichard Cochran ppb = -ppb; 253d339b133SRichard Cochran } 254d339b133SRichard Cochran rate = ppb; 255d339b133SRichard Cochran rate <<= 26; 256d339b133SRichard Cochran rate = div_u64(rate, 1953125); 257d339b133SRichard Cochran 258d339b133SRichard Cochran inca = rate & INCVALUE_MASK; 259d339b133SRichard Cochran if (neg_adj) 260d339b133SRichard Cochran inca |= ISGN; 261d339b133SRichard Cochran 262d339b133SRichard Cochran wr32(E1000_TIMINCA, inca); 263d339b133SRichard Cochran 264d339b133SRichard Cochran return 0; 265d339b133SRichard Cochran } 266d339b133SRichard Cochran 267e57b8bdbSMatthew Vick static int igb_ptp_adjtime_82576(struct ptp_clock_info *ptp, s64 delta) 268d339b133SRichard Cochran { 269a79f4f88SMatthew Vick struct igb_adapter *igb = container_of(ptp, struct igb_adapter, 270a79f4f88SMatthew Vick ptp_caps); 271d339b133SRichard Cochran unsigned long flags; 272a79f4f88SMatthew Vick s64 now; 273d339b133SRichard Cochran 274d339b133SRichard Cochran spin_lock_irqsave(&igb->tmreg_lock, flags); 275d339b133SRichard Cochran 276d339b133SRichard Cochran now = timecounter_read(&igb->tc); 277d339b133SRichard Cochran now += delta; 278d339b133SRichard Cochran timecounter_init(&igb->tc, &igb->cc, now); 279d339b133SRichard Cochran 280d339b133SRichard Cochran spin_unlock_irqrestore(&igb->tmreg_lock, flags); 281d339b133SRichard Cochran 282d339b133SRichard Cochran return 0; 283d339b133SRichard Cochran } 284d339b133SRichard Cochran 285e57b8bdbSMatthew Vick static int igb_ptp_adjtime_i210(struct ptp_clock_info *ptp, s64 delta) 286e57b8bdbSMatthew Vick { 287e57b8bdbSMatthew Vick struct igb_adapter *igb = container_of(ptp, struct igb_adapter, 288e57b8bdbSMatthew Vick ptp_caps); 289e57b8bdbSMatthew Vick unsigned long flags; 290e57b8bdbSMatthew Vick struct timespec now, then = ns_to_timespec(delta); 291e57b8bdbSMatthew Vick 292e57b8bdbSMatthew Vick spin_lock_irqsave(&igb->tmreg_lock, flags); 293e57b8bdbSMatthew Vick 294e57b8bdbSMatthew Vick igb_ptp_read_i210(igb, &now); 295e57b8bdbSMatthew Vick now = timespec_add(now, then); 296e57b8bdbSMatthew Vick igb_ptp_write_i210(igb, (const struct timespec *)&now); 297e57b8bdbSMatthew Vick 298e57b8bdbSMatthew Vick spin_unlock_irqrestore(&igb->tmreg_lock, flags); 299e57b8bdbSMatthew Vick 300e57b8bdbSMatthew Vick return 0; 301e57b8bdbSMatthew Vick } 302e57b8bdbSMatthew Vick 303e57b8bdbSMatthew Vick static int igb_ptp_gettime_82576(struct ptp_clock_info *ptp, 304e57b8bdbSMatthew Vick struct timespec *ts) 305d339b133SRichard Cochran { 306a79f4f88SMatthew Vick struct igb_adapter *igb = container_of(ptp, struct igb_adapter, 307a79f4f88SMatthew Vick ptp_caps); 308a79f4f88SMatthew Vick unsigned long flags; 309d339b133SRichard Cochran u64 ns; 310d339b133SRichard Cochran u32 remainder; 311d339b133SRichard Cochran 312d339b133SRichard Cochran spin_lock_irqsave(&igb->tmreg_lock, flags); 313d339b133SRichard Cochran 314d339b133SRichard Cochran ns = timecounter_read(&igb->tc); 315d339b133SRichard Cochran 316d339b133SRichard Cochran spin_unlock_irqrestore(&igb->tmreg_lock, flags); 317d339b133SRichard Cochran 318d339b133SRichard Cochran ts->tv_sec = div_u64_rem(ns, 1000000000, &remainder); 319d339b133SRichard Cochran ts->tv_nsec = remainder; 320d339b133SRichard Cochran 321d339b133SRichard Cochran return 0; 322d339b133SRichard Cochran } 323d339b133SRichard Cochran 324e57b8bdbSMatthew Vick static int igb_ptp_gettime_i210(struct ptp_clock_info *ptp, 325e57b8bdbSMatthew Vick struct timespec *ts) 326e57b8bdbSMatthew Vick { 327e57b8bdbSMatthew Vick struct igb_adapter *igb = container_of(ptp, struct igb_adapter, 328e57b8bdbSMatthew Vick ptp_caps); 329e57b8bdbSMatthew Vick unsigned long flags; 330e57b8bdbSMatthew Vick 331e57b8bdbSMatthew Vick spin_lock_irqsave(&igb->tmreg_lock, flags); 332e57b8bdbSMatthew Vick 333e57b8bdbSMatthew Vick igb_ptp_read_i210(igb, ts); 334e57b8bdbSMatthew Vick 335e57b8bdbSMatthew Vick spin_unlock_irqrestore(&igb->tmreg_lock, flags); 336e57b8bdbSMatthew Vick 337e57b8bdbSMatthew Vick return 0; 