[PATCH net-next 0/4] igb: support PEROUT and EXTTS PTP pin functions on 82580/i354/i350

[PATCH net-next 0/4] igb: support PEROUT and EXTTS PTP pin functions on 82580/i354/i350

[Ruud Bos]

The igb driver provides support for PEROUT and EXTTS pin functions that
allow adapter external use of timing signals. At Hottinger Bruel & Kjaer we
are using the PEROUT function to feed a PTP corrected 1pps signal into an
FPGA as cross system synchronized time source.

Support for the PEROUT and EXTTS SDP functions is currently limited to
i210/i211 based adapters. This patch series enables these functions also
for 82580/i354/i350 based ones. Because the time registers of these
adapters do not have the nice split in second rollovers as the i210 has,
the implementation is slightly more complex compared to the i210
implementation.

The PEROUT function has been successfully tested on an i350 based ethernet
adapter. Using the following user space code excerpt, the driver outputs a
PTP corrected 1pps signal on the SDP0 pin of an i350:

    struct ptp_pin_desc desc;
    memset(&desc, 0, sizeof(desc));
    desc.index = 0;
    desc.func = PTP_PF_PEROUT;
    desc.chan = 0;
    if (ioctl(fd, PTP_PIN_SETFUNC, &desc) == 0) {
        struct timespec ts;
        if (clock_gettime(clkid, &ts) == 0) {
            struct ptp_perout_request rq;
            memset(&rq, 0, sizeof(rq));
            rq.index = 0;
            rq.start.sec = ts.tv_sec + 1;
            rq.start.nsec = 500000000;
            rq.period.sec  = 1;
            rq.period.nsec = 0;
            if (ioctl(fd, PTP_PEROUT_REQUEST, &rq) == 0) {
                /* 1pps signal is now available on SDP0 */
            }
        }
    }

The added EXTTS function has not been tested. However, looking at the data
sheets, the layout of the registers involved match the i210 exactly except
for the time registers mentioned before. Hence the almost identical
implementation.

Ruud Bos (4):
  igb: move SDP config initialization to separate function
  igb: move PEROUT and EXTTS isr logic to separate functions
  igb: support PEROUT on 82580/i354/i350
  support EXTTS on 82580/i354/i350

 drivers/net/ethernet/intel/igb/igb_main.c | 141 ++++++++++++-----
 drivers/net/ethernet/intel/igb/igb_ptp.c  | 183 ++++++++++++++++++++--
 2 files changed, 279 insertions(+), 45 deletions(-)

-- 
2.30.2

[PATCH net-next 1/4] igb: move SDP config initialization to separate function

[Ruud Bos]

Allow reuse of SDP config struct initialization by moving it to a
separate function.

Signed-off-by: Ruud Bos <kernel.hbk@gmail.com>
---
 drivers/net/ethernet/intel/igb/igb_ptp.c | 27 +++++++++++++++++-------
 1 file changed, 19 insertions(+), 8 deletions(-)

diff --git a/drivers/net/ethernet/intel/igb/igb_ptp.c b/drivers/net/ethernet/intel/igb/igb_ptp.c
index 0011b15e678c..c78d0c2a5341 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)
@@ -1192,7 +1193,6 @@ 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:
@@ -1233,13 +1233,7 @@ 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;
@@ -1284,6 +1278,23 @@ 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
-- 
2.30.2

[PATCH net-next 2/4] igb: move PEROUT and EXTTS isr logic to separate functions

[Ruud Bos]

Remove code duplication in the tsync interrupt handler function by moving
this logic to separate functions. This keeps the interrupt handler readable
and allows the new functions to be extended for adapter types other than
i210.

