diff options
Diffstat (limited to 'drivers/net/ethernet/intel/ice/ice_nvm.c')
| -rw-r--r-- | drivers/net/ethernet/intel/ice/ice_nvm.c | 151 |
1 files changed, 151 insertions, 0 deletions
diff --git a/drivers/net/ethernet/intel/ice/ice_nvm.c b/drivers/net/ethernet/intel/ice/ice_nvm.c index f446f89b551b..0649923d6e2f 100644 --- a/drivers/net/ethernet/intel/ice/ice_nvm.c +++ b/drivers/net/ethernet/intel/ice/ice_nvm.c @@ -604,6 +604,151 @@ err_read_flat_nvm: } /** + * ice_read_sr_pointer - Read the value of a Shadow RAM pointer word + * @hw: pointer to the HW structure + * @offset: the word offset of the Shadow RAM word to read + * @pointer: pointer value read from Shadow RAM + * + * Read the given Shadow RAM word, and convert it to a pointer value specified + * in bytes. This function assumes the specified offset is a valid pointer + * word. + * + * Each pointer word specifies whether it is stored in word size or 4KB + * sector size by using the highest bit. The reported pointer value will be in + * bytes, intended for flat NVM reads. + */ +static enum ice_status +ice_read_sr_pointer(struct ice_hw *hw, u16 offset, u32 *pointer) +{ + enum ice_status status; + u16 value; + + status = ice_read_sr_word(hw, offset, &value); + if (status) + return status; + + /* Determine if the pointer is in 4KB or word units */ + if (value & ICE_SR_NVM_PTR_4KB_UNITS) + *pointer = (value & ~ICE_SR_NVM_PTR_4KB_UNITS) * 4 * 1024; + else + *pointer = value * 2; + + return 0; +} + +/** + * ice_read_sr_area_size - Read an area size from a Shadow RAM word + * @hw: pointer to the HW structure + * @offset: the word offset of the Shadow RAM to read + * @size: size value read from the Shadow RAM + * + * Read the given Shadow RAM word, and convert it to an area size value + * specified in bytes. This function assumes the specified offset is a valid + * area size word. + * + * Each area size word is specified in 4KB sector units. This function reports + * the size in bytes, intended for flat NVM reads. + */ +static enum ice_status +ice_read_sr_area_size(struct ice_hw *hw, u16 offset, u32 *size) +{ + enum ice_status status; + u16 value; + + status = ice_read_sr_word(hw, offset, &value); + if (status) + return status; + + /* Area sizes are always specified in 4KB units */ + *size = value * 4 * 1024; + + return 0; +} + +/** + * ice_determine_active_flash_banks - Discover active bank for each module + * @hw: pointer to the HW struct + * + * Read the Shadow RAM control word and determine which banks are active for + * the NVM, OROM, and Netlist modules. Also read and calculate the associated + * pointer and size. These values are then cached into the ice_flash_info + * structure for later use in order to calculate the correct offset to read + * from the active module. + */ +static enum ice_status +ice_determine_active_flash_banks(struct ice_hw *hw) +{ + struct ice_bank_info *banks = &hw->flash.banks; + enum ice_status status; + u16 ctrl_word; + + status = ice_read_sr_word(hw, ICE_SR_NVM_CTRL_WORD, &ctrl_word); + if (status) { + ice_debug(hw, ICE_DBG_NVM, "Failed to read the Shadow RAM control word\n"); + return status; + } + + /* Check that the control word indicates validity */ + if ((ctrl_word & ICE_SR_CTRL_WORD_1_M) >> ICE_SR_CTRL_WORD_1_S != ICE_SR_CTRL_WORD_VALID) { + ice_debug(hw, ICE_DBG_NVM, "Shadow RAM control word is invalid\n"); + return ICE_ERR_CFG; + } + + if (!(ctrl_word & ICE_SR_CTRL_WORD_NVM_BANK)) + banks->nvm_bank = ICE_1ST_FLASH_BANK; + else + banks->nvm_bank = ICE_2ND_FLASH_BANK; + + if (!(ctrl_word & ICE_SR_CTRL_WORD_OROM_BANK)) + banks->orom_bank = ICE_1ST_FLASH_BANK; + else + banks->orom_bank = ICE_2ND_FLASH_BANK; + + if (!(ctrl_word & ICE_SR_CTRL_WORD_NETLIST_BANK)) + banks->netlist_bank = ICE_1ST_FLASH_BANK; + else + banks->netlist_bank = ICE_2ND_FLASH_BANK; + + status = ice_read_sr_pointer(hw, ICE_SR_1ST_NVM_BANK_PTR, &banks->nvm_ptr); + if (status) { + ice_debug(hw, ICE_DBG_NVM, "Failed to read NVM bank pointer\n"); + return status; + } + + status = ice_read_sr_area_size(hw, ICE_SR_NVM_BANK_SIZE, &banks->nvm_size); + if (status) { + ice_debug(hw, ICE_DBG_NVM, "Failed to read NVM bank area size\n"); + return status; + } + + status = ice_read_sr_pointer(hw, ICE_SR_1ST_OROM_BANK_PTR, &banks->orom_ptr); + if (status) { + ice_debug(hw, ICE_DBG_NVM, "Failed to read OROM bank pointer\n"); + return status; + } + + status = ice_read_sr_area_size(hw, ICE_SR_OROM_BANK_SIZE, &banks->orom_size); + if (status) { + ice_debug(hw, ICE_DBG_NVM, "Failed to read OROM bank area size\n"); + return status; + } + + status = ice_read_sr_pointer(hw, ICE_SR_NETLIST_BANK_PTR, &banks->netlist_ptr); + if (status) { + ice_debug(hw, ICE_DBG_NVM, "Failed to read Netlist bank pointer\n"); + return status; + } + + status = ice_read_sr_area_size(hw, ICE_SR_NETLIST_BANK_SIZE, &banks->netlist_size); + if (status) { + ice_debug(hw, ICE_DBG_NVM, "Failed to read Netlist bank area size\n"); + return status; + } + + return 0; +} + +/** * ice_init_nvm - initializes NVM setting * @hw: pointer to the HW struct * @@ -643,6 +788,12 @@ enum ice_status ice_init_nvm(struct ice_hw *hw) return status; } + status = ice_determine_active_flash_banks(hw); + if (status) { + ice_debug(hw, ICE_DBG_NVM, "Failed to determine active flash banks.\n"); + return status; + } + status = ice_get_nvm_ver_info(hw, &flash->nvm); if (status) { ice_debug(hw, ICE_DBG_INIT, "Failed to read NVM info.\n"); |