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devlink: add device information API

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ethtool -i has served us well for a long time, but its showing
its limitations more and more. The device information should
also be reported per device not per-netdev.

Lay foundation for a simple devlink-based way of reading device
info. Add driver name and device serial number as initial pieces
of information exposed via this new API.

v3:
 - rename helpers (Jiri);
 - rename driver name attr (Jiri);
 - remove double spacing in commit message (Jiri).
RFC v2:
 - wrap the skb into an opaque structure (Jiri);
 - allow the serial number of be any length (Jiri & Andrew);
 - add driver name (Jonathan).

Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Acked-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jakub Kicinski
2019-01-31 10:50:40 -08:00
committed by David S. Miller
parent 26281e2c83
commit f9cf22882c
3 changed files with 135 additions and 0 deletions
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5
include/uapi/linux/devlink.h
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@@ -94,6 +94,8 @@ enum devlink_command {
DEVLINK_CMD_PORT_PARAM_NEW,
DEVLINK_CMD_PORT_PARAM_DEL,
DEVLINK_CMD_INFO_GET, /* can dump */
/* add new commands above here */
__DEVLINK_CMD_MAX,
DEVLINK_CMD_MAX = __DEVLINK_CMD_MAX - 1
@@ -290,6 +292,9 @@ enum devlink_attr {
DEVLINK_ATTR_REGION_CHUNK_ADDR, /* u64 */
DEVLINK_ATTR_REGION_CHUNK_LEN, /* u64 */
DEVLINK_ATTR_INFO_DRIVER_NAME, /* string */
DEVLINK_ATTR_INFO_SERIAL_NUMBER, /* string */
/* add new attributes above here, update the policy in devlink.c */
__DEVLINK_ATTR_MAX,