There are two different timestamp formats can be provided potentially
by mlx5 supported hardware.
The free-running format provides some opaque values captured from
internal clock counter clocked by some independent oscillator.
The free-running frequency is not pre-defined and should be queried
from the NIC.
The real-time timestamps are presented in nanoseconds and captured from
the dedicated UTC counter, that can be adjusted on the fly and might be
synchronized with some external master clock.
Depending on the version and configuration the hardware might support
either FR or RT timestamps, or both in the same time on per queue basis.
Since firmware version xx.30.0256 the timestamp format can be configured
via fields in the queue context at the object creation time. For the
compatibility reasons the default zero value configures timestamps with
free-running format. The NIC ConnectX-5 and earlier ones support the
free-running format only. Since ConnectX-6 both formats might be supported
and configured. The default zero value (specified in the non-defined
yet timestamp format context field) causes the queue creation failure
(rejected by firmware) if the NIC is configured to real-time timestamp
format.
Hence, it is crucial to check whether firmware/hardware supports
timestamp formats and configure queues accordingly, and this patchset
also must be provided for stable DPDK releases.
Compatibility affected (without this patchset) summary:
- ConnectX-6DX or BlueField 2
- real-time format is configured in NV settings
- firmware is xx.30.1000 or higher
Viacheslav Ovsiienko (5):
common/mlx5: add timestamp format support to DevX
net/mlx5: add timestamp format support
vdpa/mlx5: add timestamp format support
regex/mlx5: add timestamp format support
compress/mlx5: add timestamp format support
drivers/common/mlx5/mlx5_devx_cmds.c | 35 ++++++++++++++--
drivers/common/mlx5/mlx5_devx_cmds.h | 7 ++++
drivers/common/mlx5/mlx5_prm.h | 55 +++++++++++++++++++++++--
drivers/compress/mlx5/mlx5_compress.c | 3 ++
drivers/net/mlx5/linux/mlx5_os.c | 3 ++
drivers/net/mlx5/mlx5.h | 3 ++
drivers/net/mlx5/mlx5_devx.c | 2 +-
drivers/net/mlx5/mlx5_flow_age.c | 7 +++-
drivers/net/mlx5/mlx5_txpp.c | 2 +
drivers/net/mlx5/windows/mlx5_os.c | 3 ++
drivers/regex/mlx5/mlx5_regex.c | 1 +
drivers/regex/mlx5/mlx5_regex.h | 1 +
drivers/regex/mlx5/mlx5_regex_control.c | 1 +
drivers/vdpa/mlx5/mlx5_vdpa.c | 1 +
drivers/vdpa/mlx5/mlx5_vdpa.h | 1 +
drivers/vdpa/mlx5/mlx5_vdpa_event.c | 2 +
16 files changed, 117 insertions(+), 10 deletions(-)
--
v1: https://inbox.dpdk.org/dev/20210307100251.22538-1-viachesl...@nvidia.com/
v2: - remove non needed settings for hairpins
- the unified inline routine to set timestamp format
- typos and rewording commit messages
v3: - fix minor typo bug (, -> ;) in code
- add missed v3 tag
--
2.28.0
