ethtool: Add ability to flash transceiver modules' firmware

Add the ability to flash the modules' firmware by implementing the
interface between the user space and the kernel.

Example from a succee

ethtool: Add ability to flash transceiver modules' firmware

Add the ability to flash the modules' firmware by implementing the
interface between the user space and the kernel.

Example from a succeeding implementation:

# ethtool --flash-module-firmware swp40 file test.bin

Transceiver module firmware flashing started for device swp40
Transceiver module firmware flashing in progress for device swp40
Progress: 99%
Transceiver module firmware flashing completed for device swp40

In addition, add infrastructure that allows modules to set socket-specific
private data. This ensures that when a socket is closed from user space
during the flashing process, the right socket halts sending notifications
to user space until the work item is completed.

Signed-off-by: Danielle Ratson <[email protected]>
Reviewed-by: Petr Machata <[email protected]>
Signed-off-by: David S. Miller <[email protected]>

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ethtool: cmis_fw_update: add a layer for supporting firmware update using CDB

According to the CMIS standard, the firmware update process is done using
a CDB commands sequence.

Implement a work tha

ethtool: cmis_fw_update: add a layer for supporting firmware update using CDB

According to the CMIS standard, the firmware update process is done using
a CDB commands sequence.

Implement a work that will be triggered from the module layer in the
next patch the will initiate and execute all the CDB commands in order, to
eventually complete the firmware update process.

This flashing process includes, writing the firmware image, running the new
firmware image and committing it after testing, so that it will run upon
reset.

This work will also notify user space about the progress of the firmware
update process.

Signed-off-by: Danielle Ratson <[email protected]>
Reviewed-by: Petr Machata <[email protected]>
Signed-off-by: David S. Miller <[email protected]>

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ethtool: cmis_cdb: Add a layer for supporting CDB commands

CDB (Command Data Block Message Communication) reads and writes are
performed on memory map pages 9Fh-AFh according to the CMIS standard,
s

ethtool: cmis_cdb: Add a layer for supporting CDB commands

CDB (Command Data Block Message Communication) reads and writes are
performed on memory map pages 9Fh-AFh according to the CMIS standard,
section 8.20 of revision 5.2.
Page 9Fh is used to specify the CDB command to be executed and also
provides an area for a local payload (LPL).

According to the CMIS standard, the firmware update process is done using
a CDB commands sequence that will be implemented in the next patch.

The kernel interface that will implement the firmware update using CDB
command will include 2 layers that will be added under ethtool:

* The upper layer that will be triggered from the module layer, is
cmis_fw_update.
* The lower one is cmis_cdb.

In the future there might be more operations to implement using CDB
commands. Therefore, the idea is to keep the CDB interface clean and the
cmis_fw_update specific to the CDB commands handling it.

These two layers will communicate using the API the consists of three
functions:

- struct ethtool_cmis_cdb *
ethtool_cmis_cdb_init(struct net_device *dev,
struct ethtool_module_fw_flash_params *params);
- void ethtool_cmis_cdb_fini(struct ethtool_cmis_cdb *cdb);
- int ethtool_cmis_cdb_execute_cmd(struct net_device *dev,
struct ethtool_cmis_cdb_cmd_args *args);

Add the CDB layer to support initializing, finishing and executing CDB
commands:

* The initialization process will include creating of an ethtool_cmis_cdb
instance, querying the module CDB support, entering and validating the
password from user space (CMD 0x0000) and querying the module features
(CMD 0x0040).

* The finishing API will simply free the ethtool_cmis_cdb instance.

* The executing process will write the CDB command to EEPROM using
set_module_eeprom_by_page() that was presented earlier, and will
process the reply from EEPROM.

Signed-off-by: Danielle Ratson <[email protected]>
Reviewed-by: Petr Machata <[email protected]>
Signed-off-by: David S. Miller <[email protected]>

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ethtool: Add flashing transceiver modules' firmware notifications ability

Add progress notifications ability to user space while flashing modules'
firmware by implementing the interface between the

ethtool: Add flashing transceiver modules' firmware notifications ability

Add progress notifications ability to user space while flashing modules'
firmware by implementing the interface between the user space and the
kernel.

Signed-off-by: Danielle Ratson <[email protected]>
Reviewed-by: Petr Machata <[email protected]>
Reviewed-by: Andrew Lunn <[email protected]>
Signed-off-by: David S. Miller <[email protected]>

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