338e57b8bdbSMatthew Vick } 339e57b8bdbSMatthew Vick 340e57b8bdbSMatthew Vick static int igb_ptp_settime_82576(struct ptp_clock_info *ptp, 341a79f4f88SMatthew Vick const struct timespec *ts) 342d339b133SRichard Cochran { 343a79f4f88SMatthew Vick struct igb_adapter *igb = container_of(ptp, struct igb_adapter, 344a79f4f88SMatthew Vick ptp_caps); 345d339b133SRichard Cochran unsigned long flags; 346a79f4f88SMatthew Vick u64 ns; 347d339b133SRichard Cochran 348d339b133SRichard Cochran ns = ts->tv_sec * 1000000000ULL; 349d339b133SRichard Cochran ns += ts->tv_nsec; 350d339b133SRichard Cochran 351d339b133SRichard Cochran spin_lock_irqsave(&igb->tmreg_lock, flags); 352d339b133SRichard Cochran 353d339b133SRichard Cochran timecounter_init(&igb->tc, &igb->cc, ns); 354d339b133SRichard Cochran 355d339b133SRichard Cochran spin_unlock_irqrestore(&igb->tmreg_lock, flags); 356d339b133SRichard Cochran 357d339b133SRichard Cochran return 0; 358d339b133SRichard Cochran } 359d339b133SRichard Cochran 360e57b8bdbSMatthew Vick static int igb_ptp_settime_i210(struct ptp_clock_info *ptp, 361e57b8bdbSMatthew Vick const struct timespec *ts) 362e57b8bdbSMatthew Vick { 363e57b8bdbSMatthew Vick struct igb_adapter *igb = container_of(ptp, struct igb_adapter, 364e57b8bdbSMatthew Vick ptp_caps); 365e57b8bdbSMatthew Vick unsigned long flags; 366e57b8bdbSMatthew Vick 367e57b8bdbSMatthew Vick spin_lock_irqsave(&igb->tmreg_lock, flags); 368e57b8bdbSMatthew Vick 369e57b8bdbSMatthew Vick igb_ptp_write_i210(igb, ts); 370e57b8bdbSMatthew Vick 371e57b8bdbSMatthew Vick spin_unlock_irqrestore(&igb->tmreg_lock, flags); 372e57b8bdbSMatthew Vick 373e57b8bdbSMatthew Vick return 0; 374e57b8bdbSMatthew Vick } 375e57b8bdbSMatthew Vick 376a79f4f88SMatthew Vick static int igb_ptp_enable(struct ptp_clock_info *ptp, 377d339b133SRichard Cochran struct ptp_clock_request *rq, int on) 378d339b133SRichard Cochran { 379d339b133SRichard Cochran return -EOPNOTSUPP; 380d339b133SRichard Cochran } 381d339b133SRichard Cochran 3821f6e8178SMatthew Vick /** 3831f6e8178SMatthew Vick * igb_ptp_tx_work 3841f6e8178SMatthew Vick * @work: pointer to work struct 3851f6e8178SMatthew Vick * 3861f6e8178SMatthew Vick * This work function polls the TSYNCTXCTL valid bit to determine when a 3871f6e8178SMatthew Vick * timestamp has been taken for the current stored skb. 3881f6e8178SMatthew Vick */ 3891f6e8178SMatthew Vick void igb_ptp_tx_work(struct work_struct *work) 3901f6e8178SMatthew Vick { 3911f6e8178SMatthew Vick struct igb_adapter *adapter = container_of(work, struct igb_adapter, 3921f6e8178SMatthew Vick ptp_tx_work); 3931f6e8178SMatthew Vick struct e1000_hw *hw = &adapter->hw; 3941f6e8178SMatthew Vick u32 tsynctxctl; 3951f6e8178SMatthew Vick 3961f6e8178SMatthew Vick if (!adapter->ptp_tx_skb) 3971f6e8178SMatthew Vick return; 3981f6e8178SMatthew Vick 3991f6e8178SMatthew Vick tsynctxctl = rd32(E1000_TSYNCTXCTL); 4001f6e8178SMatthew Vick if (tsynctxctl & E1000_TSYNCTXCTL_VALID) 4011f6e8178SMatthew Vick igb_ptp_tx_hwtstamp(adapter); 4021f6e8178SMatthew Vick else 4031f6e8178SMatthew Vick /* reschedule to check later */ 4041f6e8178SMatthew Vick schedule_work(&adapter->ptp_tx_work); 4051f6e8178SMatthew Vick } 4061f6e8178SMatthew Vick 407a79f4f88SMatthew Vick static void igb_ptp_overflow_check(struct work_struct *work) 408d339b133SRichard Cochran { 409d339b133SRichard Cochran struct igb_adapter *igb = 410a79f4f88SMatthew Vick container_of(work, struct igb_adapter, ptp_overflow_work.work); 411a79f4f88SMatthew Vick struct timespec ts; 412d339b133SRichard Cochran 413e57b8bdbSMatthew Vick igb->ptp_caps.gettime(&igb->ptp_caps, &ts); 414d339b133SRichard Cochran 415d339b133SRichard Cochran pr_debug("igb overflow check at %ld.%09lu\n", ts.tv_sec, ts.tv_nsec); 416d339b133SRichard Cochran 417a79f4f88SMatthew Vick schedule_delayed_work(&igb->ptp_overflow_work, 418a79f4f88SMatthew Vick IGB_SYSTIM_OVERFLOW_PERIOD); 419a79f4f88SMatthew Vick } 420a79f4f88SMatthew Vick 421a79f4f88SMatthew Vick /** 422a79f4f88SMatthew Vick * igb_ptp_tx_hwtstamp - utility function which checks for TX time stamp 4231f6e8178SMatthew Vick * @adapter: Board private structure. 