Though hardware isn't implement CCMP-256, GCMP and GCMP-256, it's possible
to fallback to use software de-/en-cryption implemented by mac80211.
Without adding these chipers, kernel log will show something if we connect
to a WPA3 enterprise AP, likes
wlan0: failed to set key (1, ff:ff:ff:ff:ff:ff) to hardware (-524)
To know detail of SAR information, we add a debugfs entry to dump the raw
content written in ACPI, and also dump the translated data (real number in
decimal). The output looks like
Customer ID: 0x5048
WiFiEnable: 0x1
Total SAR Table Count: 3
Current SAR Table Index: (02 02 02 02)
RWSI is used to tell driver operating mode is changed. For example, a
notebook PC can also play as a tablet. Driver detects RWSI in period of
10 seconds, and reconfigure SAR power limit if RWSI values are changed.
We apply four frequency ranges to calculate TX power, though RWRD defines
five ranges. RWGS is used to adjust SAR power limit value and define the
upper bound corresponding to geography.
Three tables RWRD, RWSI and RWGS are defined to support SAR power limit
proposed by Realtek. RWRD describes main power limit values that can support
more than one mode, tablet, lid close and etc. RWSI is used to indicate
which mode is operating, so driver must apply SAR power limit corresponding
to the mode. Since each country (geography) has some different SAR power
limit values, RWGS is introduced to adjust power limit mentioned in RWRD
if stack hints driver that regulatory domain is changed.
RWRD contains customer ID, SAR enable, table count and SAR power limit.
With different customer ID, the formats of RWRD, RWSI and RWGS are
different, such as the number of fields in table and precision of power
limit value (in Q-notation). By now, two customer IDs are supported, RT
and HP. 'table count' indicates total number of tables corresponding to
operating modes, and selected by WRSI.
To valid RWSI and RWGS tables, we check if read length and sizeof() are
equal. But these checking statements depend on RWRD's ID are little
verbose, use two predefined values, rwsi_sz and rwgs_sz, would be easy
to understand the code.
WRDS is known as static SAR table, and we're going to support dynamic SAR
table named EWDS that contains three profiles, but definition of profile
is the same with WRDS. To share the common code, this commit generalizes
the code, but code logic is unchanged.
This commit will be merged into "rtw88: sar: Load SAR table from ACPI"
