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devlink: Introduce external controller flag

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A devlink eswitch port may represent PCI PF/VF ports of a controller.

A controller either located on same system or it can be an external
controller located in host where such NIC is plugged in.

Add the ability for driver to specify if a port is for external
controller.

Use such flag in the mlx5_core driver.

An example of an external controller having VF1 of PF0 belong to
controller 1.

$ devlink port show pci/0000:06:00.0/2
pci/0000:06:00.0/2: type eth netdev ens2f0pf0vf1 flavour pcivf pfnum 0 vfnum 1 external true splittable false
  function:
    hw_addr 00:00:00:00:00:00
$ devlink port show pci/0000:06:00.0/2 -jp
{
    "port": {
        "pci/0000:06:00.0/2": {
            "type": "eth",
            "netdev": "ens2f0pf0vf1",
            "flavour": "pcivf",
            "pfnum": 0,
            "vfnum": 1,
            "external": true,
            "splittable": false,
            "function": {
                "hw_addr": "00:00:00:00:00:00"
            }
        }
    }
}

Signed-off-by: Parav Pandit <parav@nvidia.com>
Reviewed-by: Jiri Pirko <jiri@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Parav Pandit
2020-09-09 07:50:36 +03:00
committed by David S. Miller
parent ff03e63ad1
commit 05b595e9c4
4 changed files with 21 additions and 6 deletions
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12
net/core/devlink.c
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@@ -526,6 +526,8 @@ static int devlink_nl_port_attrs_put(struct sk_buff *msg,
if (nla_put_u16(msg, DEVLINK_ATTR_PORT_PCI_PF_NUMBER,
attrs->pci_pf.pf))
return -EMSGSIZE;
if (nla_put_u8(msg, DEVLINK_ATTR_PORT_EXTERNAL, attrs->pci_pf.external))
return -EMSGSIZE;
break;
case DEVLINK_PORT_FLAVOUR_PCI_VF:
if (nla_put_u16(msg, DEVLINK_ATTR_PORT_PCI_PF_NUMBER,
@@ -533,6 +535,8 @@ static int devlink_nl_port_attrs_put(struct sk_buff *msg,
nla_put_u16(msg, DEVLINK_ATTR_PORT_PCI_VF_NUMBER,
attrs->pci_vf.vf))
return -EMSGSIZE;
if (nla_put_u8(msg, DEVLINK_ATTR_PORT_EXTERNAL, attrs->pci_vf.external))
return -EMSGSIZE;
break;
case DEVLINK_PORT_FLAVOUR_PHYSICAL:
case DEVLINK_PORT_FLAVOUR_CPU:
@@ -7716,8 +7720,9 @@ EXPORT_SYMBOL_GPL(devlink_port_attrs_set);
*
* @devlink_port: devlink port
* @pf: associated PF for the devlink port instance
* @external: indicates if the port is for an external controller
*/
void devlink_port_attrs_pci_pf_set(struct devlink_port *devlink_port, u16 pf)
void devlink_port_attrs_pci_pf_set(struct devlink_port *devlink_port, u16 pf, bool external)
{
struct devlink_port_attrs *attrs = &devlink_port->attrs;
int ret;
@@ -7728,6 +7733,7 @@ void devlink_port_attrs_pci_pf_set(struct devlink_port *devlink_port, u16 pf)
return;
attrs->pci_pf.pf = pf;
attrs->pci_pf.external = external;
}
EXPORT_SYMBOL_GPL(devlink_port_attrs_pci_pf_set);
@@ -7737,9 +7743,10 @@ EXPORT_SYMBOL_GPL(devlink_port_attrs_pci_pf_set);
* @devlink_port: devlink port
* @pf: associated PF for the devlink port instance
* @vf: associated VF of a PF for the devlink port instance
* @external: indicates if the port is for an external controller
*/
void devlink_port_attrs_pci_vf_set(struct devlink_port *devlink_port,
u16 pf, u16 vf)
u16 pf, u16 vf, bool external)
{
struct devlink_port_attrs *attrs = &devlink_port->attrs;
int ret;
@@ -7750,6 +7757,7 @@ void devlink_port_attrs_pci_vf_set(struct devlink_port *devlink_port,
return;
attrs->pci_vf.pf = pf;
attrs->pci_vf.vf = vf;
attrs->pci_vf.external = external;
}
EXPORT_SYMBOL_GPL(devlink_port_attrs_pci_vf_set);