CN1740997A - Network equipment and method for distributing its peripheral device interconnection resources - Google Patents
Network equipment and method for distributing its peripheral device interconnection resources Download PDFInfo
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Abstract
The distribution method of PCI resource in network equipment includes the following steps: defining position mark of PCI interface in bus framework; homogeneously distributing PCI resource to PCI interface and making the position mark and distributed PCI resource have fixed correspondent relationship. Said invention also discloses a network equipment using the above-mentioned method.
Description
Technical field
The present invention relates to be used for the processor system of the network equipment, relate in particular to the network equipment of distribution method and this method of application of peripheral device interconnection resources in a kind of network equipment.
Background technology
Networks development is had higher requirement to the function of the network equipment, and the application of CPU (Central ProcessUnit, central processing unit) system more and more widely.In the cpu system of the network equipment, PCI (Peripheral Component Interconnect, peripheral device interconnection) is the bus structure that generally adopt.Pci bus is a kind of 32/64 bus of high-performance with multichannel address wire and data line, uses as interconnection structure between highly integrated peripheral controllers spare, peripheral plug-in card and processor/storer.
The prerequisite of PCI equipment operate as normal is to obtain correct initialization, and the of paramount importance work of system is for PCI devices allocation resource in initialization procedure, comprises Bus number resource, address resource and interrupt resources.The address resource of PCI equipment mainly is meant configuration space, Memory (internal memory) space and I/O (input and output) space of PCI equipment, supplies the driver of CPU and this equipment to come opertaing device work.
In the prior art, the PCI resource is demand assigned normally.After the system start-up pci bus is carried out poll, for the equipment that finds distributes the PCI resource successively.Wherein the PCI address resource is the address space range of the inner necessary being of cpu system, to each PCI equipment that finds, is allocated to the corresponding space of this equipment according to the size of Memory space that is obtained by this equipment and input/output space from address space range.In other words, the position of the address space that PCI equipment is assigned with is relevant to the order of this equipment with systematic search, in system, insert, extracted the Memory space of other equipment or certain equipment and variation has taken place the size of input/output space, then search order can respective change in the position of thereafter PCI device address space, also is like this to the address assignment of hot plug PCI equipment.
The configuration space of PCI equipment, Memory space and input/output space are arranged in the physical address space of cpu system, and for the consideration of security, most operating systems do not allow the driver of equipment directly to visit physical address space.Operating system provides memory-mapped mechanism, physical memory is mapped as virtual memory after, device driver can the accesses virtual address space.
Memory-mapped is carried out according to the address, needs to carry out again memory-mapped after physical address space changes, and this moment, driver must carry out corresponding modify ability operate as normal to the virtual address space of its visit.Therefore, resource allocation methods of the prior art has caused address space to be in quick condition, especially for the system that supports hot plug, has caused the very big inconvenience of driver memory management.
Disclose a kind of method among the Chinese patent CN1601498A and solved the problems referred to above to PCI adapter allocate memory address, according to the related configuration information of identifier of each groove position, PCI adapter place, to the non-allocate memory equably of above-mentioned PCI adapter address realm.Distribute the address for PCI adapter in this way and be applicable to computer system, because the PCI adapter kind that computer system can be expanded is a lot, the required storage space of different types of adapter has very big difference, adopts non-homogeneous to distribute and can save the storage space of reserving into PCI adapter to a great extent.And; expansion slot position in the computer system will be waited until the user and be determined its purposes; select the adapter of various different vendors and model according to self applied environment of user; the needed storage space of the adapter of these same types also often can be very different, and this moment, the allocation of space of non-homogeneous also can solve the problem that resources allocation that computer system purposes difference causes is given priority to.
But for the network equipment with expansion PCI groove position, the sort memory space allocation method is then also inapplicable.With different in the computer system, PCI groove position in the network equipment all is used for the expanding communication port basically, and the communication capacity that each groove position has mainly depends on the backboard of equipment, the total bandwidth of the expansion card upper port that same equipment is supported in the practical application is basic identical, in the network equipment, require simultaneously the expansion card can both operate as normal usually in each groove position, the address space of distributing to each groove position in this case should satisfy the needs of all expansion cards, thereby the non-homogeneous of address space distributes the waste that only may increase storage space.
