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Date: Wed, 15 May 2024 21:21:25 +0000
From: "Keller, Jacob E" <jacob.e.keller@...el.com>
To: Brett Creeley <bcreeley@....com>, Karthik Sundaravel
<ksundara@...hat.com>, "Brandeburg, Jesse" <jesse.brandeburg@...el.com>,
"Drewek, Wojciech" <wojciech.drewek@...el.com>, "sumang@...vell.com"
<sumang@...vell.com>, "Nguyen, Anthony L" <anthony.l.nguyen@...el.com>,
"davem@...emloft.net" <davem@...emloft.net>, "edumazet@...gle.com"
<edumazet@...gle.com>, "kuba@...nel.org" <kuba@...nel.org>,
"pabeni@...hat.com" <pabeni@...hat.com>, "intel-wired-lan@...ts.osuosl.org"
<intel-wired-lan@...ts.osuosl.org>, "netdev@...r.kernel.org"
<netdev@...r.kernel.org>, "linux-kernel@...r.kernel.org"
<linux-kernel@...r.kernel.org>, "horms@...nel.org" <horms@...nel.org>
CC: "pmenzel@...gen.mpg.de" <pmenzel@...gen.mpg.de>, "jiri@...nulli.us"
<jiri@...nulli.us>, "michal.swiatkowski@...ux.intel.com"
<michal.swiatkowski@...ux.intel.com>, "rjarry@...hat.com"
<rjarry@...hat.com>, "aharivel@...hat.com" <aharivel@...hat.com>,
"vchundur@...hat.com" <vchundur@...hat.com>, "cfontain@...hat.com"
<cfontain@...hat.com>
Subject: RE: [PATCH iwl-next v9] ice: Add get/set hw address for VFs using
devlink commands
> -----Original Message-----
> From: Brett Creeley <bcreeley@....com>
> Sent: Wednesday, May 15, 2024 9:53 AM
> To: Karthik Sundaravel <ksundara@...hat.com>; Brandeburg, Jesse
> <jesse.brandeburg@...el.com>; Drewek, Wojciech <wojciech.drewek@...el.com>;
> sumang@...vell.com; Keller, Jacob E <jacob.e.keller@...el.com>; Nguyen,
> Anthony L <anthony.l.nguyen@...el.com>; davem@...emloft.net;
> edumazet@...gle.com; kuba@...nel.org; pabeni@...hat.com; intel-wired-
> lan@...ts.osuosl.org; netdev@...r.kernel.org; linux-kernel@...r.kernel.org;
> horms@...nel.org
> Cc: pmenzel@...gen.mpg.de; jiri@...nulli.us;
> michal.swiatkowski@...ux.intel.com; rjarry@...hat.com; aharivel@...hat.com;
> vchundur@...hat.com; cfontain@...hat.com
> Subject: Re: [PATCH iwl-next v9] ice: Add get/set hw address for VFs using devlink
> commands
>
>
>
> On 5/15/2024 7:22 AM, Karthik Sundaravel wrote:
> > Caution: This message originated from an External Source. Use proper caution
> when opening attachments, clicking links, or responding.
> >
> >
> > Changing the MAC address of the VFs is currently unsupported via devlink.
> > Add the function handlers to set and get the HW address for the VFs.
> >
> > Signed-off-by: Karthik Sundaravel <ksundara@...hat.com>
> > ---
> > .../ethernet/intel/ice/devlink/devlink_port.c | 59 +++++++++++++++++-
> > drivers/net/ethernet/intel/ice/ice_sriov.c | 62 +++++++++++++++++++
> > drivers/net/ethernet/intel/ice/ice_sriov.h | 8 +++
> > 3 files changed, 128 insertions(+), 1 deletion(-)
> >
> > diff --git a/drivers/net/ethernet/intel/ice/devlink/devlink_port.c
> b/drivers/net/ethernet/intel/ice/devlink/devlink_port.c
> > index c9fbeebf7fb9..6ff7cba3f630 100644
> > --- a/drivers/net/ethernet/intel/ice/devlink/devlink_port.c
> > +++ b/drivers/net/ethernet/intel/ice/devlink/devlink_port.c
> > @@ -372,6 +372,62 @@ void ice_devlink_destroy_pf_port(struct ice_pf *pf)
> > devl_port_unregister(&pf->devlink_port);
> > }
> >
> > +/**
> > + * ice_devlink_port_get_vf_fn_mac - .port_fn_hw_addr_get devlink handler
> > + * @port: devlink port structure
> > + * @hw_addr: MAC address of the port
> > + * @hw_addr_len: length of MAC address
> > + * @extack: extended netdev ack structure
> > + *
> > + * Callback for the devlink .port_fn_hw_addr_get operation
> > + * Return: zero on success or an error code on failure.
> > + */
> > +static int ice_devlink_port_get_vf_fn_mac(struct devlink_port *port,
> > + u8 *hw_addr, int *hw_addr_len,
> > + struct netlink_ext_ack *extack)
> > +{
> > + struct ice_vf *vf = container_of(port, struct ice_vf, devlink_port);
> > +
> > + ether_addr_copy(hw_addr, vf->dev_lan_addr);
> > + *hw_addr_len = ETH_ALEN;
> > +
> > + return 0;
> > +}
> > +
> > +/**
> > + * ice_devlink_port_set_vf_fn_mac - .port_fn_hw_addr_set devlink handler
> > + * @port: devlink port structure
> > + * @hw_addr: MAC address of the port
> > + * @hw_addr_len: length of MAC address
> > + * @extack: extended netdev ack structure
> > + *
> > + * Callback for the devlink .port_fn_hw_addr_set operation
> > + * Return: zero on success or an error code on failure.
