The ICSSG firmware maintains set of stats called PA_STATS.
Currently the driver only dumps 4 stats. Add support for dumping more
stats.
The offset for different stats are defined as MACROs in icssg_switch_map.h
file. All the offsets are for Slice0. Slice1 offsets are slice0 + 4.
The offset calculation is taken care while reading the stats in
emac_update_hardware_stats().
The statistics are documented in
Documentation/networking/device_drivers/icssg_prueth.rst
Reviewed-by: Simon Horman <horms@kernel.org>
Signed-off-by: MD Danish Anwar <danishanwar@ti.com>
Link: https://patch.msgid.link/20250424095316.2643573-1-danishanwar@ti.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Add support for dumping PA stats registers via ethtool.
Firmware maintained stats are stored at PA Stats registers.
Also modify emac_get_strings() API to use ethtool_puts().
This commit also maintains consistency between miig_stats and pa_stats by
- renaming the array icssg_all_stats to icssg_all_miig_stats
- renaming the structure icssg_stats to icssg_miig_stats
- renaming ICSSG_STATS() to ICSSG_MIIG_STATS()
- changing order of stats related data structures and arrays so that data
structures of a certain stats type is clubbed together.
Signed-off-by: MD Danish Anwar <danishanwar@ti.com>
Link: https://patch.msgid.link/20240822122652.1071801-3-danishanwar@ti.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Add icssg_stats.c to help dump, icssg related driver statistics.
ICSSG has hardware registers for providing statistics like total rx bytes,
total tx bytes, etc. These registers are of 32 bits and hence in case of 1G
link, they overflows in around 32 seconds. The behaviour of these registers
is such that they don't roll back to 0 after overflow but rather stay at
UINT_MAX.
These registers support a feature where the value written to them is
subtracted from the register. This feature can be utilized to fix the
overflowing of stats.
This solution uses a Workqueues based solution where a function gets
called before the registers overflow (every 25 seconds in 1G link, 25000
seconds in 100M link), this function saves the register
values in local variables and writes the last read value to the
register. So any update during the read will be taken care of.
Signed-off-by: MD Danish Anwar <danishanwar@ti.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
