[PATCH net-next 7/8] ixgbe: extend PTP gettime function to read system clock
From: Miroslav Lichvar <hidden>
Date: 2018-11-09 19:54:57
Subsystem:
intel ethernet drivers, networking drivers, the rest · Maintainers:
Tony Nguyen, Przemek Kitszel, Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
This adds support for the PTP_SYS_OFFSET_EXTENDED ioctl. Cc: Richard Cochran <richardcochran@gmail.com> Cc: Jacob Keller <jacob.e.keller@intel.com> Cc: Jeff Kirsher <redacted> Signed-off-by: Miroslav Lichvar <redacted> --- drivers/net/ethernet/intel/ixgbe/ixgbe_ptp.c | 54 ++++++++++++++++---- 1 file changed, 44 insertions(+), 10 deletions(-)
diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_ptp.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_ptp.c
index b3e0d8bb5cbd..d81a50dc9535 100644
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_ptp.c
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_ptp.c@@ -443,22 +443,52 @@ static int ixgbe_ptp_adjtime(struct ptp_clock_info *ptp, s64 delta) } /** - * ixgbe_ptp_gettime + * ixgbe_ptp_gettimex * @ptp: the ptp clock structure - * @ts: timespec structure to hold the current time value + * @ts: timespec to hold the PHC timestamp + * @sts: structure to hold the system time before and after reading the PHC * * read the timecounter and return the correct value on ns, * after converting it into a struct timespec. */ -static int ixgbe_ptp_gettime(struct ptp_clock_info *ptp, struct timespec64 *ts) +static int ixgbe_ptp_gettimex(struct ptp_clock_info *ptp, + struct timespec64 *ts, + struct ptp_system_timestamp *sts) { struct ixgbe_adapter *adapter = container_of(ptp, struct ixgbe_adapter, ptp_caps); + struct ixgbe_hw *hw = &adapter->hw; unsigned long flags; - u64 ns; + u64 ns, stamp; spin_lock_irqsave(&adapter->tmreg_lock, flags); - ns = timecounter_read(&adapter->hw_tc); + + switch (adapter->hw.mac.type) { + case ixgbe_mac_X550: + case ixgbe_mac_X550EM_x: + case ixgbe_mac_x550em_a: + /* Upper 32 bits represent billions of cycles, lower 32 bits + * represent cycles. However, we use timespec64_to_ns for the + * correct math even though the units haven't been corrected + * yet. + */ + ptp_read_system_prets(sts); + IXGBE_READ_REG(hw, IXGBE_SYSTIMR); + ptp_read_system_postts(sts); + ts->tv_nsec = IXGBE_READ_REG(hw, IXGBE_SYSTIML); + ts->tv_sec = IXGBE_READ_REG(hw, IXGBE_SYSTIMH); + stamp = timespec64_to_ns(ts); + break; + default: + ptp_read_system_prets(sts); + stamp = IXGBE_READ_REG(hw, IXGBE_SYSTIML); + ptp_read_system_postts(sts); + stamp |= (u64)IXGBE_READ_REG(hw, IXGBE_SYSTIMH) << 32; + break; + } + + ns = timecounter_cyc2time(&adapter->hw_tc, stamp); + spin_unlock_irqrestore(&adapter->tmreg_lock, flags); *ts = ns_to_timespec64(ns);
@@ -567,10 +597,14 @@ void ixgbe_ptp_overflow_check(struct ixgbe_adapter *adapter) { bool timeout = time_is_before_jiffies(adapter->last_overflow_check + IXGBE_OVERFLOW_PERIOD); - struct timespec64 ts; + unsigned long flags; if (timeout) { - ixgbe_ptp_gettime(&adapter->ptp_caps, &ts); + /* Update the timecounter */ + spin_lock_irqsave(&adapter->tmreg_lock, flags); + timecounter_read(&adapter->hw_tc); + spin_unlock_irqrestore(&adapter->tmreg_lock, flags); + adapter->last_overflow_check = jiffies; } }
@@ -1216,7 +1250,7 @@ static long ixgbe_ptp_create_clock(struct ixgbe_adapter *adapter) adapter->ptp_caps.pps = 1; adapter->ptp_caps.adjfreq = ixgbe_ptp_adjfreq_82599; adapter->ptp_caps.adjtime = ixgbe_ptp_adjtime; - adapter->ptp_caps.gettime64 = ixgbe_ptp_gettime; + adapter->ptp_caps.gettimex64 = ixgbe_ptp_gettimex; adapter->ptp_caps.settime64 = ixgbe_ptp_settime; adapter->ptp_caps.enable = ixgbe_ptp_feature_enable; adapter->ptp_setup_sdp = ixgbe_ptp_setup_sdp_x540;
@@ -1233,7 +1267,7 @@ static long ixgbe_ptp_create_clock(struct ixgbe_adapter *adapter) adapter->ptp_caps.pps = 0; adapter->ptp_caps.adjfreq = ixgbe_ptp_adjfreq_82599; adapter->ptp_caps.adjtime = ixgbe_ptp_adjtime; - adapter->ptp_caps.gettime64 = ixgbe_ptp_gettime; + adapter->ptp_caps.gettimex64 = ixgbe_ptp_gettimex; adapter->ptp_caps.settime64 = ixgbe_ptp_settime; adapter->ptp_caps.enable = ixgbe_ptp_feature_enable; break;
@@ -1249,7 +1283,7 @@ static long ixgbe_ptp_create_clock(struct ixgbe_adapter *adapter) adapter->ptp_caps.pps = 0; adapter->ptp_caps.adjfreq = ixgbe_ptp_adjfreq_X550; adapter->ptp_caps.adjtime = ixgbe_ptp_adjtime; - adapter->ptp_caps.gettime64 = ixgbe_ptp_gettime; + adapter->ptp_caps.gettimex64 = ixgbe_ptp_gettimex; adapter->ptp_caps.settime64 = ixgbe_ptp_settime; adapter->ptp_caps.enable = ixgbe_ptp_feature_enable; adapter->ptp_setup_sdp = NULL;
--
2.17.2