Signed-off-by: Ruud Bos <kernel.hbk@gmail.com>
---
 drivers/net/ethernet/intel/igb/igb_main.c | 79 +++++++++++++----------
 1 file changed, 44 insertions(+), 35 deletions(-)

diff --git a/drivers/net/ethernet/intel/igb/igb_main.c b/drivers/net/ethernet/intel/igb/igb_main.c
index e67a71c3f141..1ff9bc452fcf 100644
--- a/drivers/net/ethernet/intel/igb/igb_main.c
+++ b/drivers/net/ethernet/intel/igb/igb_main.c
@@ -6732,12 +6732,50 @@ void igb_update_stats(struct igb_adapter *adapter)
 	}
 }
 
+static void igb_perout(struct igb_adapter *adapter, int sdp)
+{
+	struct e1000_hw *hw = &adapter->hw;
+	struct timespec64 ts;
+	u32 tsauxc;
+
+	if (sdp < 0 || sdp >= IGB_N_PEROUT)
+		return;
+
+	spin_lock(&adapter->tmreg_lock);
+	ts = timespec64_add(adapter->perout[sdp].start,
+			    adapter->perout[sdp].period);
+	/* u32 conversion of tv_sec is safe until y2106 */
+	wr32((sdp == 1) ? E1000_TRGTTIML1 : E1000_TRGTTIML0, ts.tv_nsec);
+	wr32((sdp == 1) ? E1000_TRGTTIMH1 : E1000_TRGTTIMH0, (u32)ts.tv_sec);
+	tsauxc = rd32(E1000_TSAUXC);
+	tsauxc |= TSAUXC_EN_TT0;
+	wr32(E1000_TSAUXC, tsauxc);
+	adapter->perout[sdp].start = ts;
+	spin_unlock(&adapter->tmreg_lock);
+}
+
+static void igb_extts(struct igb_adapter *adapter, int sdp)
+{
+	struct e1000_hw *hw = &adapter->hw;
+	u32 sec, nsec;
+	struct ptp_clock_event event;
+
+	if (sdp < 0 || sdp >= IGB_N_EXTTS)
+		return;
+
+	nsec = rd32((sdp == 1) ? E1000_AUXSTMPL1 : E1000_AUXSTMPL0);
+	sec  = rd32((sdp == 1) ? E1000_AUXSTMPH1 : E1000_AUXSTMPH0);
+	event.type = PTP_CLOCK_EXTTS;
+	event.index = sdp;
+	event.timestamp = sec * 1000000000ULL + nsec;
+	ptp_clock_event(adapter->ptp_clock, &event);
+}
+
 static void igb_tsync_interrupt(struct igb_adapter *adapter)
 {
 	struct e1000_hw *hw = &adapter->hw;
 	struct ptp_clock_event event;
-	struct timespec64 ts;
-	u32 ack = 0, tsauxc, sec, nsec, tsicr = rd32(E1000_TSICR);
+	u32 ack = 0, tsicr = rd32(E1000_TSICR);
 
 	if (tsicr & TSINTR_SYS_WRAP) {
 		event.type = PTP_CLOCK_PPS;
@@ -6753,51 +6791,22 @@ static void igb_tsync_interrupt(struct igb_adapter *adapter)
 	}
 
 	if (tsicr & TSINTR_TT0) {
-		spin_lock(&adapter->tmreg_lock);
-		ts = timespec64_add(adapter->perout[0].start,
-				    adapter->perout[0].period);
-		/* u32 conversion of tv_sec is safe until y2106 */
-		wr32(E1000_TRGTTIML0, ts.tv_nsec);
-		wr32(E1000_TRGTTIMH0, (u32)ts.tv_sec);
-		tsauxc = rd32(E1000_TSAUXC);
-		tsauxc |= TSAUXC_EN_TT0;
-		wr32(E1000_TSAUXC, tsauxc);
-		adapter->perout[0].start = ts;
-		spin_unlock(&adapter->tmreg_lock);
+		igb_perout(adapter, 0);
 		ack |= TSINTR_TT0;
 	}
 
