diff options
Diffstat (limited to 'drivers/net/ethernet/intel/igb/igb_ptp.c')
| -rw-r--r-- | drivers/net/ethernet/intel/igb/igb_ptp.c | 192 |
1 files changed, 178 insertions, 14 deletions
diff --git a/drivers/net/ethernet/intel/igb/igb_ptp.c b/drivers/net/ethernet/intel/igb/igb_ptp.c index 0011b15e678c..6580fcddb4be 100644 --- a/drivers/net/ethernet/intel/igb/igb_ptp.c +++ b/drivers/net/ethernet/intel/igb/igb_ptp.c @@ -69,6 +69,7 @@ #define IGB_NBITS_82580 40 static void igb_ptp_tx_hwtstamp(struct igb_adapter *adapter); +static void igb_ptp_sdp_init(struct igb_adapter *adapter); /* SYSTIM read access for the 82576 */ static u64 igb_ptp_read_82576(const struct cyclecounter *cc) @@ -507,6 +508,158 @@ static void igb_pin_perout(struct igb_adapter *igb, int chan, int pin, int freq) wr32(E1000_CTRL_EXT, ctrl_ext); } +static int igb_ptp_feature_enable_82580(struct ptp_clock_info *ptp, + struct ptp_clock_request *rq, int on) +{ + struct igb_adapter *igb = + container_of(ptp, struct igb_adapter, ptp_caps); + u32 tsauxc, tsim, tsauxc_mask, tsim_mask, trgttiml, trgttimh, systiml, + systimh, level_mask, level, rem; + struct e1000_hw *hw = &igb->hw; + struct timespec64 ts, start; + unsigned long flags; + u64 systim, now; + int pin = -1; + s64 ns; + + switch (rq->type) { + case PTP_CLK_REQ_EXTTS: + /* Reject requests with unsupported flags */ + if (rq->extts.flags & ~(PTP_ENABLE_FEATURE | + PTP_RISING_EDGE | + PTP_FALLING_EDGE | + PTP_STRICT_FLAGS)) + return -EOPNOTSUPP; + + if (on) { + pin = ptp_find_pin(igb->ptp_clock, PTP_PF_EXTTS, + rq->extts.index); + if (pin < 0) + return -EBUSY; + } + if (rq->extts.index == 1) { + tsauxc_mask = TSAUXC_EN_TS1; + tsim_mask = TSINTR_AUTT1; + } else { + tsauxc_mask = TSAUXC_EN_TS0; + tsim_mask = TSINTR_AUTT0; + } + spin_lock_irqsave(&igb->tmreg_lock, flags); + tsauxc = rd32(E1000_TSAUXC); + tsim = rd32(E1000_TSIM); + if (on) { + igb_pin_extts(igb, rq->extts.index, pin); + tsauxc |= tsauxc_mask; + tsim |= tsim_mask; + } else { + tsauxc &= ~tsauxc_mask; + tsim &= ~tsim_mask; + } + wr32(E1000_TSAUXC, tsauxc); + wr32(E1000_TSIM, tsim); + spin_unlock_irqrestore(&igb->tmreg_lock, flags); + return 0; + + case PTP_CLK_REQ_PEROUT: + /* Reject requests with unsupported flags */ + if (rq->perout.flags) + return -EOPNOTSUPP; + + if (on) { + pin = ptp_find_pin(igb->ptp_clock, PTP_PF_PEROUT, + rq->perout.index); + if (pin < 0) + return -EBUSY; + } + ts.tv_sec = rq->perout.period.sec; + ts.tv_nsec = rq->perout.period.nsec; + ns = timespec64_to_ns(&ts); + ns = ns >> 1; + if (on && ns < 8LL) + return -EINVAL; + ts = ns_to_timespec64(ns); + if (rq->perout.index == 1) { + tsauxc_mask = TSAUXC_EN_TT1; + tsim_mask = TSINTR_TT1; + trgttiml = E1000_TRGTTIML1; + trgttimh = E1000_TRGTTIMH1; + } else { + tsauxc_mask = TSAUXC_EN_TT0; + tsim_mask = TSINTR_TT0; + trgttiml = E1000_TRGTTIML0; + trgttimh = E1000_TRGTTIMH0; + } + spin_lock_irqsave(&igb->tmreg_lock, flags); + tsauxc = rd32(E1000_TSAUXC); + tsim = rd32(E1000_TSIM); + if (rq->perout.index == 1) { + tsauxc &= ~(TSAUXC_EN_TT1 | TSAUXC_EN_CLK1 | TSAUXC_ST1); + tsim &= ~TSINTR_TT1; + } else { + tsauxc &= ~(TSAUXC_EN_TT0 | TSAUXC_EN_CLK0 | TSAUXC_ST0); + tsim &= ~TSINTR_TT0; + } + if (on) { + int i = rq->perout.index; + + /* read systim registers in sequence */ + rd32(E1000_SYSTIMR); + systiml = rd32(E1000_SYSTIML); + systimh = rd32(E1000_SYSTIMH); + systim = (((u64)(systimh & 0xFF)) << 32) | ((u64)systiml); + now = timecounter_cyc2time(&igb->tc, systim); + + if (pin < 2) { + level_mask = (i == 1) ? 0x80000 : 0x40000; + level = (rd32(E1000_CTRL) & level_mask) ? 1 : 0; + } else { + level_mask = (i == 1) ? 0x80 : 0x40; + level = (rd32(E1000_CTRL_EXT) & level_mask) ? 