diff options
Diffstat (limited to 'drivers/net/ethernet/intel/ice/ice_nvm.c')
| -rw-r--r-- | drivers/net/ethernet/intel/ice/ice_nvm.c | 62 |
1 files changed, 60 insertions, 2 deletions
diff --git a/drivers/net/ethernet/intel/ice/ice_nvm.c b/drivers/net/ethernet/intel/ice/ice_nvm.c index ef68fa989a57..4cdce0370963 100644 --- a/drivers/net/ethernet/intel/ice/ice_nvm.c +++ b/drivers/net/ethernet/intel/ice/ice_nvm.c @@ -26,8 +26,7 @@ ice_aq_read_nvm(struct ice_hw *hw, u16 module_typeid, u32 offset, u16 length, cmd = &desc.params.nvm; - /* In offset the highest byte must be zeroed. */ - if (offset & 0xFF000000) + if (offset > ICE_AQC_NVM_MAX_OFFSET) return ICE_ERR_PARAM; ice_fill_dflt_direct_cmd_desc(&desc, ice_aqc_opc_nvm_read); @@ -364,6 +363,58 @@ static enum ice_status ice_get_orom_ver_info(struct ice_hw *hw) } /** + * ice_discover_flash_size - Discover the available flash size. + * @hw: pointer to the HW struct + * + * The device flash could be up to 16MB in size. However, it is possible that + * the actual size is smaller. Use bisection to determine the accessible size + * of flash memory. + */ +static enum ice_status ice_discover_flash_size(struct ice_hw *hw) +{ + u32 min_size = 0, max_size = ICE_AQC_NVM_MAX_OFFSET + 1; + enum ice_status status; + + status = ice_acquire_nvm(hw, ICE_RES_READ); + if (status) + return status; + + while ((max_size - min_size) > 1) { + u32 offset = (max_size + min_size) / 2; + u32 len = 1; + u8 data; + + status = ice_read_flat_nvm(hw, offset, &len, &data, false); + if (status == ICE_ERR_AQ_ERROR && + hw->adminq.sq_last_status == ICE_AQ_RC_EINVAL) { + ice_debug(hw, ICE_DBG_NVM, + "%s: New upper bound of %u bytes\n", + __func__, offset); + status = 0; + max_size = offset; + } else if (!status) { + ice_debug(hw, ICE_DBG_NVM, + "%s: New lower bound of %u bytes\n", + __func__, offset); + min_size = offset; + } else { + /* an unexpected error occurred */ + goto err_read_flat_nvm; + } + } + + ice_debug(hw, ICE_DBG_NVM, + "Predicted flash size is %u bytes\n", max_size); + + hw->nvm.flash_size = max_size; + +err_read_flat_nvm: + ice_release_nvm(hw); + + return status; +} + +/** * ice_init_nvm - initializes NVM setting * @hw: pointer to the HW struct * @@ -421,6 +472,13 @@ enum ice_status ice_init_nvm(struct ice_hw *hw) nvm->eetrack = (eetrack_hi << 16) | eetrack_lo; + status = ice_discover_flash_size(hw); + if (status) { + ice_debug(hw, ICE_DBG_NVM, + "NVM init error: failed to discover flash size.\n"); + return status; + } + switch (hw->device_id) { /* the following devices do not have boot_cfg_tlv yet */ case ICE_DEV_ID_E823C_BACKPLANE: |