 	if (tsicr & TSINTR_TT1) {
-		spin_lock(&adapter->tmreg_lock);
-		ts = timespec64_add(adapter->perout[1].start,
-				    adapter->perout[1].period);
-		wr32(E1000_TRGTTIML1, ts.tv_nsec);
-		wr32(E1000_TRGTTIMH1, (u32)ts.tv_sec);
-		tsauxc = rd32(E1000_TSAUXC);
-		tsauxc |= TSAUXC_EN_TT1;
-		wr32(E1000_TSAUXC, tsauxc);
-		adapter->perout[1].start = ts;
-		spin_unlock(&adapter->tmreg_lock);
+		igb_perout(adapter, 1);
 		ack |= TSINTR_TT1;
 	}
 
 	if (tsicr & TSINTR_AUTT0) {
-		nsec = rd32(E1000_AUXSTMPL0);
-		sec  = rd32(E1000_AUXSTMPH0);
-		event.type = PTP_CLOCK_EXTTS;
-		event.index = 0;
-		event.timestamp = sec * 1000000000ULL + nsec;
-		ptp_clock_event(adapter->ptp_clock, &event);
+		igb_extts(adapter, 0);
 		ack |= TSINTR_AUTT0;
 	}
 
 	if (tsicr & TSINTR_AUTT1) {
-		nsec = rd32(E1000_AUXSTMPL1);
-		sec  = rd32(E1000_AUXSTMPH1);
-		event.type = PTP_CLOCK_EXTTS;
-		event.index = 1;
-		event.timestamp = sec * 1000000000ULL + nsec;
-		ptp_clock_event(adapter->ptp_clock, &event);
+		igb_extts(adapter, 1);
 		ack |= TSINTR_AUTT1;
 	}
 
-- 
2.30.2

[PATCH net-next 3/4] igb: support PEROUT on 82580/i354/i350

[Ruud Bos]

Support for the PEROUT PTP pin function on 82580/i354/i350 based adapters.
Because the time registers of these adapters do not have the nice split in
second rollovers as the i210 has, the implementation is slightly more
complex compared to the i210 implementation.

Signed-off-by: Ruud Bos <kernel.hbk@gmail.com>
---
 drivers/net/ethernet/intel/igb/igb_main.c |  54 +++++++++-
 drivers/net/ethernet/intel/igb/igb_ptp.c  | 122 +++++++++++++++++++++-
 2 files changed, 172 insertions(+), 4 deletions(-)

diff --git a/drivers/net/ethernet/intel/igb/igb_main.c b/drivers/net/ethernet/intel/igb/igb_main.c
index 1ff9bc452fcf..5f59c5de7033 100644
--- a/drivers/net/ethernet/intel/igb/igb_main.c
+++ b/drivers/net/ethernet/intel/igb/igb_main.c
@@ -6742,8 +6742,57 @@ static void igb_perout(struct igb_adapter *adapter, int sdp)
 		return;
 
 	spin_lock(&adapter->tmreg_lock);
-	ts = timespec64_add(adapter->perout[sdp].start,
-			    adapter->perout[sdp].period);
+
+	if ((hw->mac.type == e1000_82580) ||
+	    (hw->mac.type == e1000_i354) ||
+	    (hw->mac.type == e1000_i350)) {
+		u32 systiml, systimh, level_mask, level, rem;
+		u64 systim, now;
+		s64 ns = timespec64_to_ns(&adapter->perout[sdp].period);
+
+		/* 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(&adapter->tc, systim);
+
+		level_mask = (sdp == 1) ? 0x80000 : 0x40000;
+		level = (rd32(E1000_CTRL) & 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;
+				pr_notice("igb: periodic output on %s missed falling edge\n",
+					  adapter->sdp_config[sdp].name);
+			}
+		} else {
+			/* second half of period */
+			if (level == 1) {
+				/* output is already high, skip this period */
+				systim += ns;
+				pr_notice("igb: periodic output on %s missed rising edge\n",
+					  adapter->sdp_config[sdp].name);
+			}
+		}
+
+		/* for this chip family tv_sec is the upper part of the binary value,
+		 * so not seconds
+		 */
+		ts.tv_nsec = (u32)systim;
+		ts.tv_sec  = ((u32)(systim >> 32)) & 0xFF;
+	} else {
+		ts = timespec64_add(adapter->perout[sdp].start,
+				    adapter->perout[sdp].period);
+	}
+
 	/* u32 conversion of tv_sec is safe until y2106 */
 	wr32((sdp == 1) ? E1000_TRGTTIML1 : E1000_TRGTTIML0, ts.tv_nsec);
 	wr32((sdp == 1) ? E1000_TRGTTIMH1 : E1000_TRGTTIMH0, (u32)ts.tv_sec);
@@ -6751,6 +6800,7 @@ static void igb_perout(struct igb_adapter *adapter, int sdp)
 	tsauxc |= TSAUXC_EN_TT0;
 	wr32(E1000_TSAUXC, tsauxc);
 	adapter->perout[sdp].start = ts;
+
 	spin_unlock(&adapter->tmreg_lock);
 }
 
