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net: ethtool: Introduce a command to list PHYs on an interface

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As we have the ability to track the PHYs connected to a net_device
through the link_topology, we can expose this list to userspace. This
allows userspace to use these identifiers for phy-specific commands and
take the decision of which PHY to target by knowing the link topology.

Add PHY_GET and PHY_DUMP, which can be a filtered DUMP operation to list
devices on only one interface.

Signed-off-by: Maxime Chevallier <maxime.chevallier@bootlin.com>
Reviewed-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Tested-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Maxime Chevallier
2024-08-21 17:10:01 +02:00
committed by David S. Miller
parent 9af0e89d6c
commit 17194be4c8
6 changed files with 384 additions and 1 deletions
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19
include/uapi/linux/ethtool_netlink.h
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@@ -58,6 +58,7 @@ enum {
ETHTOOL_MSG_MM_GET,
ETHTOOL_MSG_MM_SET,
ETHTOOL_MSG_MODULE_FW_FLASH_ACT,
ETHTOOL_MSG_PHY_GET,
/* add new constants above here */
__ETHTOOL_MSG_USER_CNT,
@@ -111,6 +112,8 @@ enum {
ETHTOOL_MSG_MM_GET_REPLY,
ETHTOOL_MSG_MM_NTF,
ETHTOOL_MSG_MODULE_FW_FLASH_NTF,
ETHTOOL_MSG_PHY_GET_REPLY,
ETHTOOL_MSG_PHY_NTF,
/* add new constants above here */
__ETHTOOL_MSG_KERNEL_CNT,
@@ -1055,6 +1058,22 @@ enum {
ETHTOOL_A_MODULE_FW_FLASH_MAX = (__ETHTOOL_A_MODULE_FW_FLASH_CNT - 1)
};
enum {
ETHTOOL_A_PHY_UNSPEC,
ETHTOOL_A_PHY_HEADER, /* nest - _A_HEADER_* */
ETHTOOL_A_PHY_INDEX, /* u32 */
ETHTOOL_A_PHY_DRVNAME, /* string */
ETHTOOL_A_PHY_NAME, /* string */
ETHTOOL_A_PHY_UPSTREAM_TYPE, /* u32 */
ETHTOOL_A_PHY_UPSTREAM_INDEX, /* u32 */
ETHTOOL_A_PHY_UPSTREAM_SFP_NAME, /* string */
ETHTOOL_A_PHY_DOWNSTREAM_SFP_NAME, /* string */
/* add new constants above here */
__ETHTOOL_A_PHY_CNT,
ETHTOOL_A_PHY_MAX = (__ETHTOOL_A_PHY_CNT - 1)
};
/* generic netlink info */
#define ETHTOOL_GENL_NAME "ethtool"
#define ETHTOOL_GENL_VERSION 1