Re: [PATCH v8 8/8] net: e1000e: Adds hardware supported cross timestamp on e1000e nic
From: Jeff Kirsher <hidden>
Date: 2016-02-24 20:22:46
Also in:
intel-wired-lan, lkml
On Mon, 2016-02-22 at 03:15 -0800, Christopher S. Hall wrote:
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(). Signed-off-by: Christopher S. Hall <redacted> [jstultz: Reworked to use new interface, commit message tweaks] Signed-off-by: John Stultz <redacted> --- drivers/net/ethernet/intel/Kconfig | 9 +++ drivers/net/ethernet/intel/e1000e/defines.h | 5 ++ drivers/net/ethernet/intel/e1000e/ptp.c | 85 +++++++++++++++++++++++++++++ drivers/net/ethernet/intel/e1000e/regs.h | 4 ++ 4 files changed, 103 insertions(+)
Acked-by: Jeff Kirsher <redacted>
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