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Date: Tue, 31 Mar 2015 21:08:10 +0000
From: "Keller, Jacob E" <jacob.e.keller@...el.com>
To: "richardcochran@...il.com" <richardcochran@...il.com>
CC: "thomas.lendacky@....com" <thomas.lendacky@....com>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
"baolin.wang@...aro.org" <baolin.wang@...aro.org>,
"b45643@...escale.com" <b45643@...escale.com>,
"sshah@...arflare.com" <sshah@...arflare.com>,
"amirv@...lanox.com" <amirv@...lanox.com>,
"ben@...adent.org.uk" <ben@...adent.org.uk>,
"sonic.zhang@...log.com" <sonic.zhang@...log.com>,
"peppe.cavallaro@...com" <peppe.cavallaro@...com>,
"Allan, Bruce W" <bruce.w.allan@...el.com>,
"rayagond@...avyalabs.com" <rayagond@...avyalabs.com>,
"tglx@...utronix.de" <tglx@...utronix.de>,
"ariel.elior@...gic.com" <ariel.elior@...gic.com>,
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"Vick, Matthew" <matthew.vick@...el.com>,
"linux-net-drivers@...arflare.com" <linux-net-drivers@...arflare.com>,
"arnd@...aro.org" <arnd@...aro.org>,
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"prashant@...adcom.com" <prashant@...adcom.com>,
"davem@...emloft.net" <davem@...emloft.net>,
"Kirsher, Jeffrey T" <jeffrey.t.kirsher@...el.com>,
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"john.stultz@...aro.org" <john.stultz@...aro.org>
Subject: Re: [PATCH net-next V3 13/23] ptp: igb: convert to the 64 bit
get/set time methods.
On Sun, 2015-03-29 at 23:12 +0200, Richard Cochran wrote:
> For the 82576, the driver's clock is implemented using a timecounter,
> and so with this patch that device is ready for the year 2038.
>
> However, in the case of the i210, the device stores the number of
> seconds in a 32 bit register. Therefore, more work is needed on this
> driver before the year 2038 comes around.
>
> Compile tested only.
I assume we would want to use a time counter wrapper here to resolve
this issue?
Regards,
Jake
>
> Signed-off-by: Richard Cochran <richardcochran@...il.com>
> Acked-by: Jeff Kirsher <jeffrey.t.kirsher@...el.com>
> ---
> drivers/net/ethernet/intel/igb/igb_ptp.c | 41 +++++++++++++++---------------
> 1 file changed, 21 insertions(+), 20 deletions(-)
>
> diff --git a/drivers/net/ethernet/intel/igb/igb_ptp.c b/drivers/net/ethernet/intel/igb/igb_ptp.c
> index 52d01b8..0348b7e 100644
> --- a/drivers/net/ethernet/intel/igb/igb_ptp.c
> +++ b/drivers/net/ethernet/intel/igb/igb_ptp.c
> @@ -116,7 +116,8 @@ static cycle_t igb_ptp_read_82580(const struct cyclecounter *cc)
> }
>
> /* SYSTIM read access for I210/I211 */
> -static void igb_ptp_read_i210(struct igb_adapter *adapter, struct timespec *ts)
> +static void igb_ptp_read_i210(struct igb_adapter *adapter,
> + struct timespec64 *ts)
> {
> struct e1000_hw *hw = &adapter->hw;
> u32 sec, nsec;
> @@ -134,7 +135,7 @@ static void igb_ptp_read_i210(struct igb_adapter *adapter, struct timespec *ts)
> }
>
> static void igb_ptp_write_i210(struct igb_adapter *adapter,
> - const struct timespec *ts)
> + const struct timespec64 *ts)
> {
> struct e1000_hw *hw = &adapter->hw;
>
> @@ -269,13 +270,13 @@ static int igb_ptp_adjtime_i210(struct ptp_clock_info *ptp, s64 delta)
> struct igb_adapter *igb = container_of(ptp, struct igb_adapter,
> ptp_caps);
> unsigned long flags;
> - struct timespec now, then = ns_to_timespec(delta);
> + struct timespec64 now, then = ns_to_timespec64(delta);
>
> spin_lock_irqsave(&igb->tmreg_lock, flags);
>
> igb_ptp_read_i210(igb, &now);
> - now = timespec_add(now, then);
> - igb_ptp_write_i210(igb, (const struct timespec *)&now);
> + now = timespec64_add(now, then);
> + igb_ptp_write_i210(igb, (const struct timespec64 *)&now);
>
> spin_unlock_irqrestore(&igb->tmreg_lock, flags);
>
> @@ -283,7 +284,7 @@ static int igb_ptp_adjtime_i210(struct ptp_clock_info *ptp, s64 delta)
> }
>
