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devlink: Expose port function commands to control RoCE

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Expose port function commands to enable / disable RoCE, this is used to
control the port RoCE device capabilities.

When RoCE is disabled for a function of the port, function cannot create
any RoCE specific resources (e.g GID table).
It also saves system memory utilization. For example disabling RoCE enable a
VF/SF saves 1 Mbytes of system memory per function.

Example of a PCI VF port which supports function configuration:
Set RoCE of the VF's port function.

$ devlink port show pci/0000:06:00.0/2
pci/0000:06:00.0/2: type eth netdev enp6s0pf0vf1 flavour pcivf pfnum 0
vfnum 1
    function:
        hw_addr 00:00:00:00:00:00 roce enable

$ devlink port function set pci/0000:06:00.0/2 roce disable

$ devlink port show pci/0000:06:00.0/2
pci/0000:06:00.0/2: type eth netdev enp6s0pf0vf1 flavour pcivf pfnum 0
vfnum 1
    function:
        hw_addr 00:00:00:00:00:00 roce disable

Signed-off-by: Shay Drory <shayd@nvidia.com>
Reviewed-by: Jiri Pirko <jiri@nvidia.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Shay Drory
2022-12-06 20:51:15 +02:00
committed by Jakub Kicinski
parent 875cd5eeba
commit da65e9ff3b
4 changed files with 174 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files
include/uapi/linux/devlink.h
+10
View File
@@ -658,11 +658,21 @@ enum devlink_resource_unit {
DEVLINK_RESOURCE_UNIT_ENTRY,
};
enum devlink_port_fn_attr_cap {
DEVLINK_PORT_FN_ATTR_CAP_ROCE_BIT,
/* Add new caps above */
__DEVLINK_PORT_FN_ATTR_CAPS_MAX,
};
#define DEVLINK_PORT_FN_CAP_ROCE _BITUL(DEVLINK_PORT_FN_ATTR_CAP_ROCE_BIT)
enum devlink_port_function_attr {
DEVLINK_PORT_FUNCTION_ATTR_UNSPEC,
DEVLINK_PORT_FUNCTION_ATTR_HW_ADDR, /* binary */
DEVLINK_PORT_FN_ATTR_STATE, /* u8 */
DEVLINK_PORT_FN_ATTR_OPSTATE, /* u8 */
DEVLINK_PORT_FN_ATTR_CAPS, /* bitfield32 */
__DEVLINK_PORT_FUNCTION_ATTR_MAX,
DEVLINK_PORT_FUNCTION_ATTR_MAX = __DEVLINK_PORT_FUNCTION_ATTR_MAX - 1