> > + */
> > +static int ice_devlink_port_set_vf_fn_mac(struct devlink_port *port,
> > + const u8 *hw_addr,
> > + int hw_addr_len,
> > + struct netlink_ext_ack *extack)
> > +
> > +{
> > + struct devlink_port_attrs *attrs = &port->attrs;
> > + struct devlink_port_pci_vf_attrs *pci_vf;
> > + struct devlink *devlink = port->devlink;
> > + struct ice_pf *pf;
> > + u16 vf_id;
> > +
> > + pf = devlink_priv(devlink);
> > + pci_vf = &attrs->pci_vf;
> > + vf_id = pci_vf->vf;
> > +
> > + return ice_set_vf_fn_mac(pf, vf_id, hw_addr);
>
> Instead of creating a duplicate function, it seems like you can do the
> following instead:
>
> pf = devlink_priv(devlink);
> vsi = ice_get_main_vsi(pf);
> if (!vsi)
> return -ENODEV;
>
> [...]
>
> return ice_set_vf_mac(vsi->netdev, vf_id, hw_addr);
>
> > +}
> > +
> > +static const struct devlink_port_ops ice_devlink_vf_port_ops = {
> > + .port_fn_hw_addr_get = ice_devlink_port_get_vf_fn_mac,
> > + .port_fn_hw_addr_set = ice_devlink_port_set_vf_fn_mac,
> > +};
> > +
> > /**
> > * ice_devlink_create_vf_port - Create a devlink port for this VF
> > * @vf: the VF to create a port for
> > @@ -407,7 +463,8 @@ int ice_devlink_create_vf_port(struct ice_vf *vf)
> > devlink_port_attrs_set(devlink_port, &attrs);
> > devlink = priv_to_devlink(pf);
> >
> > - err = devl_port_register(devlink, devlink_port, vsi->idx);
> > + err = devl_port_register_with_ops(devlink, devlink_port, vsi->idx,
> > + &ice_devlink_vf_port_ops);
> > if (err) {
> > dev_err(dev, "Failed to create devlink port for VF %d, error %d\n",
> > vf->vf_id, err);
> > diff --git a/drivers/net/ethernet/intel/ice/ice_sriov.c
> b/drivers/net/ethernet/intel/ice/ice_sriov.c
> > index 067712f4923f..dc40be741be0 100644
> > --- a/drivers/net/ethernet/intel/ice/ice_sriov.c
> > +++ b/drivers/net/ethernet/intel/ice/ice_sriov.c
> > @@ -1415,6 +1415,68 @@ ice_get_vf_cfg(struct net_device *netdev, int vf_id,
> struct ifla_vf_info *ivi)
> > return ret;
> > }
> >
> > +/**
> > + * ice_set_vf_fn_mac
> > + * @pf: PF to be configure
> > + * @vf_id: VF identifier
> > + * @mac: MAC address
> > + *
> > + * program VF MAC address
> > + */
> > +int ice_set_vf_fn_mac(struct ice_pf *pf, u16 vf_id, const u8 *mac)
> > +{
> > + struct device *dev;
> > + struct ice_vf *vf;
> > + int ret;
> > +
> > + dev = ice_pf_to_dev(pf);
> > + if (is_multicast_ether_addr(mac)) {
> > + dev_err(dev, "%pM not a valid unicast address\n", mac);
> > + return -EINVAL;
> > + }
> > +
> > + vf = ice_get_vf_by_id(pf, vf_id);
> > + if (!vf)
> > + return -EINVAL;
> > +
> > + /* nothing left to do, unicast MAC already set */
> > + if (ether_addr_equal(vf->dev_lan_addr, mac) &&
> > + ether_addr_equal(vf->hw_lan_addr, mac)) {
> > + ret = 0;
> > + goto out_put_vf;
> > + }
> > +
> > + ret = ice_check_vf_ready_for_cfg(vf);
> > + if (ret)
> > + goto out_put_vf;
> > +
> > + mutex_lock(&vf->cfg_lock);
> > +
> > + /* VF is notified of its new MAC via the PF's response to the
> > + * VIRTCHNL_OP_GET_VF_RESOURCES message after the VF has been reset
> > + */
> > + ether_addr_copy(vf->dev_lan_addr, mac);
> > + ether_addr_copy(vf->hw_lan_addr, mac);
> > + if (is_zero_ether_addr(mac)) {
> > + /* VF will send VIRTCHNL_OP_ADD_ETH_ADDR message with its MAC */
> > + vf->pf_set_mac = false;
> > + dev_info(dev, "Removing MAC on VF %d. VF driver will be
> reinitialized\n",
> > + vf->vf_id);
> > + } else {
> > + /* PF will add MAC rule for the VF */
> > + vf->pf_set_mac = true;
> > + dev_info(dev, "Setting MAC %pM on VF %d. VF driver will be
> reinitialized\n",
> > + mac, vf_id);
> > + }
> > +
> > + ice_reset_vf(vf, ICE_VF_RESET_NOTIFY);
> > + mutex_unlock(&vf->cfg_lock);
> > +
> > +out_put_vf:
> > + ice_put_vf(vf);
> > + return ret;
> > +}
>
> This is almost an exact copy of ice_set_vf_mac(). The only difference
> being the function arguments.
>
> Was there any reason to not use ice_set_vf_mac()? Why can't you pass the
> PF's netdev?
>
Or, refactor the set_vf_mac() into a function into a common one which takes a common set of arguments that can be derived in both the netdev op and devlink flow?
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