• Paul M Stillwell Jr's avatar
    ice: add ability to read and configure FW log data · 9d3535e7
    Paul M Stillwell Jr authored
    Once logging is enabled the user should read the data from the 'data'
    file. The data is in the form of a binary blob that can be sent to Intel
    for decoding. To read the data use a command like:
    
      # cat /sys/kernel/debug/ice/0000\:18\:00.0/fwlog/data > log_data.bin
    
    If the user wants to clear the FW log data that has been stored in the
    driver then they can write any value to the 'data' file and that will clear
    the data. An example is:
    
      # echo 34 > /sys/kernel/debug/ice/0000\:18\:00.0/fwlog/data
    
    In addition to being able to read the data the user can configure how
    much memory is used to store FW log data. This allows the user to
    increase/decrease the amount of memory based on the users situation.
    The data is stored such that if the memory fills up then the oldest data
    will get overwritten in a circular manner. To change the amount of
    memory the user can write to the 'log_size' file like this:
    
      # echo <value> > /sys/kernel/debug/ice/0000\:18\:00.0/fwlog/log_size
    
    Where <value> is one of 128K, 256K, 512K, 1M, and 2M. The default value
    is 1M.
    
    The user can see the current value of 'log_size' by reading the file:
    
      # cat /sys/kernel/debug/ice/0000\:18\:00.0/fwlog/log_size
    Signed-off-by: default avatarPaul M Stillwell Jr <paul.m.stillwell.jr@intel.com>
    Tested-by: Pucha Himasekhar Reddy <himasekharx.reddy.pucha@intel.com> (A Contingent worker at Intel)
    Signed-off-by: default avatarTony Nguyen <anthony.l.nguyen@intel.com>
    9d3535e7
ice_debugfs.c 16.2 KB