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

* [PATCH net-next 4/4] igb: support EXTTS on 82580/i354/i350
@ 2021-07-19  6:25 Ruud Bos
  0 siblings, 0 replies; 2+ messages in thread
From: Ruud Bos @ 2021-07-19  6:25 UTC (permalink / raw)
  To: netdev

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 <ruud.bos@hbkworld.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 8d87166e5ecb..3f76b45d7e65 100644
--- a/drivers/net/ethernet/intel/igb/igb_main.c
+++ b/drivers/net/ethernet/intel/igb/igb_main.c
@@ -6796,17 +6796,29 @@ 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


UNRESTRICTED
HBK Benelux B.V., Schutweg 15a, NL-5145 NP Waalwijk, The Netherlands www.hbkworld.com Registered as B.V. (Dutch limited liability company) in the Dutch commercial register 08183075 0000 Company domiciled in Waalwijk Managing Directors : Alexandra Hellemans, Jens Wiegand, Jorn Bagijn The information in this email is confidential. It is intended solely for the addressee. If you are not the intended recipient, please let me know and delete this email.

^ permalink raw reply related	[flat|nested] 2+ messages in thread