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| author |   Christopher S. Hall <christopher.s.hall@intel.com> | 2016-02-22 03:15:26 -0800 |
|---|---|---|
| committer |   John Stultz <john.stultz@linaro.org> | 2016-03-03 14:28:46 -0800 |
| commit | 01d7ada57ee9c735bd71fbe44ec0bcb70847afd4 (patch) | |
| tree | ee2a3cf1a7d13d36dc87b5eaa736a3652b4f47b0 /drivers/net/ethernet/intel/Kconfig | |
| parent | ptp: Add PTP_SYS_OFFSET_PRECISE for driver crosstimestamping (diff) | |
| download | linux-dev-01d7ada57ee9c735bd71fbe44ec0bcb70847afd4.tar.xz linux-dev-01d7ada57ee9c735bd71fbe44ec0bcb70847afd4.zip | |
e1000e: Adds hardware supported cross timestamp on e1000e nic
Modern Intel systems supports cross timestamping of the network device
clock and Always Running Timer (ART) in hardware. This allows the
device time and system time to be precisely correlated. The timestamp
pair is returned through e1000e_phc_get_syncdevicetime() used by
get_system_device_crosststamp(). The hardware cross-timestamp result
is made available to applications through the PTP_SYS_OFFSET_PRECISE
ioctl which calls e1000e_phc_getcrosststamp().
Cc: Prarit Bhargava <prarit@redhat.com>
Cc: Richard Cochran <richardcochran@gmail.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Cc: kevin.b.stanton@intel.com
Cc: kevin.j.clarke@intel.com
Cc: hpa@zytor.com
Cc: jeffrey.t.kirsher@intel.com
Cc: netdev@vger.kernel.org
Acked-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: Christopher S. Hall <christopher.s.hall@intel.com>
[jstultz: Reworked to use new interface, commit message tweaks]
Signed-off-by: John Stultz <john.stultz@linaro.org>
Diffstat (limited to 'drivers/net/ethernet/intel/Kconfig')
| -rw-r--r-- | drivers/net/ethernet/intel/Kconfig | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/net/ethernet/intel/Kconfig b/drivers/net/ethernet/intel/Kconfig index fa593dd3efe1..3772f3ac956e 100644 --- a/drivers/net/ethernet/intel/Kconfig +++ b/drivers/net/ethernet/intel/Kconfig @@ -83,6 +83,15 @@ config E1000E To compile this driver as a module, choose M here. The module will be called e1000e. +config E1000E_HWTS + bool "Support HW cross-timestamp on PCH devices" + default y + depends on E1000E && X86 + ---help--- + Say Y to enable hardware supported cross-timestamping on PCH + devices. The cross-timestamp is available through the PTP clock + driver precise cross-timestamp ioctl (PTP_SYS_OFFSET_PRECISE). + config IGB tristate "Intel(R) 82575/82576 PCI-Express Gigabit Ethernet support" depends on PCI |