Summary of the invention
The present invention will solve is that being not easy to of causing of PCI equipment floats in the prior art address space managed and the problem of the waste of storage space that causes to the non-homogeneous allocate memory of PCI equipment space.
The network equipment of the present invention has at least one pci bus and at least one pci interface, and the distribution method of its peripheral device interconnection PCI resource may further comprise the steps:
Determine the station location marker of pci interface in bus architecture;
Distribute the PCI resource equably to pci interface, make station location marker and the PCI resource that is assigned with have fixing corresponding relation.
Preferably, after pci interface homogeneous Resources allocation, also comprising:
The PCI equipment that connects on the search pci interface;
In the PCI scope of resource of the station location marker correspondence of pci interface, for the PCI equipment secondary that searches carries out resources allocation.
Preferably, described method also comprises: when inserting hot plug PCI equipment in pci interface, in the corresponding PCI scope of resource of this interface position sign, distribute for the equipment that inserts carries out secondary resource.
Preferably, described PCI resource comprises Bus number, interrupt number and physical address space; Described physical address space comprises configuration space, internal memory Memory space, input and output input/output space.
Preferably, described method also comprises: when the PCI equipment that carries out resources allocation is bridge device, and the downstream bus that is assigned with for the facility registration that connects on this bridge device middle and lower reaches bus number.
Preferably, for also comprising after the PCI devices allocation resource that searches:
Configuration space, Memory space and the input/output space of distributing to PCI equipment are mapped as virtual address space;
In the register in this PCI equipment disposition space, be written as the resource of its distribution.
Preferably, described pci interface is the PCI slot, and described PCI equipment is a communication port;
Described method also comprises:
Set up the groove number of PCI slot and the port numbers and the port uniquely identified corresponding relation of communication port, and the port unique identification is connected the corresponding relation of pci interface station location marker with this communication port; Described port unique identification is used for identification communication port uniquely;
Driver has corresponding port uniquely identified communication port by providing groove number and port numbers to visit.
The present invention also provides a kind of network equipment with at least one pci bus and at least one pci interface, comprises location resource module, device search module and resource distribution module, wherein:
The location resource module is used for storing the PCI scope of resource that homogeneous is distributed to each pci interface, and carry out the position of homogeneous basic of distribution pci interface in bus architecture;
The device search module is used for searching for the PCI equipment that connects on the pci interface;
Resource distribution module is searched the PCI scope of resource of the pci interface of storing in the location resource module that is connected with described PCI equipment, distributes for described PCI equipment carries out secondary resource in this scope.
Preferably, described PCI resource comprises Bus number, interrupt number and physical address space; Described physical address space comprises configuration space, internal memory Memory space, input and output input/output space.
Preferably, the described network equipment also comprises address mapping module, is used for configuration space, Memory space and the input/output space of PCI equipment are mapped as virtual address space.
The present invention distributes the resource of homogeneous according to the position of pci interface in bus architecture for it, the PCI scope of resource that the order equipment on certain pci interface that is connected is fixed all the time, and each pci interface has the scope of resource of equal size, thereby make the PCI equipment that is connected on the same interface can be assigned to fixing address space, simplified the memory management of driver; The homogeneous of address space distribution simultaneously makes expansion card access same resources allocation at each groove potential energy, has avoided the waste of storage space;
And then, the present invention carries out secondary resource according to the communication port that connects on the pci interface and distributes, by setting up the corresponding relation of groove number and port numbers and pci interface station location marker, driver can come locating resource by groove number and port numbers, makes existing driver can be applicable to the present invention without modification.
Description of drawings
Fig. 1 is the PCI framework that comprises the pci interface with station location marker of the present invention;
Fig. 2 is the process flow diagram of PCI resource allocation methods of the present invention;
Fig. 3 is the structural representation of the network equipment of the present invention.
Embodiment
Pci bus architecture is a kind of architecture of hierarchy type, and as shown in Figure 1, CPU is connected to main pci bus by the Host-PCI bridge---on the bus 0.Except that the M of position, position 1 to position N is each pci interface on the bus 0, and pci interface is to wait until the connecting interface that inserts PCI equipment on the bus, normally is used to insert the PCI slot of expansion card, also may be the connecting interface of other accord with PCI Specification.On the M of position, the PCI bridge couples together bus L and bus 0, and this moment, bus 0 was the upstream bus of PCI bridge, and bus L is the downstream bus of PCI bridge.Position (N+1) to position (N+K) is the pci interface on the bus L.Each idle pci interface can be used for connecting PCI equipment among the figure, can be single PCI equipment, also can be the combination that surpasses 1 PCI equipment, can also be the PCI bridge device, promptly comprises the PCI bridge and be connected with PCI equipment on its downstream bus.
