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From: Karthik Sundaravel <ksundara@redhat.com>
To: jesse.brandeburg@intel.com,
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Subject: [PATCH v6] ice: Add get/set hw address for VFs using devlink commands
Date: Thu, 21 Mar 2024 13:46:25 +0530
Message-Id: <20240321081625.28671-2-ksundara@redhat.com>
In-Reply-To: <20240321081625.28671-1-ksundara@redhat.com>
References: <20240321081625.28671-1-ksundara@redhat.com>
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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@redhat.com>
---
 drivers/net/ethernet/intel/ice/ice_devlink.c | 66 +++++++++++++++++++-
 drivers/net/ethernet/intel/ice/ice_sriov.c   | 62 ++++++++++++++++++
 drivers/net/ethernet/intel/ice/ice_sriov.h   |  8 +++
 3 files changed, 135 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/intel/ice/ice_devlink.c b/drivers/net/ethernet/intel/ice/ice_devlink.c
index 80dc5445b50d..35c7cfc8ce9a 100644
--- a/drivers/net/ethernet/intel/ice/ice_devlink.c
+++ b/drivers/net/ethernet/intel/ice/ice_devlink.c
@@ -1576,6 +1576,69 @@ void ice_devlink_destroy_pf_port(struct ice_pf *pf)
 	devlink_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);
+	if (!vf) {
+		NL_SET_ERR_MSG_MOD(extack, "Unable to get the vf");
+		return -EINVAL;
+	}
+	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;
+	u8 mac[ETH_ALEN];
+	u16 vf_id;
+
+	pf = devlink_priv(devlink);
+	pci_vf = &attrs->pci_vf;
+	vf_id = pci_vf->vf;
+
+	ether_addr_copy(mac, hw_addr);
+
+	return ice_set_vf_fn_mac(pf, vf_id, mac);
+}
+
+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
@@ -1611,7 +1674,8 @@ int ice_devlink_create_vf_port(struct ice_vf *vf)
 	devlink_port_attrs_set(devlink_port, &attrs);
 	devlink = priv_to_devlink(pf);
 
-	err = devlink_port_register(devlink, devlink_port, vsi->idx);
+	err = devlink_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 31314e7540f8..b1e5cd188fd7 100644
--- a/drivers/net/ethernet/intel/ice/ice_sriov.c
+++ b/drivers/net/ethernet/intel/ice/ice_sriov.c
@@ -1216,6 +1216,68 @@ 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, 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;
+}
+
 /**
  * ice_set_vf_mac
  * @netdev: network interface device structure
diff --git a/drivers/net/ethernet/intel/ice/ice_sriov.h b/drivers/net/ethernet/intel/ice/ice_sriov.h
index 346cb2666f3a..11cc522b1d9f 100644
--- a/drivers/net/ethernet/intel/ice/ice_sriov.h
+++ b/drivers/net/ethernet/intel/ice/ice_sriov.h
@@ -28,6 +28,7 @@
 #ifdef CONFIG_PCI_IOV
 void ice_process_vflr_event(struct ice_pf *pf);
 int ice_sriov_configure(struct pci_dev *pdev, int num_vfs);
+int ice_set_vf_fn_mac(struct ice_pf *pf, u16 vf_id, u8 *mac);
 int ice_set_vf_mac(struct net_device *netdev, int vf_id, u8 *mac);
 int
 ice_get_vf_cfg(struct net_device *netdev, int vf_id, struct ifla_vf_info *ivi);
@@ -76,6 +77,13 @@ ice_sriov_configure(struct pci_dev __always_unused *pdev,
 	return -EOPNOTSUPP;
 }
 
+static inline int
+ice_set_vf_fn_mac(struct ice_pf __always_unused *pf,
+		  u16 __always_unused vf_id, u8 __always_unused *mac)
+{
+	return -EOPNOTSUPP;
+}
+
 static inline int
 ice_set_vf_mac(struct net_device __always_unused *netdev,
 	       int __always_unused vf_id, u8 __always_unused *mac)
-- 
2.39.3 (Apple Git-146)