diff options
| 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/e1000e/defines.h | |
| 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/e1000e/defines.h')
| -rw-r--r-- | drivers/net/ethernet/intel/e1000e/defines.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/net/ethernet/intel/e1000e/defines.h b/drivers/net/ethernet/intel/e1000e/defines.h index f7c7804d79e5..0641c0098738 100644 --- a/drivers/net/ethernet/intel/e1000e/defines.h +++ b/drivers/net/ethernet/intel/e1000e/defines.h @@ -528,6 +528,11 @@ #define E1000_RXCW_C 0x20000000 /* Receive config */ #define E1000_RXCW_SYNCH 0x40000000 /* Receive config synch */ +/* HH Time Sync */ +#define E1000_TSYNCTXCTL_MAX_ALLOWED_DLY_MASK 0x0000F000 /* max delay */ +#define E1000_TSYNCTXCTL_SYNC_COMP 0x40000000 /* sync complete */ +#define E1000_TSYNCTXCTL_START_SYNC 0x80000000 /* initiate sync */ + #define E1000_TSYNCTXCTL_VALID 0x00000001 /* Tx timestamp valid */ #define E1000_TSYNCTXCTL_ENABLED 0x00000010 /* enable Tx timestamping */ |