diff --git a/drivers/net/ethernet/intel/igb/igb_ptp.c b/drivers/net/ethernet/intel/igb/igb_ptp.c
index c78d0c2a5341..64a949bb5d8a 100644
--- a/drivers/net/ethernet/intel/igb/igb_ptp.c
+++ b/drivers/net/ethernet/intel/igb/igb_ptp.c
@@ -508,6 +508,119 @@ 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);
+	struct e1000_hw *hw = &igb->hw;
+	u32 tsauxc, tsim, tsauxc_mask, tsim_mask, trgttiml, trgttimh, systiml,
+		systimh, level_mask, level, rem;
+	unsigned long flags;
+	struct timespec64 ts, start;
+	int pin = -1;
+	s64 ns;
+	u64 systim, now;
+
+	switch (rq->type) {
+	case PTP_CLK_REQ_EXTTS:
+		return -EOPNOTSUPP;
+
+	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);
+
+			level_mask = (pin == 1) ? 0x80000 : 0x40000;
+	                level = (rd32(E1000_CTRL) & 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)
 {
@@ -1215,16 +1328,21 @@ 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;
-- 
2.30.2

[PATCH net-next 4/4] support EXTTS on 82580/i354/i350

[Ruud Bos]

Support for the EXTTS PTP pin function on 82580/i354/i350 based adapters.
Because the time registers of these adapters do not have the nice split in
second rollovers as the i210 has, the implementation is slightly more
complex compared to the i210 implementation.

Signed-off-by: Ruud Bos <kernel.hbk@gmail.com>
---
 drivers/net/ethernet/intel/igb/igb_main.c | 20 ++++++++++---
 drivers/net/ethernet/intel/igb/igb_ptp.c  | 36 ++++++++++++++++++++++-
 2 files changed, 51 insertions(+), 5 deletions(-)

diff --git a/drivers/net/ethernet/intel/igb/igb_main.c b/drivers/net/ethernet/intel/igb/igb_main.c
index 5f59c5de7033..30f16cacd972 100644
--- a/drivers/net/ethernet/intel/igb/igb_main.c
+++ b/drivers/net/ethernet/intel/igb/igb_main.c
@@ -6807,17 +6807,29 @@ static void igb_perout(struct igb_adapter *adapter, int sdp)
 static void igb_extts(struct igb_adapter *adapter, int sdp)
 {
 	struct e1000_hw *hw = &adapter->hw;
-	u32 sec, nsec;
+	int auxstmpl = (sdp == 1) ? E1000_AUXSTMPL1 : E1000_AUXSTMPL0;
+	int auxstmph = (sdp == 1) ? E1000_AUXSTMPH1 : E1000_AUXSTMPH0;
+	struct timespec64 ts;
 	struct ptp_clock_event event;
 
 	if (sdp < 0 || sdp >= IGB_N_EXTTS)
 		return;
 
