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devlink: introduce line card devices support

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Line card can contain one or more devices that makes sense to make
visible to the user. For example, this can be a gearbox with
flash memory, which could be updated.

Provide the driver possibility to attach such devices to a line card
and expose those to user.

Example:
$ devlink lc show pci/0000:01:00.0 lc 8
pci/0000:01:00.0:
  lc 8 state active type 16x100G
    supported_types:
      16x100G
    devices:
      device 0
      device 1
      device 2
      device 3

Signed-off-by: Jiri Pirko <jiri@nvidia.com>
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jiri Pirko
2022-04-25 06:44:21 +03:00
committed by David S. Miller
parent cfc1d91a7d
commit 8d92e4fbcf
3 changed files with 113 additions and 1 deletions
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3
include/uapi/linux/devlink.h
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@@ -575,6 +575,9 @@ enum devlink_attr {
DEVLINK_ATTR_LINECARD_STATE, /* u8 */
DEVLINK_ATTR_LINECARD_TYPE, /* string */
DEVLINK_ATTR_LINECARD_SUPPORTED_TYPES, /* nested */
DEVLINK_ATTR_LINECARD_DEVICE_LIST, /* nested */
DEVLINK_ATTR_LINECARD_DEVICE, /* nested */
DEVLINK_ATTR_LINECARD_DEVICE_INDEX, /* u32 */
/* add new attributes above here, update the policy in devlink.c */