Message-ID: <20250614000754.164827-1-hramamurthy@google.com>
Date: Sat, 14 Jun 2025 00:07:46 +0000
From: Harshitha Ramamurthy <hramamurthy@...gle.com>
To: netdev@...r.kernel.org
Cc: davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org, 
	pabeni@...hat.com, jeroendb@...gle.com, hramamurthy@...gle.com, 
	andrew+netdev@...n.ch, willemb@...gle.com, ziweixiao@...gle.com, 
	pkaligineedi@...gle.com, yyd@...gle.com, joshwash@...gle.com, 
	shailend@...gle.com, linux@...blig.org, thostet@...gle.com, 
	jfraker@...gle.com, richardcochran@...il.com, jdamato@...tly.com, 
	vadim.fedorenko@...ux.dev, horms@...nel.org, linux-kernel@...r.kernel.org
Subject: [PATCH net-next v5 0/8] gve: Add Rx HW timestamping support

From: Ziwei Xiao <ziweixiao@...gle.com>

This patch series add the support of Rx HW timestamping, which sends
adminq commands periodically to the device for clock synchronization with
the NIC.

The ability to read the PHC from user space will be added in the
future patch series when adding the actual PTP support. For this patch
series, it's adding the initial ptp to utilize the ptp_schedule_worker
to schedule the work of syncing the NIC clock.

Changes:
v5:
  - Change to register PTP when initializing the driver and keep it
    alive until destroying the driver. (Jakub Kicinski)
  - Utilize ptp_cancel_worker_sync instead of unregistering the PHC
    every time when rx timestamping is disabled. (Jakub Kicinski)
  - Add gve_clock_nic_ts_read before the ptp_schedule_worker to do
    the first refresh. (Jakub Kicinski)
  - Add the phc_index info into the gve_get_ts_info. (Jakub Kicinski)
v4:
  - release the ptp in the error path of gve_init_clock (Jakub Kicinski)
  - add two more reserved fields in gve_nic_ts_report, anticipating
    upcoming use, to align size expectations with the device from the
    start (team internal review, Shachar Raindel)
v3:
  - change the last_read to be u64 on patch 6/8 (Vadim Fedorenko)
  - update the title and commit message of patch 7/8 to show it's adding
    support for ndo functions instead of ioctls (Jakub Kicinski)
  - Utilize extack for error logging instead of dev_err (Jakub Kicinski)
v2:
  - add initial PTP device support to utilize the ptp's aux_work to
    schedule sending adminq commands periodically (Jakub Kicinski,
    Vadim Fedorenko)
  - add adminq lock patch into this patch series instead of sending out
    to net since it's only needed to resolve the conflicts between the
    upcoming PTP aux_work and the queue creation/destruction adminq
    commands (Jakub Kicinski)
  - add the missing READ_ONCE (Joe Damato)

Harshitha Ramamurthy (1):
  gve: Add initial PTP device support

John Fraker (5):
  gve: Add device option for nic clock synchronization
  gve: Add adminq command to report nic timestamp
  gve: Add rx hardware timestamp expansion
  gve: Implement ndo_hwtstamp_get/set for RX timestamping
  gve: Advertise support for rx hardware timestamping

Kevin Yang (1):
  gve: Add support to query the nic clock

Ziwei Xiao (1):
  gve: Add adminq lock for queues creation and destruction

 drivers/net/ethernet/google/Kconfig           |   1 +
 drivers/net/ethernet/google/gve/Makefile      |   4 +-
 drivers/net/ethernet/google/gve/gve.h         |  35 +++++
 drivers/net/ethernet/google/gve/gve_adminq.c  |  98 ++++++++++--
 drivers/net/ethernet/google/gve/gve_adminq.h  |  28 ++++
 .../net/ethernet/google/gve/gve_desc_dqo.h    |   3 +-
 drivers/net/ethernet/google/gve/gve_ethtool.c |  26 +++-
 drivers/net/ethernet/google/gve/gve_main.c    |  53 ++++++-
 drivers/net/ethernet/google/gve/gve_ptp.c     | 139 ++++++++++++++++++
 drivers/net/ethernet/google/gve/gve_rx_dqo.c  |  26 ++++
 10 files changed, 396 insertions(+), 17 deletions(-)
 create mode 100644 drivers/net/ethernet/google/gve/gve_ptp.c

-- 
2.50.0.rc1.591.g9c95f17f64-goog

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