CN103873489A - Device sharing system with PCIe interface and device sharing method with PCIe interface - Google Patents
Device sharing system with PCIe interface and device sharing method with PCIe interface Download PDFInfo
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- CN103873489A CN103873489A CN201210525640.5A CN201210525640A CN103873489A CN 103873489 A CN103873489 A CN 103873489A CN 201210525640 A CN201210525640 A CN 201210525640A CN 103873489 A CN103873489 A CN 103873489A
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Abstract
A device sharing system with a PCIe interface runs in a request server and a shared server which provides a PCIe interface device as a to-be-shared device. A shared drive acquires the access of a virtual machine in the request server to the to-be-shared device, and a shared manager returns the model of the to-be-shared device and the memory address of a base register of a PCIe of the to-be-shared device to a shared agent according to the access. The shared drive establishes a first window in a specified storage space of the virtual machine and maps the first window to the memory of the base register of the PCIe of the to-be-shared device. The shared manager establishes a second window in a storage device of the shared server and maps the second window to the specified storage space of the virtual machine. The invention further provides a device sharing method with a PCIe interface. By adopting the device sharing system and the device sharing method of the invention, device sharing with a PCIe interface among a plurality of servers can be realized.
Description
Technical field
The present invention relates to hardware technology of sharing, relate in particular to a kind of device shared system and method with quick peripheral component interconnection PCIe interface.
Background technology
Input-output equipment can be used to share between multiple devices, but, in the time that a device need to be shared the input-output equipment of other devices, often need to revise the corresponding driver of this device local side.For example, take network interface card as example, when server wants is used the network interface card on other servers to realize transfer of data, need to use specific driver, must cause modifying and could realizing calling dissimilar network interface card the NIC driver of local side, and the final device with PCIe interface of realizing shares, so, must cause the service efficiency of network interface card low.Or, if this server is not modified to the NIC driver of local side, so, must only can use the network interface card corresponding with this NIC driver, must make the network interface card type that can call be very restricted, thereby affect network interface card sharing between multiple devices.
Summary of the invention
In view of above content, be necessary to provide a kind of device shared system and method for the PCIe of having interface, can realize and between multiple devices, carry out sharing of network interface card.
A kind of device shared system with quick peripheral component interconnection PCIe interface, run in multiple servers, at least one request server is connected with another share service device, described share service device provides has the device of PCIe interface and using the device of the described PCIe of having interface as treating sharing means, this system comprises shares driving, share agency and Sharing Management, wherein: described shared driving, the access of the configuration space of the PCIe that treats sharing means for the virtual machine that obtains described request server to described share service device is to treat the model of sharing means described in obtaining, and this access is passed to described shared agency, described shared agency, for sending this access to the Sharing Management of described share service device, described Sharing Management, for receiving this access, treats this model of sharing means and this is treated to the memory address of the base register BAR of the PCIe of sharing means returns to described shared agency, described shared agency, also for this is treated to the model of sharing means feeds back to described virtual machine, described virtual machine treats that according to this model of sharing means determines that corresponding this treat the driver of sharing means, described shared driving, also sets up first window for the designated memory space at described virtual machine, treats that according to this memory address of the base register of the PCIe of sharing means is mapped to this first window the base register internal memory of this PCIe that treats sharing means, and described Sharing Management, also, for setting up Second Window at the storage device of described share service device, this Second Window is mapped in the designated memory space in described virtual machine.
A kind of device with quick peripheral component interconnection PCIe interface is shared the shared method of the device with PCIe interface that method is carried out, run in multiple servers, at least one request server is connected with another share service device, described share service device provides has the device of PCIe interface and using the device of the described PCIe of having interface as treating sharing means, the method comprises the steps: to share the access that drives the configuration space that obtains virtual machine in the described request server PCIe that treats sharing means to described share service device to treat the model of sharing means described in obtaining, and this access is passed to described shared agency, share agency and send this access to Sharing Management in described share service device, described Sharing Management receives this access, and this is treated to the model of sharing means and this is treated to the memory address of the base register BAR of the PCIe of sharing means returns to described shared agency, described shared agency treats that by this model of sharing means feeds back to described virtual machine, and described virtual machine treats that according to this model of sharing means determines that corresponding this treat the driver of sharing means, described shared driving is set up first window in the designated memory space of described virtual machine, treats that according to this memory address of the base register of the PCIe of sharing means is mapped to this first window the base register internal memory of this PCIe that treats sharing means, and described Sharing Management sets up Second Window in the storage device of described share service device, this Second Window is mapped in the designated memory space in described virtual machine.