424a79f4f88SMatthew Vick * 425a79f4f88SMatthew Vick * If we were asked to do hardware stamping and such a time stamp is 426a79f4f88SMatthew Vick * available, then it must have been for this skb here because we only 427a79f4f88SMatthew Vick * allow only one such packet into the queue. 428a79f4f88SMatthew Vick */ 4291f6e8178SMatthew Vick void igb_ptp_tx_hwtstamp(struct igb_adapter *adapter) 430a79f4f88SMatthew Vick { 431a79f4f88SMatthew Vick struct e1000_hw *hw = &adapter->hw; 432a79f4f88SMatthew Vick struct skb_shared_hwtstamps shhwtstamps; 433a79f4f88SMatthew Vick u64 regval; 434a79f4f88SMatthew Vick 435a79f4f88SMatthew Vick regval = rd32(E1000_TXSTMPL); 436a79f4f88SMatthew Vick regval |= (u64)rd32(E1000_TXSTMPH) << 32; 437a79f4f88SMatthew Vick 438a79f4f88SMatthew Vick igb_ptp_systim_to_hwtstamp(adapter, &shhwtstamps, regval); 4391f6e8178SMatthew Vick skb_tstamp_tx(adapter->ptp_tx_skb, &shhwtstamps); 4401f6e8178SMatthew Vick dev_kfree_skb_any(adapter->ptp_tx_skb); 4411f6e8178SMatthew Vick adapter->ptp_tx_skb = NULL; 442a79f4f88SMatthew Vick } 443a79f4f88SMatthew Vick 444b534550aSAlexander Duyck /** 445b534550aSAlexander Duyck * igb_ptp_rx_pktstamp - retrieve Rx per packet timestamp 446b534550aSAlexander Duyck * @q_vector: Pointer to interrupt specific structure 447b534550aSAlexander Duyck * @va: Pointer to address containing Rx buffer 448b534550aSAlexander Duyck * @skb: Buffer containing timestamp and packet 449b534550aSAlexander Duyck * 450b534550aSAlexander Duyck * This function is meant to retrieve a timestamp from the first buffer of an 451b534550aSAlexander Duyck * incoming frame. The value is stored in little endian format starting on 452b534550aSAlexander Duyck * byte 8. 453b534550aSAlexander Duyck */ 454b534550aSAlexander Duyck void igb_ptp_rx_pktstamp(struct igb_q_vector *q_vector, 455b534550aSAlexander Duyck unsigned char *va, 456b534550aSAlexander Duyck struct sk_buff *skb) 457b534550aSAlexander Duyck { 458ac61d515SAlexander Duyck __le64 *regval = (__le64 *)va; 459b534550aSAlexander Duyck 460b534550aSAlexander Duyck /* 461b534550aSAlexander Duyck * The timestamp is recorded in little endian format. 462b534550aSAlexander Duyck * DWORD: 0 1 2 3 463b534550aSAlexander Duyck * Field: Reserved Reserved SYSTIML SYSTIMH 464b534550aSAlexander Duyck */ 465b534550aSAlexander Duyck igb_ptp_systim_to_hwtstamp(q_vector->adapter, skb_hwtstamps(skb), 466b534550aSAlexander Duyck le64_to_cpu(regval[1])); 467b534550aSAlexander Duyck } 468b534550aSAlexander Duyck 469b534550aSAlexander Duyck /** 470b534550aSAlexander Duyck * igb_ptp_rx_rgtstamp - retrieve Rx timestamp stored in register 471b534550aSAlexander Duyck * @q_vector: Pointer to interrupt specific structure 472b534550aSAlexander Duyck * @skb: Buffer containing timestamp and packet 473b534550aSAlexander Duyck * 474b534550aSAlexander Duyck * This function is meant to retrieve a timestamp from the internal registers 475b534550aSAlexander Duyck * of the adapter and store it in the skb. 476b534550aSAlexander Duyck */ 477b534550aSAlexander Duyck void igb_ptp_rx_rgtstamp(struct igb_q_vector *q_vector, 478a79f4f88SMatthew Vick struct sk_buff *skb) 479a79f4f88SMatthew Vick { 480a79f4f88SMatthew Vick struct igb_adapter *adapter = q_vector->adapter; 481a79f4f88SMatthew Vick struct e1000_hw *hw = &adapter->hw; 482a79f4f88SMatthew Vick u64 regval; 483a79f4f88SMatthew Vick 484a79f4f88SMatthew Vick /* 485a79f4f88SMatthew Vick * If this bit is set, then the RX registers contain the time stamp. No 486a79f4f88SMatthew Vick * other packet will be time stamped until we read these registers, so 487a79f4f88SMatthew Vick * read the registers to make them available again. Because only one 488a79f4f88SMatthew Vick * packet can be time stamped at a time, we know that the register 489a79f4f88SMatthew Vick * values must belong to this one here and therefore we don't need to 490a79f4f88SMatthew Vick * compare any of the additional attributes stored for it. 491a79f4f88SMatthew Vick * 492a79f4f88SMatthew Vick * If nothing went wrong, then it should have a shared tx_flags that we 493a79f4f88SMatthew Vick * can turn into a skb_shared_hwtstamps. 