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233 lines
7.9 KiB
C++
233 lines
7.9 KiB
C++
/* ------------------------------------------------------------------------ */
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/* Copyright 2002-2024, OpenNebula Project, OpenNebula Systems */
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/* */
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/* Licensed under the Apache License, Version 2.0 (the "License"); you may */
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/* not use this file except in compliance with the License. You may obtain */
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/* a copy of the License at */
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/* */
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/* http://www.apache.org/licenses/LICENSE-2.0 */
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/* */
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/* Unless required by applicable law or agreed to in writing, software */
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/* distributed under the License is distributed on an "AS IS" BASIS, */
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/* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. */
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/* See the License for the specific language governing permissions and */
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/* limitations under the License. */
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/* ------------------------------------------------------------------------ */
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#ifndef HOST_SHARE_PCI_H_
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#define HOST_SHARE_PCI_H_
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#include "ObjectXML.h"
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#include "Template.h"
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#include <time.h>
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#include <set>
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#include <map>
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/* -------------------------------------------------------------------------- */
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/* -------------------------------------------------------------------------- */
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/**
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* This class represents a PCI DEVICE list for the host. The list is in the
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* form:
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* <PCI>
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* <DOMAIN> PCI address domain
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* <BUS> PCI address bus
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* <SLOT> PCI address slot
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* <FUNCTION> PCI address function
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* <ADDRESS> PCI address, bus, slot and function
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* <VENDOR> ID of PCI device vendor
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* <DEVICE> ID of PCI device
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* <CLASS> ID of PCI device class
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* <VMID> ID using this device, -1 if free
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*
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* The monitor probe may report additional information such as VENDOR_NAME,
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* DEVICE_NAME, CLASS_NAME...
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*/
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class HostSharePCI : public Template
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{
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public:
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HostSharePCI() : Template(false, '=', "PCI_DEVICES") {};
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HostSharePCI(const HostSharePCI& src);
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virtual ~HostSharePCI()
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{
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HostSharePCI::clear();
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};
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/**
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* Builds the devices list from its XML representation. This function
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* is used when importing it from the DB.
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* @param node xmlNode for the template
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* @return 0 on success
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*/
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int from_xml_node(const xmlNodePtr node);
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/**
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* Test whether this PCI device set has the requested devices available.
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* @param devs list of requested devices by the VM.
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* @return true if all the devices are available.
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*/
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bool test(const std::vector<VectorAttribute *> &devs) const;
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/**
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* Assign the requested devices to the given VM. The assigned devices will
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* be labeled with the VM and the PCI attribute of the VM extended with
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* the address of the assigned devices.
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* @param devs list of requested PCI devices, will include address of
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* assigned devices.
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* @param vmid of the VM
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*
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* @return true if the devices where added
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*
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* NOTE THIS FUNCTION DOES NOT PERFORM ANY ROLLBACK
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*/
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bool add(std::vector<VectorAttribute *> &devs, int vmid);
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/**
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* Remove the VM assignment from the PCI device list
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*/
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void del(const std::vector<VectorAttribute *> &devs, int vmid);
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/**
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* Revert the VM assignment from the PCI device list. It copies
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* back the attributes from the previous PCI device
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*/
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void revert(std::vector<VectorAttribute *> &devs);
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/**
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* Updates the PCI list with monitor data, it will create or
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* remove PCIDevices as needed.
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*/
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void set_monitorization(Template& ht);
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void clear() override;
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/**
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* Prints the PCI device list to an output stream. This function is used
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* for logging purposes and *not* for generating DB content.
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*/
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friend std::ostream& operator<<(std::ostream& o, const HostSharePCI& p);
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HostSharePCI& operator=(const HostSharePCI& other);
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HostSharePCI& operator=(HostSharePCI&& other) noexcept;
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/**
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* Gets a 4 hex digits value from attribute
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* @param name of the attribute
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* @param pci_device VectorAttribute representing the device
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* @return the 0 if not found, -1 syntax error, >0 valid hex value
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*/
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static int get_pci_value(const char * name,
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const VectorAttribute * pci_device,
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unsigned int& value);
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/**
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* Sets the PCI device address in the Virtual Machine as follows;
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* - VM_DOMAIN: 0x0000
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* - VM_BUS: dbus or VM_BUS in PCI attribute
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* - VM_SLOT: PCI_ID + 1
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* - VM_FUNCTION: 0
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* - VM_ADDRESS: BUS:SLOT.0
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*
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* When the machine type is q35, SLOT needs to be 0, and devices are attached
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* to a different bus. Use param slot_index to select this behavior
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* - VM_SLOT: 0
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* - VM_BUS: PCI_ID + 1
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*
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* Cleans internal attributes:
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* - NUMA_NODE
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* - UUID
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* - BUS, SLOT, FUNCITION
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* - ADDRESS, PREV_ADDRESS
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* @param pci_device to set the address in
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* @param default_bus if not set in PCI attribute (PCI_PASSTHROUGH_BUS
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* in oned.conf)
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* @param bus_index when true devices uses slot = 0 and bus = pci_id + 1
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* @return -1 if wrong bus 0 on success
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*/
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static int set_pci_address(VectorAttribute * pci_device, const std::string& dbus,
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bool bus_index, bool clean);
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private:
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/**
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* Internal structure to represent PCI devices for fast look up and
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* update
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*/
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struct PCIDevice
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{
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PCIDevice(VectorAttribute * _attrs);
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PCIDevice(const PCIDevice& src);
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~PCIDevice() {};
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unsigned int vendor_id;
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unsigned int device_id;
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unsigned int class_id;
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int vmid;
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std::string address;
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VectorAttribute * attrs;
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};
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std::map<std::string, PCIDevice *> pci_devices;
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/**
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* Sets the internal class structures from the template
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*/
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void init();
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/**
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* Test if there is a suitable PCI device for the VM request. The test
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* is done using the VENDOR/DEVICE/CLASS attributes
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*
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* @param dev VM attribute that represents the decive request
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* @param addrs PCI addresses that should be considered in use
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*
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* @return true if the device can be allocated to this host
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*/
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bool test_by_name(const VectorAttribute *dev, std::set<std::string>& addrs) const;
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/**
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* Test if there is a suitable PCI device for the VM request. The test
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* is done using the a specific address
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*
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* @param device VM attribute that represents the decive request
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* @param addr the requested address
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*
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* @return PCI_ID of the tested device or -1 if no PCI found
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*/
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bool test_by_addr(const VectorAttribute *dev, const std::string& addr) const;
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/**
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* Allocates the given VM device using the VENDOR/DEVICE/CLASS attributes
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* @param device VM attribute that represents the decive request
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* @param vmid of the VM
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*/
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bool add_by_name(VectorAttribute *device, int vmid);
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/**
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* Allocates the given VM device using the SHORT_ADDRESS attribute
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* @param device VM attribute that represents the decive request
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* @param vmid of the VM
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*
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* @return pci_id of the allocated device or -1 if not allocated
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*/
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bool add_by_addr(VectorAttribute *device, const std::string& addr, int vmid);
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/**
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* Adds PCI attributes of the selected PCI to the VM PCI device
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*
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* @param device VM attribute
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* @param pci Host device
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* @param sp if true set the "PREVIOUS_ADDRESS" attribute
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*/
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void pci_attribute(VectorAttribute *device, PCIDevice *pci, bool sp);
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};
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#endif /*HOST_SHARE_PCI_H_*/
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