Be understood that the PCI framework among Fig. 1 is a kind of basic PCI architecture, in concrete the application, can make amendment or additions and deletions, to obtain any PCI framework that suits the requirements to the framework among Fig. 1.The framework that adopts Fig. 1 among the present invention describes the station location marker of pci interface, should be with the framework of Fig. 1 as limitation of the invention.
The bridge that is used to connect the upstream and downstream pci bus among Fig. 1 can also be HT (Hyper Transport, a super transmission) bridge, perhaps other accord with PCI Specification and have the bridge of said function.
Among the present invention, station location marker is used for the position of unique demarcation pci interface in pci bus architecture, and the PCI resources allocation is carried out according to station location marker.By the station location marker of a PCI equipment, can learn the pci interface of its connection, and the position of this pci interface in bus architecture.
Figure 2 shows that the flow process of resource allocation methods of the present invention.At step S210, for it station location marker is set according to the position of pci interface in bus architecture.
At step S220, distribute the PCI resource to each pci interface homogeneous, and the PCI resource that makes the station location marker of each pci interface get with it has fixing corresponding relation.It is relation one to one each other between the station location marker of pci interface, pci interface, the PCI scope of resource three that certain is fixing.
Pci interface PCI slot normally in the practical application, and device driver normally number visits PCI equipment in this slot according to the groove of slot.Why adopting station location marker among the present invention and do not adopt the groove of PCI slot number to carry out resources allocation, is because groove number can freely be defined by the user, can't number set up fixed correspondence between slot and the PCI scope of resource by groove like this.
The PCI resource comprises Bus number, interrupt number and physical address space, and wherein, Bus number is used for distributing downstream bus number to the bridge that connects on the pci interface; Interrupt number uses when system's application is interrupted for the PCI equipment that connects.Physical address space comprises configuration space, Memory space, input/output space, wherein configuration space comprises information, state and the configuration register of PCI equipment, system discerns the employed interrupt number of duty, configuration device of PCI equipment, opertaing device, the plot of physical address space etc. by these registers, and bridge device is also needed to dispose downstream bus number.
At step S230, the PCI equipment that connects on all pci interfaces in the search PCI system.Search to PCI equipment is carried out in system powers on the initialized process in back, can adopt the method for prior art to search for PCI equipment among the present invention, repeats no more herein.
At step S240, if pci interface is the PCI slot, and the PCI equipment that the PCI slot connects is communication port, then adopt the port unique identification to come in total system, to discern this communication port uniquely, promptly make slot groove that the port unique identification is connected with this communication port number have corresponding relation with the port numbers of this communication port in this groove.Wherein, PCI slot groove number for the user can oneself definition the groove identifier, and port numbers connects call number on the slot for this communication port at it, identifies this communication port on this slot in all communication port uniquely.
This corresponding relation should satisfy two conditions: the first can obtain this port unique identification uniquely by groove number and port numbers; It two is also can obtain groove number and port numbers uniquely by the port unique identification.
Simultaneously, also need to set up the corresponding relation of the station location marker of the connected pci interface of port unique identification in this step.
At step S250, when on pci interface, searching PCI equipment, in the PCI scope of resource of the station location marker correspondence of this pci interface, promptly in the PCI scope of resource that in step S220, distributes,, distributes the PCI equipment that searches for carrying out secondary resource for this pci interface.
Because the equipment that pci interface connected among the present invention comprises single PCI equipment, surpasses the combination or the PCI bridge device of a PCI equipment, and device driver will be operated at each PCI equipment self, so need carry out the secondary distribution of resource to the PCI equipment that pci interface connects.
When secondary distribution, can the PCI scope of resource of this pci interface correspondence be divided equally to the equipment that connects according to the quantity of institute's connection device, also can be its distribution, perhaps adopt other can satisfy the required distribution method of equipment by consumer premise according to the resource quantity that each equipment specifically needs.Because the scope of resource of this pci interface correspondence is fixed, as long as these equipment still are connected on this pci interface, no matter any variation takes place in the equipment situation during initialization on other pci interfaces, when redistributing resource, need only and still adopt identical secondary distribution method, these equipment still can obtain and former identical PCI resource.
