diff options
| author | Jacob Keller <jacob.e.keller@intel.com> | 2020-03-11 18:58:13 -0700 |
|---|---|---|
| committer | Jeff Kirsher <jeffrey.t.kirsher@intel.com> | 2020-03-21 00:29:10 -0700 |
| commit | 81f07491e2bf264a871c319c70679c55230baebd (patch) | |
| tree | 96fa8012ca31421ce7c9abbec2887b40ee8e0f69 /drivers/net/ethernet/intel/ice/ice_type.h | |
| parent | d4e874448ecee45267cfff32871a32575a20e2f1 (diff) | |
ice: discover and store size of available flash
When reading from the NVM using a flat address, it is useful to know the
upper bound on the size of the flash contents. This value is not stored
within the NVM.
We can determine the size by performing a bisection between upper and
lower bounds. It is known that the size cannot exceed 16 MB (offset of
0xFFFFFF).
Use a while loop to bisect the upper and lower bounds by reading one
byte at a time. On a failed read, lower the maximum bound. On
a successful read, increase the lower bound.
Save this as the flash_size in the ice_nvm_info structure that contains
data related to the NVM.
The size will be used in a future patch for implementing full NVM read
via ethtool's GEEPROM command.
The maximum possible size for the flash is bounded by the size limit for
the NVM AdminQ commands. Add a new macro, ICE_AQC_NVM_MAX_OFFSET, which
can be used to represent this upper bound.
Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Reviewed-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Diffstat (limited to 'drivers/net/ethernet/intel/ice/ice_type.h')
| -rw-r--r-- | drivers/net/ethernet/intel/ice/ice_type.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/net/ethernet/intel/ice/ice_type.h b/drivers/net/ethernet/intel/ice/ice_type.h index 5bc94217778e..b6a20670e915 100644 --- a/drivers/net/ethernet/intel/ice/ice_type.h +++ b/drivers/net/ethernet/intel/ice/ice_type.h @@ -251,6 +251,7 @@ struct ice_nvm_info { struct ice_orom_info orom; /* Option ROM version info */ u32 eetrack; /* NVM data version */ u16 sr_words; /* Shadow RAM size in words */ + u32 flash_size; /* Size of available flash in bytes */ u8 major_ver; /* major version of NVM package */ u8 minor_ver; /* minor version of dev starter */ u8 blank_nvm_mode; /* is NVM empty (no FW present) */ |