-	nsec = rd32((sdp == 1) ? E1000_AUXSTMPL1 : E1000_AUXSTMPL0);
-	sec  = rd32((sdp == 1) ? E1000_AUXSTMPH1 : E1000_AUXSTMPH0);
+	if ((hw->mac.type == e1000_82580) ||
+	    (hw->mac.type == e1000_i354) ||
+	    (hw->mac.type == e1000_i350)) {
+		s64 ns = rd32(auxstmpl);
+
+		ns += ((s64)(rd32(auxstmph) & 0xFF)) << 32;
+		ts = ns_to_timespec64(ns);
+	} else {
+		ts.tv_nsec = rd32(auxstmpl);
+		ts.tv_sec  = rd32(auxstmph);
+	}
+
 	event.type = PTP_CLOCK_EXTTS;
 	event.index = sdp;
-	event.timestamp = sec * 1000000000ULL + nsec;
+	event.timestamp = ts.tv_sec * 1000000000ULL + ts.tv_nsec;
 	ptp_clock_event(adapter->ptp_clock, &event);
 }
 
diff --git a/drivers/net/ethernet/intel/igb/igb_ptp.c b/drivers/net/ethernet/intel/igb/igb_ptp.c
index 64a949bb5d8a..bc24295b6b52 100644
--- a/drivers/net/ethernet/intel/igb/igb_ptp.c
+++ b/drivers/net/ethernet/intel/igb/igb_ptp.c
@@ -524,7 +524,41 @@ static int igb_ptp_feature_enable_82580(struct ptp_clock_info *ptp,
 
 	switch (rq->type) {
 	case PTP_CLK_REQ_EXTTS:
-		return -EOPNOTSUPP;
+		/* 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 */
-- 
2.30.2

Re: [PATCH net-next 0/4] igb: support PEROUT and EXTTS PTP pin functions on 82580/i354/i350

[Ruud Bos]

Hi,

My apologies for the huge delay in resending this patch set.

I tried  setting up my corporate e-mail to work on Linux to be able to use 
git send-email and getting rid of the automatically appended 
confidentiality claim. Eventually I gave up on getting this sorted, hence 
the different e-mail address.

Anyway, I have re-spun the patch series atop net-next.
Feedback is welcome.

Regards,
Ruud

Re: [PATCH net-next 0/4] igb: support PEROUT and EXTTS PTP pin functions on 82580/i354/i350

[Ruud Bos]

On Wed, Oct 6, 2021 at 3:09 PM Ruud Bos <kernel.hbk@gmail.com> wrote:
>
> Hi,
>
> My apologies for the huge delay in resending this patch set.
>
> I tried  setting up my corporate e-mail to work on Linux to be able to use
> git send-email and getting rid of the automatically appended
> confidentiality claim. Eventually I gave up on getting this sorted, hence
> the different e-mail address.
>
> Anyway, I have re-spun the patch series atop net-next.
> Feedback is welcome.
>
> Regards,
> Ruud

Ping?
I did not receive any response to my patches yet.
Does that mean I did something wrong?

Regards,
Ruud

Re: [PATCH net-next 0/4] igb: support PEROUT and EXTTS PTP pin functions on 82580/i354/i350

[Jakub Kicinski]

On Tue, 12 Oct 2021 17:43:52 +0200 Ruud Bos wrote:
> On Wed, Oct 6, 2021 at 3:09 PM Ruud Bos <kernel.hbk@gmail.com> wrote:
> > My apologies for the huge delay in resending this patch set.
> >
> > I tried  setting up my corporate e-mail to work on Linux to be able to use
> > git send-email and getting rid of the automatically appended
> > confidentiality claim. Eventually I gave up on getting this sorted, hence
> > the different e-mail address.
> >
> > Anyway, I have re-spun the patch series atop net-next.
> > Feedback is welcome.
>
> Ping?
> I did not receive any response to my patches yet.
> Does that mean I did something wrong?

These are supposed to go via Intel's trees. 
Let's point To: at Intel's maintainers.