At step S260, if system detects the PCI equipment that has inserted hot plug on certain pci interface, the PCI equipment that then is insertion carries out the secondary distribution of resource in the PCI scope of resource of the station location marker correspondence of this pci interface.Identical among the secondary distribution method of resource and the step S250 in this step, no longer repeat.
The system of support hot plug inserts PCI equipment in operational process after, can receive the interruption that reports, thereby trigger the secondary distribution process of PCI resource.
At step S270, if the hot plug PCI equipment that inserts among PCI equipment that searches among the step S250 or the step S260 is bridge device, then be connected on the downstream bus of this bridge device jackshaft PCI equipment also by secondary distribution the PCI resource.Should be this downstream bus distribution bus number this moment, and for being connected the facility registration downstream bus number on this downstream bus, so that follow-up visit to this equipment.
At step S280, configuration space, Memory space and the input/output space of distributing to PCI equipment are mapped as virtual address space, and the register to PCI equipment disposition space carries out write operation, be recorded as the resource of this devices allocation, the plot of the plot in interrupt number, Memory space, input/output space address etc. for example, and be the downstream bus of bridge device configuration number.Wherein, the plot in Memory space, the plot of input/output space address are write the base register of configuration space, interrupt number is write the interrupt line register, if bridge device is then with downstream bus write bus register.
The driver of PCI equipment can not directly be visited Memory space and the input/output space that is arranged in physical address space usually, and need come the dereference physical address space by the virtual address space of setting up after the memory-mapped.
At step S290, if the port unique identification of setting up for communication port in step S240, then the port numbers of groove that driver can be by the PCI slot number and communication port visits certain communication port.Can obtain the port unique identification of this communication port from groove number and port numbers, can learn that by the port unique identification this communication port is positioned at which pci interface and the index on this pci interface, thereby find the particular location of this communication port in the PCI framework, driver can be by controlling this equipment work to the read-write of its virtual address space afterwards.
Figure 3 shows that the structural representation of the network equipment of using above-mentioned PCI resource allocation methods, wherein the network equipment has a pci bus and at least one pci interface.Device search module 320, resource distribution module 330 and address mapping module 340 serial connections, and be connected to pci interface by bus respectively; Location resource module 310 is connected with resource distribution module 330; Be connected with PCI equipment on certain pci interface.
PCI framework according to cpu system in the network equipment carries out resources allocation, according to the position of pci interface in the PCI framework PCI resource is distributed to each pci interface equably, and the corresponding relation of pci interface with the scope of resource of being got is stored in the location resource module 310.
The PCI resource comprises Bus number, interrupt number and physical address space; Wherein physical address space comprises configuration space, internal memory Memory space and input and output input/output space.
The equipment that when device search module 320 inserts PCI equipment when network equipment power-up initializing or on the pci interface of hot plug in the network equipment operational process pci interface is connected is searched for.
To the PCI equipment that device search module 320 searches, resource distribution module 330 finds the PCI scope of resource that this equipment connects the pci interface correspondence from location resource module 310, distributes for the equipment that searches carries out secondary resource in this scope.Identical among the step S250 in the method that secondary resource distributes and the resource allocation methods of the present invention, no longer repetition.
The configuration space of 320 pairs of PCI equipment of device search module carries out read-write operation, the scope of resource of distributing to this PCI equipment is write in the register of its configuration space, comprise the plot in interrupt number, Memory space and the plot of input/output space etc., and the downstream bus of bridge device number.
Memory space and input/output space that address mapping module 340 is distributed to PCI equipment with resource distribution module 330 are mapped as virtual memory.
After using the present invention, after determining, just arranges the PCI of the network equipment framework resource space of each pci interface properly.Even even this pci interface does not have this pci interface of access device also not show as concrete hardware in product design at present, but might expand out future, all distribute fixing space to it.And the physical address space of PCI equipment and the mapping of virtual address space also can be carried out unified planning, follow-up can conducting interviews by the data structure of an overall situation.
