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ixgbe: extend PTP gettime function to read system clock

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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 <jeffrey.t.kirsher@intel.com>
Signed-off-by: Miroslav Lichvar <mlichvar@redhat.com>
Acked-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Miroslav Lichvar 2018-11-09 11:14:48 +01:00 committed by David S. Miller
parent cff8ba28db
commit 018ed23ddc
1 changed files with 44 additions and 10 deletions
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54
drivers/net/ethernet/intel/ixgbe/ixgbe_ptp.c
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@ -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;