sfc: add support for devlink port_function_hw_addr_set in ef100

Using the builtin client handle id infrastructure, add support for
setting the mac address linked to mports in ef100. This implies to
execute an MCDI command for giving the address to the firmware for
the specific devlink port.
Signed-off-by: Alejandro Lucero <alejandro.lucero-palau@amd.com>
Reviewed-by: Jiri Pirko <jiri@nvidia.com>
Acked-by: Martin Habets <habetsm.xilinx@gmail.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>

drivers/net/ethernet/sfc/efx_devlink.c

@@ -109,6 +109,55 @@ static int efx_devlink_port_addr_get(struct devlink_port *port, u8 *hw_addr,
 	return rc;
 }
 
+static int efx_devlink_port_addr_set(struct devlink_port *port,
+				     const u8 *hw_addr, int hw_addr_len,
+				     struct netlink_ext_ack *extack)
+{
+	MCDI_DECLARE_BUF(inbuf, MC_CMD_SET_CLIENT_MAC_ADDRESSES_IN_LEN(1));
+	struct efx_devlink *devlink = devlink_priv(port->devlink);
+	struct mae_mport_desc *mport_desc;
+	efx_qword_t pciefn;
+	u32 client_id;
+	int rc;
+
+	mport_desc = container_of(port, struct mae_mport_desc, dl_port);
+
+	if (!ef100_mport_is_vf(mport_desc)) {
+		NL_SET_ERR_MSG_FMT(extack,
+				   "port mac change not allowed (mport: %u)",
+				   mport_desc->mport_id);
+		return -EPERM;
+	}
+
+	EFX_POPULATE_QWORD_3(pciefn,
+			     PCIE_FUNCTION_PF, PCIE_FUNCTION_PF_NULL,
+			     PCIE_FUNCTION_VF, mport_desc->vf_idx,
+			     PCIE_FUNCTION_INTF, PCIE_INTERFACE_CALLER);
+
+	rc = efx_ef100_lookup_client_id(devlink->efx, pciefn, &client_id);
+	if (rc) {
+		NL_SET_ERR_MSG_FMT(extack,
+				   "No internal client_ID for port (mport: %u)",
+				   mport_desc->mport_id);
+		return rc;
+	}
+
+	MCDI_SET_DWORD(inbuf, SET_CLIENT_MAC_ADDRESSES_IN_CLIENT_HANDLE,
+		       client_id);
+
+	ether_addr_copy(MCDI_PTR(inbuf, SET_CLIENT_MAC_ADDRESSES_IN_MAC_ADDRS),
+			hw_addr);
+
+	rc = efx_mcdi_rpc(devlink->efx, MC_CMD_SET_CLIENT_MAC_ADDRESSES, inbuf,
+			  sizeof(inbuf), NULL, 0, NULL);
+	if (rc)
+		NL_SET_ERR_MSG_FMT(extack,
+				   "sfc MC_CMD_SET_CLIENT_MAC_ADDRESSES mcdi error (mport: %u)",
+				   mport_desc->mport_id);
+
+	return rc;
+}
+
 #endif
 
 static int efx_devlink_info_nvram_partition(struct efx_nic *efx,
@@ -567,6 +616,7 @@ static const struct devlink_ops sfc_devlink_ops = {
 	.info_get			= efx_devlink_info_get,
 #ifdef CONFIG_SFC_SRIOV
 	.port_function_hw_addr_get	= efx_devlink_port_addr_get,
+	.port_function_hw_addr_set	= efx_devlink_port_addr_set,
 #endif
 };