Compared to prior art, described device shared system and the method with quick peripheral component interconnection interface, can realize and between multiple devices, carry out sharing of network interface card, and without revising corresponding NIC driver.
Accompanying drawing explanation
Fig. 1 is the applied environment figure that the present invention has the preferred embodiments of the device shared system of PCIe interface.
Fig. 2 is the functional block diagram that the present invention has the preferred embodiments of the device shared system of PCIe interface.
Fig. 3 is the flow chart that the present invention has the preferred embodiments of the shared method of device of PCIe interface.
Main element symbol description
| Request server | 1 |
| Virtual machine | 10 |
| Storage device | 100 |
| There is the device shared system of |
11 |
| Share and drive | 110 |
| Share |
112 |
| |
114 |
| Processor | 12 |
| |
2 |
| Share service device | 3 |
| Network interface card | 30 |
| Processor | 32 |
| Storage device | 33 |
Following embodiment further illustrates the present invention in connection with above-mentioned accompanying drawing.
Embodiment
As shown in Figure 1, be the running environment figure that the present invention has the preferred embodiments of the device shared system of quick peripheral component interconnection (Peripheral Component Interconnect Express, PCIe) interface.The described device shared system 11 with PCIe interface is applied in multiple servers, to realize, the device with PCIe interface in a given server is shared.This preferred embodiments can be used for the device of all PCIe of having interfaces to share, that is, this device with PCIe interface is regarded as treating sharing means.
The technical program is below described for convenience of description and clearly, be elaborated as an example of the network interface card with PCIe interface example, in practical application, there is the device of PCIe interface all applicable to the technical program, for example: Serial Attached SCSI (SAS) (the Serial Attached SCSI with PCIe interface, SAS) card or there is PCIe card or the device such as host bus adaptor (Host Bus Adapter, HBA) card of PCIe interface.Described SCSI is small computer system interface (Small Computer System Interface).
Further, for convenience of description, server is divided into multiple roles, for example, in multiple request server 1(Fig. 1, only illustrates two) and share service device 3.Wherein, described share service device 3 uses to described request server 1 in order to the network interface card (hereinafter referred is " network interface card ") 30 that the multiple PCIe of having interfaces are provided.The quantity of the request server 1 shown in Fig. 1, share service device 3 and network interface card 30 is only for for example, also unrestricted in practical application, below describes with a network interface card 30 in share service device 3.
In described request server 1, also comprise that multiple virtual machines 10, processor 12 and other are not shown in software or the hardware unit in figure, for example, storage device, input-output equipment etc.Described virtual machine 10 also comprises that storage device 100 is separately to store the related data of each virtual machine 10, for example, and file, image etc.
Described processor 12 has the device shared system 11 of PCIe interface and all kinds of softwares of described request server 1 interior installation, such as operating system etc. described in carrying out.
Described request server 1 interconnects with described share service device 3, and described connection can be PCIe interface, and in other embodiments, described request server 1 can also be connected by other means with described share service device 3, for example, and PCI connection etc.
Described in described share service device 3 is also provided with, there is the device shared system 11 of PCIe interface, in addition, also comprise multiple network interface cards 30, processor 32 and storage device 33.Described network interface card 30 can be PCIe network interface card, or the network interface card of other types.Processor 32 of living in for example, in order to carry out the device shared system 11 with PCIe interface and other software, the operating system in described share service device 3.Described storage device 33 is for storing the various data of described share service device 3, for example, has the data that the device shared system 11 of PCIe interface is set and obtain described in utilization.
As shown in Figure 2, be the functional block diagram that the present invention has the preferred embodiments of the device shared system of PCIe interface.The device shared system 11 of the described PCIe of having interface comprises multiple functional modules, respectively: share driving 110, share agency 112 and Sharing Management 114.
