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ethtool: Allow network drivers to dump arbitrary EEPROM data

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Define get_module_eeprom_by_page() ethtool callback and implement
netlink infrastructure.

get_module_eeprom_by_page() allows network drivers to dump a part of
module's EEPROM specified by page and bank numbers along with offset and
length. It is effectively a netlink replacement for get_module_info()
and get_module_eeprom() pair, which is needed due to emergence of
complex non-linear EEPROM layouts.

Signed-off-by: Vladyslav Tarasiuk <vladyslavt@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Vladyslav Tarasiuk 2021-04-09 11:06:34 +03:00 • committed by David S. Miller
parent cbd3125392
commit c781ff12a2
7 changed files with 270 additions and 4 deletions
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19
include/uapi/linux/ethtool_netlink.h
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@ -44,6 +44,7 @@ enum {
ETHTOOL_MSG_TUNNEL_INFO_GET,
ETHTOOL_MSG_FEC_GET,
ETHTOOL_MSG_FEC_SET,
ETHTOOL_MSG_MODULE_EEPROM_GET,
/* add new constants above here */
__ETHTOOL_MSG_USER_CNT,
@ -84,6 +85,7 @@ enum {
ETHTOOL_MSG_TUNNEL_INFO_GET_REPLY,
ETHTOOL_MSG_FEC_GET_REPLY,
ETHTOOL_MSG_FEC_NTF,
ETHTOOL_MSG_MODULE_EEPROM_GET_REPLY,
/* add new constants above here */
__ETHTOOL_MSG_KERNEL_CNT,
@ -646,6 +648,23 @@ enum {
ETHTOOL_A_FEC_MAX = (__ETHTOOL_A_FEC_CNT - 1)
};
/* MODULE EEPROM */
enum {
ETHTOOL_A_MODULE_EEPROM_UNSPEC,
ETHTOOL_A_MODULE_EEPROM_HEADER, /* nest - _A_HEADER_* */
ETHTOOL_A_MODULE_EEPROM_OFFSET, /* u32 */
ETHTOOL_A_MODULE_EEPROM_LENGTH, /* u32 */
ETHTOOL_A_MODULE_EEPROM_PAGE, /* u8 */
ETHTOOL_A_MODULE_EEPROM_BANK, /* u8 */
ETHTOOL_A_MODULE_EEPROM_I2C_ADDRESS, /* u8 */
ETHTOOL_A_MODULE_EEPROM_DATA, /* nested */
__ETHTOOL_A_MODULE_EEPROM_CNT,
ETHTOOL_A_MODULE_EEPROM_MAX = (__ETHTOOL_A_MODULE_EEPROM_CNT - 1)
};
/* generic netlink info */
#define ETHTOOL_GENL_NAME "ethtool"
#define ETHTOOL_GENL_VERSION 1