go.ligato.io/vpp-agent/v3@v3.5.0/plugins/vpp/ifplugin/vppcalls/vpp2202/vmxnet3_vppcalls.go (about)

     1  //  Copyright (c) 2022 Cisco and/or its affiliates.
     2  //
     3  //  Licensed under the Apache License, Version 2.0 (the "License");
     4  //  you may not use this file except in compliance with the License.
     5  //  You may obtain a copy of the License at:
     6  //
     7  //      http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  //  Unless required by applicable law or agreed to in writing, software
    10  //  distributed under the License is distributed on an "AS IS" BASIS,
    11  //  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  //  See the License for the specific language governing permissions and
    13  //  limitations under the License.
    14  
    15  package vpp2202
    16  
    17  import (
    18  	"fmt"
    19  
    20  	"github.com/pkg/errors"
    21  
    22  	"go.ligato.io/vpp-agent/v3/plugins/vpp"
    23  	"go.ligato.io/vpp-agent/v3/plugins/vpp/binapi/vpp2202/interface_types"
    24  	vpp_vmxnet3 "go.ligato.io/vpp-agent/v3/plugins/vpp/binapi/vpp2202/vmxnet3"
    25  	"go.ligato.io/vpp-agent/v3/plugins/vpp/ifplugin/vppcalls"
    26  	ifs "go.ligato.io/vpp-agent/v3/proto/ligato/vpp/interfaces"
    27  )
    28  
    29  func (h *InterfaceVppHandler) AddVmxNet3(ifName string, vmxNet3 *ifs.VmxNet3Link) (swIdx uint32, err error) {
    30  	if h.vmxnet3 == nil {
    31  		return 0, errors.WithMessage(vpp.ErrPluginDisabled, "wmxnet")
    32  	}
    33  
    34  	var pci uint32
    35  	pci, err = derivePCI(ifName)
    36  	if err != nil {
    37  		return 0, err
    38  	}
    39  
    40  	req := &vpp_vmxnet3.Vmxnet3Create{
    41  		PciAddr: pci,
    42  	}
    43  	// Optional arguments
    44  	if vmxNet3 != nil {
    45  		req.EnableElog = int32(boolToUint(vmxNet3.EnableElog))
    46  		req.RxqSize = uint16(vmxNet3.RxqSize)
    47  		req.TxqSize = uint16(vmxNet3.TxqSize)
    48  	}
    49  
    50  	reply := &vpp_vmxnet3.Vmxnet3CreateReply{}
    51  	if err = h.callsChannel.SendRequest(req).ReceiveReply(reply); err != nil {
    52  		return 0, errors.Errorf(err.Error())
    53  	}
    54  
    55  	return uint32(reply.SwIfIndex), h.SetInterfaceTag(ifName, uint32(reply.SwIfIndex))
    56  }
    57  
    58  func (h *InterfaceVppHandler) DeleteVmxNet3(ifName string, ifIdx uint32) error {
    59  	if h.vmxnet3 == nil {
    60  		return errors.WithMessage(vpp.ErrPluginDisabled, "wmxnet")
    61  	}
    62  
    63  	req := &vpp_vmxnet3.Vmxnet3Delete{
    64  		SwIfIndex: interface_types.InterfaceIndex(ifIdx),
    65  	}
    66  	reply := &vpp_vmxnet3.Vmxnet3DeleteReply{}
    67  	if err := h.callsChannel.SendRequest(req).ReceiveReply(reply); err != nil {
    68  		return errors.Errorf(err.Error())
    69  	}
    70  
    71  	return h.RemoveInterfaceTag(ifName, ifIdx)
    72  }
    73  
    74  func derivePCI(ifName string) (uint32, error) {
    75  	var function, slot, bus, domain, pci uint32
    76  
    77  	numLen, err := fmt.Sscanf(ifName, "vmxnet3-%x/%x/%x/%x", &domain, &bus, &slot, &function)
    78  	if err != nil {
    79  		err = errors.Errorf("cannot parse PCI address from the vmxnet3 interface name %s: %v", ifName, err)
    80  		return 0, err
    81  	}
    82  	if numLen != 4 {
    83  		err = errors.Errorf("cannot parse PCI address from the interface name %s: expected 4 address elements, received %d",
    84  			ifName, numLen)
    85  		return 0, err
    86  	}
    87  
    88  	pci |= function << 29
    89  	pci |= slot << 24
    90  	pci |= bus << 16
    91  	pci |= domain
    92  
    93  	return pci, nil
    94  }
    95  
    96  // dumpVmxNet3Details dumps VmxNet3 interface details from VPP and fills them into the provided interface map.
    97  func (h *InterfaceVppHandler) dumpVmxNet3Details(interfaces map[uint32]*vppcalls.InterfaceDetails) error {
    98  	if h.vmxnet3 == nil {
    99  		// no-op when disabled
   100  		return nil
   101  	}
   102  
   103  	reqCtx := h.callsChannel.SendMultiRequest(&vpp_vmxnet3.Vmxnet3Dump{})
   104  	for {
   105  		vmxnet3Details := &vpp_vmxnet3.Vmxnet3Details{}
   106  		stop, err := reqCtx.ReceiveReply(vmxnet3Details)
   107  		if stop {
   108  			break // Break from the loop.
   109  		}
   110  		if err != nil {
   111  			return fmt.Errorf("failed to dump VmxNet3 tunnel interface details: %v", err)
   112  		}
   113  		_, ifIdxExists := interfaces[uint32(vmxnet3Details.SwIfIndex)]
   114  		if !ifIdxExists {
   115  			continue
   116  		}
   117  		interfaces[uint32(vmxnet3Details.SwIfIndex)].Interface.Link = &ifs.Interface_VmxNet3{
   118  			VmxNet3: &ifs.VmxNet3Link{
   119  				RxqSize: uint32(vmxnet3Details.RxCount),
   120  				TxqSize: uint32(vmxnet3Details.TxCount),
   121  			},
   122  		}
   123  		interfaces[uint32(vmxnet3Details.SwIfIndex)].Interface.Type = ifs.Interface_VMXNET3_INTERFACE
   124  		interfaces[uint32(vmxnet3Details.SwIfIndex)].Meta.Pci = vmxnet3Details.PciAddr
   125  	}
   126  	return nil
   127  }