494a79f4f88SMatthew Vick */ 495a79f4f88SMatthew Vick if (!(rd32(E1000_TSYNCRXCTL) & E1000_TSYNCRXCTL_VALID)) 496a79f4f88SMatthew Vick return; 497a79f4f88SMatthew Vick 498a79f4f88SMatthew Vick regval = rd32(E1000_RXSTMPL); 499a79f4f88SMatthew Vick regval |= (u64)rd32(E1000_RXSTMPH) << 32; 500a79f4f88SMatthew Vick 501a79f4f88SMatthew Vick igb_ptp_systim_to_hwtstamp(adapter, skb_hwtstamps(skb), regval); 502a79f4f88SMatthew Vick } 503a79f4f88SMatthew Vick 504a79f4f88SMatthew Vick /** 505a79f4f88SMatthew Vick * igb_ptp_hwtstamp_ioctl - control hardware time stamping 506a79f4f88SMatthew Vick * @netdev: 507a79f4f88SMatthew Vick * @ifreq: 508a79f4f88SMatthew Vick * @cmd: 509a79f4f88SMatthew Vick * 510a79f4f88SMatthew Vick * Outgoing time stamping can be enabled and disabled. Play nice and 511a79f4f88SMatthew Vick * disable it when requested, although it shouldn't case any overhead 512a79f4f88SMatthew Vick * when no packet needs it. At most one packet in the queue may be 513a79f4f88SMatthew Vick * marked for time stamping, otherwise it would be impossible to tell 514a79f4f88SMatthew Vick * for sure to which packet the hardware time stamp belongs. 515a79f4f88SMatthew Vick * 516a79f4f88SMatthew Vick * Incoming time stamping has to be configured via the hardware 517a79f4f88SMatthew Vick * filters. Not all combinations are supported, in particular event 518a79f4f88SMatthew Vick * type has to be specified. Matching the kind of event packet is 519a79f4f88SMatthew Vick * not supported, with the exception of "all V2 events regardless of 520a79f4f88SMatthew Vick * level 2 or 4". 521a79f4f88SMatthew Vick * 522a79f4f88SMatthew Vick **/ 523a79f4f88SMatthew Vick int igb_ptp_hwtstamp_ioctl(struct net_device *netdev, 524a79f4f88SMatthew Vick struct ifreq *ifr, int cmd) 525a79f4f88SMatthew Vick { 526a79f4f88SMatthew Vick struct igb_adapter *adapter = netdev_priv(netdev); 527a79f4f88SMatthew Vick struct e1000_hw *hw = &adapter->hw; 528a79f4f88SMatthew Vick struct hwtstamp_config config; 529a79f4f88SMatthew Vick u32 tsync_tx_ctl = E1000_TSYNCTXCTL_ENABLED; 530a79f4f88SMatthew Vick u32 tsync_rx_ctl = E1000_TSYNCRXCTL_ENABLED; 531a79f4f88SMatthew Vick u32 tsync_rx_cfg = 0; 532a79f4f88SMatthew Vick bool is_l4 = false; 533a79f4f88SMatthew Vick bool is_l2 = false; 534a79f4f88SMatthew Vick u32 regval; 535a79f4f88SMatthew Vick 536a79f4f88SMatthew Vick if (copy_from_user(&config, ifr->ifr_data, sizeof(config))) 537a79f4f88SMatthew Vick return -EFAULT; 538a79f4f88SMatthew Vick 539a79f4f88SMatthew Vick /* reserved for future extensions */ 540a79f4f88SMatthew Vick if (config.flags) 541a79f4f88SMatthew Vick return -EINVAL; 542a79f4f88SMatthew Vick 543a79f4f88SMatthew Vick switch (config.tx_type) { 544a79f4f88SMatthew Vick case HWTSTAMP_TX_OFF: 545a79f4f88SMatthew Vick tsync_tx_ctl = 0; 546a79f4f88SMatthew Vick case HWTSTAMP_TX_ON: 547a79f4f88SMatthew Vick break; 548a79f4f88SMatthew Vick default: 549a79f4f88SMatthew Vick return -ERANGE; 550a79f4f88SMatthew Vick } 551a79f4f88SMatthew Vick 552a79f4f88SMatthew Vick switch (config.rx_filter) { 553a79f4f88SMatthew Vick case HWTSTAMP_FILTER_NONE: 554a79f4f88SMatthew Vick tsync_rx_ctl = 0; 555a79f4f88SMatthew Vick break; 556a79f4f88SMatthew Vick case HWTSTAMP_FILTER_PTP_V1_L4_EVENT: 557a79f4f88SMatthew Vick case HWTSTAMP_FILTER_PTP_V2_L4_EVENT: 558a79f4f88SMatthew Vick case HWTSTAMP_FILTER_PTP_V2_L2_EVENT: 559a79f4f88SMatthew Vick case HWTSTAMP_FILTER_ALL: 560a79f4f88SMatthew Vick /* 561a79f4f88SMatthew Vick * register TSYNCRXCFG must be set, therefore it is not 562a79f4f88SMatthew Vick * possible to time stamp both Sync and Delay_Req messages 563a79f4f88SMatthew Vick * => fall back to time stamping all packets 564a79f4f88SMatthew Vick */ 565a79f4f88SMatthew Vick tsync_rx_ctl |= E1000_TSYNCRXCTL_TYPE_ALL; 566a79f4f88SMatthew Vick config.rx_filter = HWTSTAMP_FILTER_ALL; 567a79f4f88SMatthew Vick break; 568a79f4f88SMatthew Vick case HWTSTAMP_FILTER_PTP_V1_L4_SYNC: 569a79f4f88SMatthew Vick tsync_rx_ctl |= E1000_TSYNCRXCTL_TYPE_L4_V1; 570a79f4f88SMatthew Vick tsync_rx_cfg = E1000_TSYNCRXCFG_PTP_V1_SYNC_MESSAGE; 571a79f4f88SMatthew Vick is_l4 = true; 572a79f4f88SMatthew Vick break; 573a79f4f88SMatthew Vick case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ: 574a79f4f88SMatthew Vick tsync_rx_ctl |= E1000_TSYNCRXCTL_TYPE_L4_V1; 575a79f4f88SMatthew Vick tsync_rx_cfg = E1000_TSYNCRXCFG_PTP_V1_DELAY_REQ_MESSAGE; 576a79f4f88SMatthew Vick is_l4 = true; 577a79f4f88SMatthew Vick break; 578a79f4f88SMatthew Vick case HWTSTAMP_FILTER_PTP_V2_L2_SYNC: 579a79f4f88SMatthew Vick case HWTSTAMP_FILTER_PTP_V2_L4_SYNC: 580a79f4f88SMatthew Vick tsync_rx_ctl |= E1000_TSYNCRXCTL_TYPE_L2_L4_V2; 581a79f4f88SMatthew Vick tsync_rx_cfg = E1000_TSYNCRXCFG_PTP_V2_SYNC_MESSAGE; 582a79f4f88SMatthew Vick is_l2 = true; 583a79f4f88SMatthew Vick is_l4 = true; 584a79f4f88SMatthew Vick config.rx_filter = HWTSTAMP_FILTER_SOME; 585a79f4f88SMatthew Vick break; 586a79f4f88SMatthew Vick case HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ: 587a79f4f88SMatthew Vick case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ: 588a79f4f88SMatthew Vick tsync_rx_ctl |= E1000_TSYNCRXCTL_TYPE_L2_L4_V2; 589a79f4f88SMatthew Vick tsync_rx_cfg = E1000_TSYNCRXCFG_PTP_V2_DELAY_REQ_MESSAGE; 590a79f4f88SMatthew Vick is_l2 = true; 591a79f4f88SMatthew Vick is_l4 = true; 592a79f4f88SMatthew Vick config.rx_filter = HWTSTAMP_FILTER_SOME; 593a79f4f88SMatthew Vick break; 594a79f4f88SMatthew Vick case HWTSTAMP_FILTER_PTP_V2_EVENT: 595a79f4f88SMatthew Vick case HWTSTAMP_FILTER_PTP_V2_SYNC: 596a79f4f88SMatthew Vick case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ: 597a79f4f88SMatthew Vick tsync_rx_ctl |= E1000_TSYNCRXCTL_TYPE_EVENT_V2; 598a79f4f88SMatthew Vick config.rx_filter = HWTSTAMP_FILTER_PTP_V2_EVENT; 599a79f4f88SMatthew Vick is_l2 = true; 600a79f4f88SMatthew Vick is_l4 = true; 601a79f4f88SMatthew Vick break; 602a79f4f88SMatthew Vick default: 603a79f4f88SMatthew Vick return -ERANGE; 604a79f4f88SMatthew Vick } 605a79f4f88SMatthew Vick 606a79f4f88SMatthew Vick if (hw->mac.type == e1000_82575) { 607a79f4f88SMatthew Vick if (tsync_rx_ctl | tsync_tx_ctl) 608a79f4f88SMatthew Vick return -EINVAL; 609a79f4f88SMatthew Vick return 0; 610a79f4f88SMatthew Vick } 611a79f4f88SMatthew Vick 612a79f4f88SMatthew Vick /* 613a79f4f88SMatthew Vick * Per-packet timestamping only works if all packets are 614a79f4f88SMatthew Vick * timestamped, so enable timestamping in all packets as 615a79f4f88SMatthew Vick * long as one rx filter was configured. 616a79f4f88SMatthew Vick */ 617a79f4f88SMatthew Vick if ((hw->mac.type >= e1000_82580) && tsync_rx_ctl) { 618a79f4f88SMatthew Vick tsync_rx_ctl = E1000_TSYNCRXCTL_ENABLED; 619a79f4f88SMatthew Vick tsync_rx_ctl |= E1000_TSYNCRXCTL_TYPE_ALL; 620e57b8bdbSMatthew Vick 621e57b8bdbSMatthew Vick if ((hw->mac.type == e1000_i210) || 622e57b8bdbSMatthew Vick (hw->mac.type == e1000_i211)) { 623e57b8bdbSMatthew Vick regval = rd32(E1000_RXPBS); 624e57b8bdbSMatthew Vick regval |= E1000_RXPBS_CFG_TS_EN; 625e57b8bdbSMatthew Vick wr32(E1000_RXPBS, regval); 626e57b8bdbSMatthew Vick } 627a79f4f88SMatthew Vick } 628a79f4f88SMatthew Vick 629a79f4f88SMatthew Vick /* enable/disable TX */ 630a79f4f88SMatthew Vick regval = rd32(E1000_TSYNCTXCTL); 631a79f4f88SMatthew Vick regval &= ~E1000_TSYNCTXCTL_ENABLED; 632a79f4f88SMatthew Vick regval |= tsync_tx_ctl; 633a79f4f88SMatthew Vick wr32(E1000_TSYNCTXCTL, regval); 634a79f4f88SMatthew Vick 635a79f4f88SMatthew Vick /* enable/disable RX */ 636a79f4f88SMatthew Vick regval = rd32(E1000_TSYNCRXCTL); 637a79f4f88SMatthew Vick regval &= ~(E1000_TSYNCRXCTL_ENABLED | E1000_TSYNCRXCTL_TYPE_MASK); 638a79f4f88SMatthew Vick regval |= tsync_rx_ctl; 639a79f4f88SMatthew