1 : 0; + } + + div_u64_rem(now, ns, &rem); + systim = systim + (ns - rem); + + /* synchronize pin level with rising/falling edges */ + div_u64_rem(now, ns << 1, &rem); + if (rem < ns) { + /* first half of period */ + if (level == 0) { + /* output is already low, skip this period */ + systim += ns; + } + } else { + /* second half of period */ + if (level == 1) { + /* output is already high, skip this period */ + systim += ns; + } + } + + start = ns_to_timespec64(systim + (ns - rem)); + igb_pin_perout(igb, i, pin, 0); + igb->perout[i].start.tv_sec = start.tv_sec; + igb->perout[i].start.tv_nsec = start.tv_nsec; + igb->perout[i].period.tv_sec = ts.tv_sec; + igb->perout[i].period.tv_nsec = ts.tv_nsec; + + wr32(trgttiml, (u32)systim); + wr32(trgttimh, ((u32)(systim >> 32)) & 0xFF); + tsauxc |= tsauxc_mask; + tsim |= tsim_mask; + } + wr32(E1000_TSAUXC, tsauxc); + wr32(E1000_TSIM, tsim); + spin_unlock_irqrestore(&igb->tmreg_lock, flags); + return 0; + + case PTP_CLK_REQ_PPS: + return -EOPNOTSUPP; + } + + return -EOPNOTSUPP; +} + static int igb_ptp_feature_enable_i210(struct ptp_clock_info *ptp, struct ptp_clock_request *rq, int on) { @@ -1015,10 +1168,6 @@ static int igb_ptp_set_timestamp_mode(struct igb_adapter *adapter, bool is_l2 = false; u32 regval; - /* reserved for future extensions */ - if (config->flags) - return -EINVAL; - switch (config->tx_type) { case HWTSTAMP_TX_OFF: tsync_tx_ctl = 0; @@ -1192,7 +1341,6 @@ void igb_ptp_init(struct igb_adapter *adapter) { struct e1000_hw *hw = &adapter->hw; struct net_device *netdev = adapter->netdev; - int i; switch (hw->mac.type) { case e1000_82576: @@ -1215,16 +1363,21 @@ void igb_ptp_init(struct igb_adapter *adapter) case e1000_82580: case e1000_i354: case e1000_i350: + igb_ptp_sdp_init(adapter); snprintf(adapter->ptp_caps.name, 16, "%pm", netdev->dev_addr); adapter->ptp_caps.owner = THIS_MODULE; adapter->ptp_caps.max_adj = 62499999; - adapter->ptp_caps.n_ext_ts = 0; + adapter->ptp_caps.n_ext_ts = IGB_N_EXTTS; + adapter->ptp_caps.n_per_out = IGB_N_PEROUT; + adapter->ptp_caps.n_pins = IGB_N_SDP; adapter->ptp_caps.pps = 0; + adapter->ptp_caps.pin_config = adapter->sdp_config; adapter->ptp_caps.adjfine = igb_ptp_adjfine_82580; adapter->ptp_caps.adjtime = igb_ptp_adjtime_82576; adapter->ptp_caps.gettimex64 = igb_ptp_gettimex_82580; adapter->ptp_caps.settime64 = igb_ptp_settime_82576; - adapter->ptp_caps.enable = igb_ptp_feature_enable; + adapter->ptp_caps.enable = igb_ptp_feature_enable_82580; + adapter->ptp_caps.verify = igb_ptp_verify_pin; adapter->cc.read = igb_ptp_read_82580; adapter->cc.mask = CYCLECOUNTER_MASK(IGB_NBITS_82580); adapter->cc.mult = 1; @@ -1233,13 +1386,7 @@ void igb_ptp_init(struct igb_adapter *adapter) break; case e1000_i210: case e1000_i211: - for (i = 0; i < IGB_N_SDP; i++) { - struct ptp_pin_desc *ppd = &adapter->sdp_config[i]; - - snprintf(ppd->name, sizeof(ppd->name), "SDP%d", i); - ppd->index = i; - ppd->func = PTP_PF_NONE; - } + igb_ptp_sdp_init(adapter); snprintf(adapter->ptp_caps.name, 16, "%pm", netdev->dev_addr); adapter->ptp_caps.owner = THIS_MODULE; adapter->ptp_caps.max_adj = 62499999; @@ -1285,6 +1432,23 @@ void igb_ptp_init(struct igb_adapter *adapter) } /** + * igb_ptp_sdp_init - utility function which inits the SDP config structs + * @adapter: Board private structure. + **/ +void igb_ptp_sdp_init(struct igb_adapter *adapter) +{ + int i; + + for (i = 0; i < IGB_N_SDP; i++) { + struct ptp_pin_desc *ppd = &adapter->sdp_config[i]; + + snprintf(ppd->name, sizeof(ppd->name), "SDP%d", i); + ppd->index = i; + ppd->func = PTP_PF_NONE; + } +} + +/** * igb_ptp_suspend - Disable PTP work items and prepare for suspend * @adapter: Board private structure * |