Thereby, before using the present invention, note not only will satisfying the needs of current system, and will reserve enough following extended capabilities, to adapt to performance and the quantitative requirement that the user increases to the design of network equipment PCI framework.
As seen, the present invention not only can avoid initialization, especially the address resource that causes of hot plug floats, simplified the management of driver, and by setting up the corresponding relation of groove number and port numbers and pci interface station location marker, driver can come locating resource by groove number and port numbers, has avoided the modification to existing driver.
Above-described embodiment of the present invention does not constitute the qualification to protection domain of the present invention.Any any modification of being done within the spirit and principles in the present invention, be equal to and replace and improvement etc., all should be included within the claim protection domain of the present invention.
Claims (10)
1. the distribution method of peripheral device interconnection PCI resource in the network equipment, this network equipment has at least one pci bus and at least one pci interface, it is characterized in that, may further comprise the steps:
Determine the station location marker of pci interface in bus architecture;
Distribute the PCI resource equably to pci interface, make station location marker and the PCI resource that is assigned with have fixing corresponding relation.
2. according to the distribution method of the described PCI resource of claim 1, it is characterized in that, after pci interface homogeneous Resources allocation, also comprising:
The PCI equipment that connects on the search pci interface;
In the PCI scope of resource of the station location marker correspondence of pci interface, for the PCI equipment secondary that searches carries out resources allocation.
3. according to the distribution method of the described PCI resource of claim 2, it is characterized in that, described method also comprises: when inserting hot plug PCI equipment in pci interface, in the corresponding PCI scope of resource of this interface position sign, distribute for the equipment that inserts carries out secondary resource.
4. according to the distribution method of the described PCI resource of claim 3, it is characterized in that: described PCI resource comprises Bus number, interrupt number and physical address space; Described physical address space comprises configuration space, internal memory Memory space, input and output input/output space.
5. according to the distribution method of the described PCI resource of claim 4, it is characterized in that described method also comprises: when the PCI equipment that carries out resources allocation is bridge device, the downstream bus that is assigned with for the facility registration that connects on this bridge device middle and lower reaches bus number.
6. according to the distribution method of the described PCI resource of claim 4, it is characterized in that, for also comprising after the PCI devices allocation resource that searches:
Configuration space, Memory space and the input/output space of distributing to PCI equipment are mapped as virtual address space;
In the register in this PCI equipment disposition space, be written as the resource of its distribution.
7. according to the distribution method of any described PCI resource of claim 4 to 6, it is characterized in that: described pci interface is the PCI slot, and described PCI equipment is a communication port;
Described method also comprises:
Set up the groove number of PCI slot and the port numbers and the port uniquely identified corresponding relation of communication port, and the port unique identification is connected the corresponding relation of pci interface station location marker with this communication port; Described port unique identification is used for identification communication port uniquely;
Driver has corresponding port uniquely identified communication port by providing groove number and port numbers to visit.
8. a network equipment has at least one pci bus and at least one pci interface, it is characterized in that, comprises location resource module, device search module and resource distribution module, wherein:
The location resource module is used for storing the PCI scope of resource that homogeneous is distributed to each pci interface, and carry out the position of homogeneous basic of distribution pci interface in bus architecture;
The device search module is used for searching for the PCI equipment that connects on the pci interface;
Resource distribution module is searched the PCI scope of resource of the pci interface of storing in the location resource module that is connected with described PCI equipment, distributes for described PCI equipment carries out secondary resource in this scope.
9. according to the described network equipment of claim 8, it is characterized in that: described PCI resource comprises Bus number, interrupt number and physical address space; Described physical address space comprises configuration space, internal memory Memory space, input and output input/output space.
10. according to the described network equipment of claim 9, it is characterized in that the described network equipment also comprises address mapping module, be used for configuration space, Memory space and the input/output space of PCI equipment are mapped as virtual address space.
