From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jacob Keller Date: Thu, 1 Jul 2021 15:04:43 -0700 Subject: [Intel-wired-lan] [net-next v2 00/13] ice: implement support for PTP on E822 hardware Message-ID: <20210701220456.3882767-1-jacob.e.keller@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: intel-wired-lan@osuosl.org List-ID: Extend the ice driver implementation to support PTP for the E822 based devices. This includes a few cleanup patches, that fix some minor issues spotted while preparing them. In addition, there are some slight refactors to ease the addition of E822 support, followed by adding the new hardware implementation ice_ptp_hw.c. There are a few major differences with E822 support compared to E810 support: *) The E822 PHY is a bit different and requires a more complex initialization procedure that requires delaying the PHY start until link is up *) The E822 device has a Clock Generation Unit which must be initialized in order to generate proper clock frequencies on the output that drives the PTP hardware clock registers *) The E822 devices support enhanced timestamp calibration by making use of a process called Vernier offset measurement. This allows the hardware to measure phase offset related to the PHY clocks for Serdes and FEC, reducing the inaccuracy of the timestamp relative to the actual packet transmission. Making use of this requires programming the PHY to enable vernier calibration and then detecting when the PHY has completed calibration. This is done as part of a new kthread, ov_work. *) E822 devices support crosstimestamping via PCIe PTM, which we enable when available on the platform. There is a fair amount of logic required to perform PHY and CGU initialization, which is the vast majority of the new code, but it is fairly self contained within ice_ptp_hw.c, with the exception of monitoring for offset validity being handled by a kthread. Changes since v1: * Rebased on top of IWL to resolve conflict * Fixed build against non-X86 arch for the PCIe PTM support Jacob Keller (13): ice: fix Tx queue iteration for Tx timestamp enablement ice: remove dead code for allocating pin_config ice: add lock around Tx timestamp tracker flush ice: restart periodic outputs around time changes ice: introduce ice_base_incval function ice: PTP: move setting of tstamp_config ice: use 'int err' instead of 'int status' ice: introduce ice_ptp_init_phc function ice: convert clk_freq capability into time_ref ice: implement basic E822 PTP support ice: ensure the hardware Clock Generation Unit is configured ice: exit bypass mode once hardware finishes timestamp calibration ice: support crosstimestamping on E822 devices if supported drivers/net/ethernet/intel/Kconfig | 10 + drivers/net/ethernet/intel/ice/ice_cgu_regs.h | 116 + drivers/net/ethernet/intel/ice/ice_common.c | 12 + .../net/ethernet/intel/ice/ice_hw_autogen.h | 9 + drivers/net/ethernet/intel/ice/ice_main.c | 7 + drivers/net/ethernet/intel/ice/ice_ptp.c | 698 +++- drivers/net/ethernet/intel/ice/ice_ptp.h | 30 +- .../net/ethernet/intel/ice/ice_ptp_consts.h | 374 +++ drivers/net/ethernet/intel/ice/ice_ptp_hw.c | 2794 ++++++++++++++++- drivers/net/ethernet/intel/ice/ice_ptp_hw.h | 345 ++ drivers/net/ethernet/intel/ice/ice_type.h | 23 +- 11 files changed, 4207 insertions(+), 211 deletions(-) create mode 100644 drivers/net/ethernet/intel/ice/ice_cgu_regs.h create mode 100644 drivers/net/ethernet/intel/ice/ice_ptp_consts.h base-commit: 6e3c27180bcf2635f537ff63164e8df9773b56fb -- 2.31.1.331.gb0c09ab8796f