Vick wr32(E1000_TSYNCRXCTL, regval); 640a79f4f88SMatthew Vick 641a79f4f88SMatthew Vick /* define which PTP packets are time stamped */ 642a79f4f88SMatthew Vick wr32(E1000_TSYNCRXCFG, tsync_rx_cfg); 643a79f4f88SMatthew Vick 644a79f4f88SMatthew Vick /* define ethertype filter for timestamped packets */ 645a79f4f88SMatthew Vick if (is_l2) 646a79f4f88SMatthew Vick wr32(E1000_ETQF(3), 647a79f4f88SMatthew Vick (E1000_ETQF_FILTER_ENABLE | /* enable filter */ 648a79f4f88SMatthew Vick E1000_ETQF_1588 | /* enable timestamping */ 649a79f4f88SMatthew Vick ETH_P_1588)); /* 1588 eth protocol type */ 650a79f4f88SMatthew Vick else 651a79f4f88SMatthew Vick wr32(E1000_ETQF(3), 0); 652a79f4f88SMatthew Vick 653a79f4f88SMatthew Vick #define PTP_PORT 319 654a79f4f88SMatthew Vick /* L4 Queue Filter[3]: filter by destination port and protocol */ 655a79f4f88SMatthew Vick if (is_l4) { 656a79f4f88SMatthew Vick u32 ftqf = (IPPROTO_UDP /* UDP */ 657a79f4f88SMatthew Vick | E1000_FTQF_VF_BP /* VF not compared */ 658a79f4f88SMatthew Vick | E1000_FTQF_1588_TIME_STAMP /* Enable Timestamping */ 659a79f4f88SMatthew Vick | E1000_FTQF_MASK); /* mask all inputs */ 660a79f4f88SMatthew Vick ftqf &= ~E1000_FTQF_MASK_PROTO_BP; /* enable protocol check */ 661a79f4f88SMatthew Vick 662a79f4f88SMatthew Vick wr32(E1000_IMIR(3), htons(PTP_PORT)); 663a79f4f88SMatthew Vick wr32(E1000_IMIREXT(3), 664a79f4f88SMatthew Vick (E1000_IMIREXT_SIZE_BP | E1000_IMIREXT_CTRL_BP)); 665a79f4f88SMatthew Vick if (hw->mac.type == e1000_82576) { 666a79f4f88SMatthew Vick /* enable source port check */ 667a79f4f88SMatthew Vick wr32(E1000_SPQF(3), htons(PTP_PORT)); 668a79f4f88SMatthew Vick ftqf &= ~E1000_FTQF_MASK_SOURCE_PORT_BP; 669a79f4f88SMatthew Vick } 670a79f4f88SMatthew Vick wr32(E1000_FTQF(3), ftqf); 671a79f4f88SMatthew Vick } else { 672a79f4f88SMatthew Vick wr32(E1000_FTQF(3), E1000_FTQF_MASK); 673a79f4f88SMatthew Vick } 674a79f4f88SMatthew Vick wrfl(); 675a79f4f88SMatthew Vick 676a79f4f88SMatthew Vick /* clear TX/RX time stamp registers, just to be sure */ 677e57b8bdbSMatthew Vick regval = rd32(E1000_TXSTMPL); 678a79f4f88SMatthew Vick regval = rd32(E1000_TXSTMPH); 679e57b8bdbSMatthew Vick regval = rd32(E1000_RXSTMPL); 680a79f4f88SMatthew Vick regval = rd32(E1000_RXSTMPH); 681a79f4f88SMatthew Vick 682a79f4f88SMatthew Vick return copy_to_user(ifr->ifr_data, &config, sizeof(config)) ? 683a79f4f88SMatthew Vick -EFAULT : 0; 684d339b133SRichard Cochran } 685d339b133SRichard Cochran 686d339b133SRichard Cochran void igb_ptp_init(struct igb_adapter *adapter) 687d339b133SRichard Cochran { 688d339b133SRichard Cochran struct e1000_hw *hw = &adapter->hw; 689201987e3SMatthew Vick struct net_device *netdev = adapter->netdev; 690d339b133SRichard Cochran 691d339b133SRichard Cochran switch (hw->mac.type) { 692d339b133SRichard Cochran case e1000_82576: 693201987e3SMatthew Vick snprintf(adapter->ptp_caps.name, 16, "%pm", netdev->dev_addr); 694a79f4f88SMatthew Vick adapter->ptp_caps.owner = THIS_MODULE; 695a79f4f88SMatthew Vick adapter->ptp_caps.max_adj = 1000000000; 696a79f4f88SMatthew Vick adapter->ptp_caps.n_ext_ts = 0; 697a79f4f88SMatthew Vick adapter->ptp_caps.pps = 0; 698a79f4f88SMatthew Vick adapter->ptp_caps.adjfreq = igb_ptp_adjfreq_82576; 699e57b8bdbSMatthew Vick adapter->ptp_caps.adjtime = igb_ptp_adjtime_82576; 700e57b8bdbSMatthew Vick adapter->ptp_caps.gettime = igb_ptp_gettime_82576; 701e57b8bdbSMatthew Vick adapter->ptp_caps.settime = igb_ptp_settime_82576; 702a79f4f88SMatthew Vick adapter->ptp_caps.enable = igb_ptp_enable; 703a79f4f88SMatthew Vick adapter->cc.read = igb_ptp_read_82576; 704d339b133SRichard Cochran adapter->cc.mask = CLOCKSOURCE_MASK(64); 705d339b133SRichard Cochran adapter->cc.mult = 1; 706d339b133SRichard Cochran adapter->cc.shift = IGB_82576_TSYNC_SHIFT; 707d339b133SRichard Cochran /* Dial the nominal frequency. */ 708d339b133SRichard Cochran wr32(E1000_TIMINCA, INCPERIOD_82576 | INCVALUE_82576); 709d339b133SRichard Cochran break; 710e57b8bdbSMatthew Vick case