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| CNB2005101035511A CN1323362C (en) | 2005-09-21 | 2005-09-21 | Network equipment and method for distributing its peripheral device interconnection resources |
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| WO2008025202A1 (en) * | 2006-08-25 | 2008-03-06 | Huawei Technologies Co., Ltd. | A method, system and device for obtaining physical information of a single board |
| CN101226515A (en) * | 2008-01-31 | 2008-07-23 | 华为技术有限公司 | Method and apparatus for distributing resource of hot-plug bus interface |
| CN101488118B (en) * | 2008-01-18 | 2011-08-10 | 株式会社日立制作所 | Management method of combined computer system and combined computer system |
| WO2012163231A1 (en) * | 2011-11-18 | 2012-12-06 | 华为技术有限公司 | Address resource allocation method and storage |
| CN102117259B (en) * | 2009-12-31 | 2014-07-09 | 成都市华为赛门铁克科技有限公司 | Method and device for allocating and processing address space resource |
| CN106126460A (en) * | 2016-06-16 | 2016-11-16 | 迈普通信技术股份有限公司 | Hot-plug equipment reserves resource allocation methods, device and system |
| WO2017121141A1 (en) * | 2016-01-15 | 2017-07-20 | 华为技术有限公司 | Hot plug method, host controller, host and pcie bridge device |
| CN107977335A (en) * | 2017-10-24 | 2018-05-01 | 北京全路通信信号研究设计院集团有限公司 | Method and device for accessing resources |
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| CN113067912A (en) * | 2021-03-11 | 2021-07-02 | 山东英信计算机技术有限公司 | Method, system and device for allocating resource addresses of PCI (peripheral component interconnect) equipment |
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| KR20030065064A (en) * | 2002-01-29 | 2003-08-06 | 삼성전자주식회사 | Method for managing domain name |
| US7200687B2 (en) * | 2003-09-25 | 2007-04-03 | International Business Machines Coporation | Location-based non-uniform allocation of memory resources in memory mapped input/output fabric |
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| CN101488118B (en) * | 2008-01-18 | 2011-08-10 | 株式会社日立制作所 | Management method of combined computer system and combined computer system |
| CN101226515A (en) * | 2008-01-31 | 2008-07-23 | 华为技术有限公司 | Method and apparatus for distributing resource of hot-plug bus interface |
| CN101226515B (en) * | 2008-01-31 | 2012-10-17 | 成都市华为赛门铁克科技有限公司 | Method and apparatus for distributing resource of hot-plug bus interface |
| CN102117259B (en) * | 2009-12-31 | 2014-07-09 | 成都市华为赛门铁克科技有限公司 | Method and device for allocating and processing address space resource |
| WO2012163231A1 (en) * | 2011-11-18 | 2012-12-06 | 华为技术有限公司 | Address resource allocation method and storage |
| US10423560B2 (en) | 2016-01-15 | 2019-09-24 | Huawei Technologies Co., Ltd. | Hot plug method, host controller, host, and PCIE bridge device |
| WO2017121141A1 (en) * | 2016-01-15 | 2017-07-20 | 华为技术有限公司 | Hot plug method, host controller, host and pcie bridge device |
| CN106126460A (en) * | 2016-06-16 | 2016-11-16 | 迈普通信技术股份有限公司 | Hot-plug equipment reserves resource allocation methods, device and system |
| CN106126460B (en) * | 2016-06-16 | 2018-12-11 | 迈普通信技术股份有限公司 | Hot-plug equipment reserves resource allocation methods, device and system |
| CN107977335A (en) * | 2017-10-24 | 2018-05-01 | 北京全路通信信号研究设计院集团有限公司 | Method and device for accessing resources |
| CN111273755A (en) * | 2018-12-04 | 2020-06-12 | 沃尔缇夫能源系统公司 | Slot setting method and device |
| CN110502282A (en) * | 2019-08-15 | 2019-11-26 | 苏州浪潮智能科技有限公司 | Loading method, device, equipment and the readable storage medium storing program for executing of multichannel NTB card |
| CN113067912A (en) * | 2021-03-11 | 2021-07-02 | 山东英信计算机技术有限公司 | Method, system and device for allocating resource addresses of PCI (peripheral component interconnect) equipment |
| CN113067912B (en) * | 2021-03-11 | 2023-04-07 | 山东英信计算机技术有限公司 | Method, system and device for allocating resource addresses of PCI (peripheral component interconnect) equipment |
| US11924116B2 (en) | 2021-03-11 | 2024-03-05 | Shandong Yingxin Computer Technologies Co., Ltd. | Resource address allocation method, system and apparatus for PCI device |
| CN114785745A (en) * | 2022-03-23 | 2022-07-22 | 新华三技术有限公司合肥分公司 | Method for configuring equipment resources and switch |
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