Re: [PATCH net-next 0/4] igb: support PEROUT and EXTTS PTP pin functions on 82580/i354/i350

[Nguyen, Anthony L]

On Tue, 2021-10-12 at 08:49 -0700, Jakub Kicinski wrote:
> On Tue, 12 Oct 2021 17:43:52 +0200 Ruud Bos wrote:
> > On Wed, Oct 6, 2021 at 3:09 PM Ruud Bos <kernel.hbk@gmail.com>
> > wrote:
> > > My apologies for the huge delay in resending this patch set.
> > > 
> > > I tried  setting up my corporate e-mail to work on Linux to be
> > > able to use
> > > git send-email and getting rid of the automatically appended
> > > confidentiality claim. Eventually I gave up on getting this
> > > sorted, hence
> > > the different e-mail address.
> > > 
> > > Anyway, I have re-spun the patch series atop net-next.
> > > Feedback is welcome.
> > 
> > Ping?
> > I did not receive any response to my patches yet.
> > Does that mean I did something wrong?
> 
> These are supposed to go via Intel's trees. 
> Let's point To: at Intel's maintainers.

Sorry, I must have missed this. Could you resend and add
intel-wired-lan@lists.osuosl.org so that it can be reviewed there and
picked up by the Intel tree's patchworks?

Thanks,
Tony

[PATCH net-next 0/4] igb: support PEROUT and EXTTS PTP pin functions on 82580/i354/i350

[Ruud Bos]

The igb driver provides support for PEROUT and EXTTS pin functions that
allow adapter external use of timing signals. At Hottinger Bruel & Kjaer we
are using the PEROUT function to feed a PTP corrected 1pps signal into an
FPGA as cross system synchronized time source.

Support for the PEROUT and EXTTS SDP functions is currently limited to
i210/i211 based adapters. This patch series enables these functions also
for 82580/i354/i350 based ones. Because the time registers of these
adapters do not have the nice split in second rollovers as the i210 has,
the implementation is slightly more complex compared to the i210
implementation.

The PEROUT function has been successfully tested on an i350 based ethernet
adapter. Using the following user space code excerpt, the driver outputs a
PTP corrected 1pps signal on the SDP0 pin of an i350:

    struct ptp_pin_desc desc;
    memset(&desc, 0, sizeof(desc));
    desc.index = 0;
    desc.func = PTP_PF_PEROUT;
    desc.chan = 0;
    if (ioctl(fd, PTP_PIN_SETFUNC, &desc) == 0) {
        struct timespec ts;
        if (clock_gettime(clkid, &ts) == 0) {
            struct ptp_perout_request rq;
            memset(&rq, 0, sizeof(rq));
            rq.index = 0;
            rq.start.sec = ts.tv_sec + 1;
            rq.start.nsec = 500000000;
            rq.period.sec  = 1;
            rq.period.nsec = 0;
            if (ioctl(fd, PTP_PEROUT_REQUEST, &rq) == 0) {
                /* 1pps signal is now available on SDP0 */
            }
        }
    }

The added EXTTS function has not been tested. However, looking at the data
sheets, the layout of the registers involved match the i210 exactly except
for the time registers mentioned before. Hence the almost identical
implementation.

Ruud Bos (4):
  igb: move SDP config initialization to separate function
  igb: move PEROUT and EXTTS isr logic to separate functions
  igb: support PEROUT on 82580/i354/i350
  igb: support EXTTS on 82580/i354/i350

 drivers/net/ethernet/intel/igb/igb_main.c | 141 ++++++++++++-----
 drivers/net/ethernet/intel/igb/igb_ptp.c  | 183 ++++++++++++++++++++--
 2 files changed, 279 insertions(+), 45 deletions(-)

--
2.30.2


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Re: [PATCH net-next 0/4] igb: support PEROUT and EXTTS PTP pin functions on 82580/i354/i350

[Jakub Kicinski]

On Mon, 19 Jul 2021 06:25:36 +0000, Ruud Bos wrote:
> The igb driver provides support for PEROUT and EXTTS pin functions that
> allow adapter external use of timing signals. At Hottinger Bruel & Kjaer we
> are using the PEROUT function to feed a PTP corrected 1pps signal into an
> FPGA as cross system synchronized time source.

Please resend and CC appropriate maintainers.
scripts/get_maintainers.pl should help.