e1000_82580: 711e57b8bdbSMatthew Vick case e1000_i350: 712e57b8bdbSMatthew Vick snprintf(adapter->ptp_caps.name, 16, "%pm", netdev->dev_addr); 713e57b8bdbSMatthew Vick adapter->ptp_caps.owner = THIS_MODULE; 714e57b8bdbSMatthew Vick adapter->ptp_caps.max_adj = 62499999; 715e57b8bdbSMatthew Vick adapter->ptp_caps.n_ext_ts = 0; 716e57b8bdbSMatthew Vick adapter->ptp_caps.pps = 0; 717e57b8bdbSMatthew Vick adapter->ptp_caps.adjfreq = igb_ptp_adjfreq_82580; 718e57b8bdbSMatthew Vick adapter->ptp_caps.adjtime = igb_ptp_adjtime_82576; 719e57b8bdbSMatthew Vick adapter->ptp_caps.gettime = igb_ptp_gettime_82576; 720e57b8bdbSMatthew Vick adapter->ptp_caps.settime = igb_ptp_settime_82576; 721e57b8bdbSMatthew Vick adapter->ptp_caps.enable = igb_ptp_enable; 722e57b8bdbSMatthew Vick adapter->cc.read = igb_ptp_read_82580; 723e57b8bdbSMatthew Vick adapter->cc.mask = CLOCKSOURCE_MASK(IGB_NBITS_82580); 724e57b8bdbSMatthew Vick adapter->cc.mult = 1; 725e57b8bdbSMatthew Vick adapter->cc.shift = 0; 726e57b8bdbSMatthew Vick /* Enable the timer functions by clearing bit 31. */ 727e57b8bdbSMatthew Vick wr32(E1000_TSAUXC, 0x0); 728e57b8bdbSMatthew Vick break; 729e57b8bdbSMatthew Vick case e1000_i210: 730e57b8bdbSMatthew Vick case e1000_i211: 731e57b8bdbSMatthew Vick snprintf(adapter->ptp_caps.name, 16, "%pm", netdev->dev_addr); 732e57b8bdbSMatthew Vick adapter->ptp_caps.owner = THIS_MODULE; 733e57b8bdbSMatthew Vick adapter->ptp_caps.max_adj = 62499999; 734e57b8bdbSMatthew Vick adapter->ptp_caps.n_ext_ts = 0; 735e57b8bdbSMatthew Vick adapter->ptp_caps.pps = 0; 736e57b8bdbSMatthew Vick adapter->ptp_caps.adjfreq = igb_ptp_adjfreq_82580; 737e57b8bdbSMatthew Vick adapter->ptp_caps.adjtime = igb_ptp_adjtime_i210; 738e57b8bdbSMatthew Vick adapter->ptp_caps.gettime = igb_ptp_gettime_i210; 739e57b8bdbSMatthew Vick adapter->ptp_caps.settime = igb_ptp_settime_i210; 740e57b8bdbSMatthew Vick adapter->ptp_caps.enable = igb_ptp_enable; 741e57b8bdbSMatthew Vick /* Enable the timer functions by clearing bit 31. */ 742e57b8bdbSMatthew Vick wr32(E1000_TSAUXC, 0x0); 743e57b8bdbSMatthew Vick break; 744d339b133SRichard Cochran default: 745d339b133SRichard Cochran adapter->ptp_clock = NULL; 746d339b133SRichard Cochran return; 747d339b133SRichard Cochran } 748d339b133SRichard Cochran 749d339b133SRichard Cochran wrfl(); 750d339b133SRichard Cochran 751e57b8bdbSMatthew Vick spin_lock_init(&adapter->tmreg_lock); 752e57b8bdbSMatthew Vick INIT_WORK(&adapter->ptp_tx_work, igb_ptp_tx_work); 753e57b8bdbSMatthew Vick 754e57b8bdbSMatthew Vick /* Initialize the clock and overflow work for devices that need it. */ 755e57b8bdbSMatthew Vick if ((hw->mac.type == e1000_i210) || (hw->mac.type == e1000_i211)) { 756e57b8bdbSMatthew Vick struct timespec ts = ktime_to_timespec(ktime_get_real()); 757e57b8bdbSMatthew Vick 758e57b8bdbSMatthew Vick igb_ptp_settime_i210(&adapter->ptp_caps, &ts); 759e57b8bdbSMatthew Vick } else { 760d339b133SRichard Cochran timecounter_init(&adapter->tc, &adapter->cc, 761d339b133SRichard Cochran ktime_to_ns(ktime_get_real())); 762d339b133SRichard Cochran 763e57b8bdbSMatthew Vick INIT_DELAYED_WORK(&adapter->ptp_overflow_work, 764e57b8bdbSMatthew Vick igb_ptp_overflow_check); 7651f6e8178SMatthew Vick 766a79f4f88SMatthew Vick schedule_delayed_work(&adapter->ptp_overflow_work, 767a79f4f88SMatthew Vick IGB_SYSTIM_OVERFLOW_PERIOD); 768e57b8bdbSMatthew Vick } 769d339b133SRichard Cochran 7701f6e8178SMatthew Vick /* Initialize the time sync interrupts for devices that support it. */ 7711f6e8178SMatthew Vick if (hw->mac.type >= e1000_82580) { 7721f6e8178SMatthew Vick wr32(E1000_TSIM, E1000_TSIM_TXTS); 7731f6e8178SMatthew Vick wr32(E1000_IMS, E1000_IMS_TS); 7741f6e8178SMatthew Vick } 7751f6e8178SMatthew Vick 7761ef76158SRichard Cochran adapter->ptp_clock = ptp_clock_register(&adapter->ptp_caps, 7771ef76158SRichard Cochran &adapter->pdev->dev); 778d339b133SRichard Cochran if (IS_ERR(adapter->ptp_clock)) { 779d339b133SRichard Cochran adapter->ptp_clock = NULL; 780d339b133SRichard Cochran dev_err(&adapter->pdev->dev, "ptp_clock_register failed\n"); 7811f6e8178SMatthew Vick } else { 782d339b133SRichard Cochran dev_info(&adapter->pdev->dev, "added PHC on %s\n", 783d339b133SRichard Cochran adapter->netdev->name); 7841f6e8178SMatthew Vick adapter->flags |= IGB_FLAG_PTP; 7851f6e8178SMatthew Vick } 786d339b133SRichard Cochran } 787d339b133SRichard Cochran 788a79f4f88SMatthew Vick /** 789a79f4f88SMatthew Vick * igb_ptp_stop - Disable PTP device and stop the overflow check. 