> static int igb_ptp_gettime_82576(struct ptp_clock_info *ptp,
> - struct timespec *ts)
> + struct timespec64 *ts)
> {
> struct igb_adapter *igb = container_of(ptp, struct igb_adapter,
> ptp_caps);
> @@ -304,7 +305,7 @@ static int igb_ptp_gettime_82576(struct ptp_clock_info *ptp,
> }
>
> static int igb_ptp_gettime_i210(struct ptp_clock_info *ptp,
> - struct timespec *ts)
> + struct timespec64 *ts)
> {
> struct igb_adapter *igb = container_of(ptp, struct igb_adapter,
> ptp_caps);
> @@ -320,7 +321,7 @@ static int igb_ptp_gettime_i210(struct ptp_clock_info *ptp,
> }
>
> static int igb_ptp_settime_82576(struct ptp_clock_info *ptp,
> - const struct timespec *ts)
> + const struct timespec64 *ts)
> {
> struct igb_adapter *igb = container_of(ptp, struct igb_adapter,
> ptp_caps);
> @@ -340,7 +341,7 @@ static int igb_ptp_settime_82576(struct ptp_clock_info *ptp,
> }
>
> static int igb_ptp_settime_i210(struct ptp_clock_info *ptp,
> - const struct timespec *ts)
> + const struct timespec64 *ts)
> {
> struct igb_adapter *igb = container_of(ptp, struct igb_adapter,
> ptp_caps);
> @@ -627,11 +628,11 @@ 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 timespec ts;
> + struct timespec64 ts;
>
> - igb->ptp_caps.gettime(&igb->ptp_caps, &ts);
> + igb->ptp_caps.gettime64(&igb->ptp_caps, &ts);
>
> - pr_debug("igb overflow check at %ld.%09lu\n", ts.tv_sec, ts.tv_nsec);
> + pr_debug("igb overflow check at %lld.%09lu\n", ts.tv_sec, ts.tv_nsec);
>
> schedule_delayed_work(&igb->ptp_overflow_work,
> IGB_SYSTIM_OVERFLOW_PERIOD);
> @@ -989,8 +990,8 @@ 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.gettime = igb_ptp_gettime_82576;
> - adapter->ptp_caps.settime = igb_ptp_settime_82576;
> + adapter->ptp_caps.gettime64 = igb_ptp_gettime_82576;
> + adapter->ptp_caps.settime64 = igb_ptp_settime_82576;
> adapter->ptp_caps.enable = igb_ptp_feature_enable;
> adapter->cc.read = igb_ptp_read_82576;
> adapter->cc.mask = CYCLECOUNTER_MASK(64);
> @@ -1009,8 +1010,8 @@ void igb_ptp_init(struct igb_adapter *adapter)
> adapter->ptp_caps.pps = 0;
> adapter->ptp_caps.adjfreq = igb_ptp_adjfreq_82580;
> adapter->ptp_caps.adjtime = igb_ptp_adjtime_82576;
> - adapter->ptp_caps.gettime = igb_ptp_gettime_82576;
> - adapter->ptp_caps.settime = igb_ptp_settime_82576;
> + adapter->ptp_caps.gettime64 = igb_ptp_gettime_82576;
> + adapter->ptp_caps.settime64 = igb_ptp_settime_82576;
> adapter->ptp_caps.enable = igb_ptp_feature_enable;
> adapter->cc.read = igb_ptp_read_82580;
> adapter->cc.mask = CYCLECOUNTER_MASK(IGB_NBITS_82580);
> @@ -1038,8 +1039,8 @@ void igb_ptp_init(struct igb_adapter *adapter)
> adapter->ptp_caps.pin_config = adapter->sdp_config;
> adapter->ptp_caps.adjfreq = igb_ptp_adjfreq_82580;
> adapter->ptp_caps.adjtime = igb_ptp_adjtime_i210;
> - adapter->ptp_caps.gettime = igb_ptp_gettime_i210;
> - adapter->ptp_caps.settime = igb_ptp_settime_i210;
> + adapter->ptp_caps.gettime64 = igb_ptp_gettime_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;
> /* Enable the timer functions by clearing bit 31. */
> @@ -1057,7 +1058,7 @@ void igb_ptp_init(struct igb_adapter *adapter)
>
> /* Initialize the clock and overflow work for devices that need it. */
> if ((hw->mac.type == e1000_i210) || (hw->mac.type == e1000_i211)) {
> - struct timespec ts = ktime_to_timespec(ktime_get_real());
> + struct timespec64 ts = ktime_to_timespec64(ktime_get_real());
>
> igb_ptp_settime_i210(&adapter->ptp_caps, &ts);
> } else {
> @@ -1171,7 +1172,7 @@ void igb_ptp_reset(struct igb_adapter *adapter)
>
> /* Re-initialize the timer. */
> if ((hw->mac.type == e1000_i210) || (hw->mac.type == e1000_i211)) {
> - struct timespec ts = ktime_to_timespec(ktime_get_real());
> + struct timespec64 ts = ktime_to_timespec64(ktime_get_real());
>
> igb_ptp_write_i210(adapter, &ts);
> } else {
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