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igb: 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 11:14:47 +01:00 committed by David S. Miller
parent 98942d7053
commit cff8ba28db
1 changed files with 55 additions and 10 deletions
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65
drivers/net/ethernet/intel/igb/igb_ptp.c
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@ -275,17 +275,25 @@ static int igb_ptp_adjtime_i210(struct ptp_clock_info *ptp, s64 delta)
return 0;
}
static int igb_ptp_gettime_82576(struct ptp_clock_info *ptp,
struct timespec64 *ts)
static int igb_ptp_gettimex_82576(struct ptp_clock_info *ptp,
struct timespec64 *ts,
struct ptp_system_timestamp *sts)
{
struct igb_adapter *igb = container_of(ptp, struct igb_adapter,
ptp_caps);
struct e1000_hw *hw = &igb->hw;
unsigned long flags;
u32 lo, hi;
u64 ns;
spin_lock_irqsave(&igb->tmreg_lock, flags);
ns = timecounter_read(&igb->tc);
ptp_read_system_prets(sts);
lo = rd32(E1000_SYSTIML);
ptp_read_system_postts(sts);
hi = rd32(E1000_SYSTIMH);
ns = timecounter_cyc2time(&igb->tc, ((u64)hi << 32) | lo);
spin_unlock_irqrestore(&igb->tmreg_lock, flags);
@ -294,16 +302,50 @@ static int igb_ptp_gettime_82576(struct ptp_clock_info *ptp,
return 0;
}
static int igb_ptp_gettime_i210(struct ptp_clock_info *ptp,
struct timespec64 *ts)
static int igb_ptp_gettimex_82580(struct ptp_clock_info *ptp,
struct timespec64 *ts,
struct ptp_system_timestamp *sts)
{
struct igb_adapter *igb = container_of(ptp, struct igb_adapter,
ptp_caps);
struct e1000_hw *hw = &igb->hw;
unsigned long flags;
u32 lo, hi;
u64 ns;
spin_lock_irqsave(&igb->tmreg_lock, flags);
ptp_read_system_prets(sts);
rd32(E1000_SYSTIMR);
ptp_read_system_postts(sts);
lo = rd32(E1000_SYSTIML);
hi = rd32(E1000_SYSTIMH);
ns = timecounter_cyc2time(&igb->tc, ((u64)hi << 32) | lo);
spin_unlock_irqrestore(&igb->tmreg_lock, flags);
*ts = ns_to_timespec64(ns);
return 0;
}
static int igb_ptp_gettimex_i210(struct ptp_clock_info *ptp,
struct timespec64 *ts,
struct ptp_system_timestamp *sts)
{
struct igb_adapter *igb = container_of(ptp, struct igb_adapter,
ptp_caps);
struct e1000_hw *hw = &igb->hw;
unsigned long flags;
spin_lock_irqsave(&igb->tmreg_lock, flags);
igb_ptp_read_i210(igb, ts);
ptp_read_system_prets(sts);
rd32(E1000_SYSTIMR);
ptp_read_system_postts(sts);
ts->tv_nsec = rd32(E1000_SYSTIML);
ts->tv_sec = rd32(E1000_SYSTIMH);
spin_unlock_irqrestore(&igb->tmreg_lock, flags);
@ -656,9 +698,12 @@ static void igb_ptp_overflow_check(struct work_struct *work)
struct igb_adapter *igb =
container_of(work, struct igb_adapter, ptp_overflow_work.work);
struct timespec64 ts;
u64 ns;
igb->ptp_caps.gettime64(&igb->ptp_caps, &ts);
/* Update the timecounter */
ns = timecounter_read(&igb->tc);
ts = ns_to_timespec64(ns);
pr_debug("igb overflow check at %lld.%09lu\n",
(long long) ts.tv_sec, ts.tv_nsec);
@ -1124,7 +1169,7 @@ void igb_ptp_init(struct igb_adapter *adapter)
adapter->ptp_caps.pps = 0;
adapter->ptp_caps.adjfreq = igb_ptp_adjfreq_82576;
adapter->ptp_caps.adjtime = igb_ptp_adjtime_82576;
adapter->ptp_caps.gettime64 = igb_ptp_gettime_82576;
adapter->ptp_caps.gettimex64 = igb_ptp_gettimex_82576;
adapter->ptp_caps.settime64 = igb_ptp_settime_82576;
adapter->ptp_caps.enable = igb_ptp_feature_enable;
adapter->cc.read = igb_ptp_read_82576;
@ -1143,7 +1188,7 @@ void igb_ptp_init(struct igb_adapter *adapter)
adapter->ptp_caps.pps = 0;
adapter->ptp_caps.adjfine = igb_ptp_adjfine_82580;
adapter->ptp_caps.adjtime = igb_ptp_adjtime_82576;
adapter->ptp_caps.gettime64 = igb_ptp_gettime_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->cc.read = igb_ptp_read_82580;
@ -1171,7 +1216,7 @@ void igb_ptp_init(struct igb_adapter *adapter)
adapter->ptp_caps.pin_config = adapter->sdp_config;
adapter->ptp_caps.adjfine = igb_ptp_adjfine_82580;
adapter->ptp_caps.adjtime = igb_ptp_adjtime_i210;
adapter->ptp_caps.gettime64 = igb_ptp_gettime_i210;
adapter->ptp_caps.gettimex64 = igb_ptp_gettimex_i210;
adapter->ptp_caps.settime64 = igb_ptp_settime_i210;
adapter->ptp_caps.enable = igb_ptp_feature_enable_i210;
adapter->ptp_caps.verify = igb_ptp_verify_pin;