On Tue, Jul 28, 2020 at 01:20:15PM +0300, Ido Schimmel wrote:
> From: Vadim Pasternak <vad...@mellanox.com>
>
> The Quad Small Form Factor Pluggable Double Density (QSFP-DD) hardware
> specification defines a form factor that supports up to 400 Gbps in
> aggregate over an 8x50-Gbps electrical interface. The QSFP-DD supports
> both optical and copper interfaces.
>
> Implementation is based on Common Management Interface Specification;
> Rev 4.0 May 8, 2019. Table 8-2 "Identifier and Status Summary (Lower
> Page)" from this spec defines "Id and Status" fields located at offsets
> 00h - 02h. Bit 2 at offset 02h ("Flat_mem") specifies QSFP EEPROM memory
> mode, which could be "upper memory flat" or "paged". Flat memory mode is
> coded "1", and indicates that only page 00h is implemented in EEPROM.
> Paged memory is coded "0" and indicates that pages 00h, 01h, 02h, 10h
> and 11h are implemented. Pages 10h and 11h are currently not supported
> by the driver.
>
> "Flat" memory mode is used for the passive copper transceivers. For this
> type only page 00h (256 bytes) is available. "Paged" memory is used for
> the optical transceivers. For this type pages 00h (256 bytes), 01h (128
> bytes) and 02h (128 bytes) are available. Upper page 01h contains static
> advertising field, while upper page 02h contains the module-defined
> thresholds and lane-specific monitors.
>
> Extend enumerator 'mlxsw_reg_mcia_eeprom_module_info_id' with additional
> field 'MLXSW_REG_MCIA_EEPROM_MODULE_INFO_TYPE_ID'. This field is used to
> indicate for QSFP-DD transceiver type which memory mode is to be used.
>
> Expose 256 bytes buffer for QSFP-DD passive copper transceiver and
> 512 bytes buffer for optical.
>
> Signed-off-by: Vadim Pasternak <vad...@mellanox.com>
> Signed-off-by: Ido Schimmel <ido...@mellanox.com>
Reviewed-by: Andrew Lunn <and...@lunn.ch>
Andrew