790a79f4f88SMatthew Vick * @adapter: Board private structure. 791a79f4f88SMatthew Vick * 792a79f4f88SMatthew Vick * This function stops the PTP support and cancels the delayed work. 793a79f4f88SMatthew Vick **/ 794a79f4f88SMatthew Vick void igb_ptp_stop(struct igb_adapter *adapter) 795d339b133SRichard Cochran { 796d3eef8c8SCarolyn Wyborny switch (adapter->hw.mac.type) { 797d3eef8c8SCarolyn Wyborny case e1000_82576: 7981f6e8178SMatthew Vick case e1000_82580: 7991f6e8178SMatthew Vick case e1000_i350: 800a79f4f88SMatthew Vick cancel_delayed_work_sync(&adapter->ptp_overflow_work); 801d3eef8c8SCarolyn Wyborny break; 8021f6e8178SMatthew Vick case e1000_i210: 8031f6e8178SMatthew Vick case e1000_i211: 8041f6e8178SMatthew Vick /* No delayed work to cancel. */ 8051f6e8178SMatthew Vick break; 806d3eef8c8SCarolyn Wyborny default: 807d3eef8c8SCarolyn Wyborny return; 808d3eef8c8SCarolyn Wyborny } 809d339b133SRichard Cochran 8101f6e8178SMatthew Vick cancel_work_sync(&adapter->ptp_tx_work); 8111f6e8178SMatthew Vick 812d339b133SRichard Cochran if (adapter->ptp_clock) { 813d339b133SRichard Cochran ptp_clock_unregister(adapter->ptp_clock); 814d339b133SRichard Cochran dev_info(&adapter->pdev->dev, "removed PHC on %s\n", 815d339b133SRichard Cochran adapter->netdev->name); 8161f6e8178SMatthew Vick adapter->flags &= ~IGB_FLAG_PTP; 817d339b133SRichard Cochran } 818d339b133SRichard Cochran } 8191f6e8178SMatthew Vick 8201f6e8178SMatthew Vick /** 8211f6e8178SMatthew Vick * igb_ptp_reset - Re-enable the adapter for PTP following a reset. 8221f6e8178SMatthew Vick * @adapter: Board private structure. 8231f6e8178SMatthew Vick * 8241f6e8178SMatthew Vick * This function handles the reset work required to re-enable the PTP device. 8251f6e8178SMatthew Vick **/ 8261f6e8178SMatthew Vick void igb_ptp_reset(struct igb_adapter *adapter) 8271f6e8178SMatthew Vick { 8281f6e8178SMatthew Vick struct e1000_hw *hw = &adapter->hw; 8291f6e8178SMatthew Vick 8301f6e8178SMatthew Vick if (!(adapter->flags & IGB_FLAG_PTP)) 8311f6e8178SMatthew Vick return; 8321f6e8178SMatthew Vick 8331f6e8178SMatthew Vick switch (adapter->hw.mac.type) { 8341f6e8178SMatthew Vick case e1000_82576: 8351f6e8178SMatthew Vick /* Dial the nominal frequency. */ 8361f6e8178SMatthew Vick wr32(E1000_TIMINCA, INCPERIOD_82576 | INCVALUE_82576); 8371f6e8178SMatthew Vick break; 8381f6e8178SMatthew Vick case e1000_82580: 8391f6e8178SMatthew Vick case e1000_i350: 8401f6e8178SMatthew Vick case e1000_i210: 8411f6e8178SMatthew Vick case e1000_i211: 8421f6e8178SMatthew Vick /* Enable the timer functions and interrupts. */ 8431f6e8178SMatthew Vick wr32(E1000_TSAUXC, 0x0); 8441f6e8178SMatthew Vick wr32(E1000_TSIM, E1000_TSIM_TXTS); 8451f6e8178SMatthew Vick wr32(E1000_IMS, E1000_IMS_TS); 8461f6e8178SMatthew Vick break; 8471f6e8178SMatthew Vick default: 8481f6e8178SMatthew Vick /* No work to do. */ 8491f6e8178SMatthew Vick return; 8501f6e8178SMatthew Vick } 8511f6e8178SMatthew Vick 852e57b8bdbSMatthew Vick /* Re-initialize the timer. */ 853e57b8bdbSMatthew Vick if ((hw->mac.type == e1000_i210) || (hw->mac.type == e1000_i211)) { 854e57b8bdbSMatthew Vick struct timespec ts = ktime_to_timespec(ktime_get_real()); 855e57b8bdbSMatthew Vick 856e57b8bdbSMatthew Vick igb_ptp_settime_i210(&adapter->ptp_caps, &ts); 857e57b8bdbSMatthew Vick } else { 8581f6e8178SMatthew Vick timecounter_init(&adapter->tc, &adapter->cc, 8591f6e8178SMatthew Vick ktime_to_ns(ktime_get_real())); 8601f6e8178SMatthew Vick } 861e57b8bdbSMatthew Vick } 862