As described above, described in being all provided with, there is the device shared system 11 of PCIe interface in described request server 1 and share service device 3, below be described with the cooperation having in described request server 1 and share service device 3 between the disparate modules of device shared system 11 of PCIe interface, for example, below with the shared driving 110 in the device shared system 11 with PCIe interface in described request server 1 and shared agency 112, coordinating of carrying out with the Sharing Management 114 of the device shared system 11 with PCIe interface in described share service device 3 is that example describes.
First, the virtual machine 10 in described request server 1, before realizing the network interface card 30 of sharing described share service device 3, need to first be determined the model of this network interface card 30, drives to call corresponding network interface card.In order to obtain the model of network interface card 30, described virtual machine 10 can send the configuration space of the PCIe of this network interface card of having stored these network interface card 30 models.
Described shared driving 110, the access of the configuration space of the PCIe of the network interface card 30 for the virtual machine 10 that obtains described request server 1 to described share service device 3, and this access is passed to described shared agency 112.Described access is in order to obtain the model of described network interface card 30.
Described shared driving 110 can utilize Netlink that this access is given to the shared agency in described request server, this Netlink socket is to realize a kind of special interprocess communication (the Inter-Process Communication that consumer process is communicated by letter with kernel process, IPC), be also the most frequently used interface of web application and kernel communication.
Described shared agency 112, for sending this access to the Sharing Management 114 of described share service device 3.For example, described shared agency 112 also can send this access to described Sharing Management 114 by IPC.
Described Sharing Management 114, for receiving this access, and goes the PCIe configuration space of described network interface card 30 to read the model of this network interface card 30 according to this access.
Described Sharing Management 114 is further used for the model of the network interface card 30 that this is read and the memory address of the base register of the PCIe of this network interface card 30 (Base Address Register, BAR) is returned to described shared agency 112.
Described shared agency 112, also for feeding back to the model of this network interface card 30 described virtual machine 10.Described virtual machine 10 can be determined according to the model of this network interface card 30 driver of corresponding this network interface card 30 from the operating system of described request server 1, so that this network interface card transmission related data of follow-up use.
Described shared driving 110 also for storage device 100 designated memory space at described virtual machine 10, and is set up a first window in this designated memory space.For example, described shared driving 110 can carry out designated memory space according to the memory address of setting.Described first window is the window corresponding with the window of the base register of the PCIe of network interface card 30.
Described shared driving 110, is further used in the base register internal memory of the PCIe that according to the memory address of the base register of the PCIe of this network interface card 30, this first window is mapped to this network interface card 30.Be while wanting the PCIe base register of network interface card 30 of access share service device 3 for the ease of the virtual machine 10 in described request server 1 by the mapping between this first window and described base register, only need the first window of the above-mentioned foundation of access.
For example, described shared agency 112 is detecting described virtual machine 10 while utilizing described first window to carry out access action, be the instruction of the internal memory of the base register of this network interface card 30 in share service device 3 described in access by the instruction transformation of the designated memory space of virtual machine 10 described in this access (being first window), and carry out the instruction after this conversion.
Described Sharing Management 114, also sets up a Second Window for the storage device 33 at described share service device 3, and this Second Window is mapped in the designated memory space in described virtual machine 10.
The I/O memory management unit (input/output memory management unitIOMMU) that described Sharing Management 114 is further used for arranging on described share service device 3 and request server 1 carries out address transition for direct internal memory operation (Direct Memory Access, the DMA) instruction of this network interface card 30.
Particularly, described Sharing Management 114 is detecting this network interface card 30 need carry out access to the storage device of the virtual machine 10 in described request server 1 100 time, and the DMA instruction transformation of utilizing the IOMMU on described share service device 3 that this network interface card 30 is sent becomes the DMA instruction of access Second Window.Then, described Sharing Management 114 is utilized the IOMMU instruction for the designated memory space of the virtual machine 10 in access described request server 1 by the DMA instruction transformation of described access Second Window on described request server 1, and carries out the instruction after conversion.
The foundation of described first, second window is that the nontransparent bridge joint (non-transparent bridging NTB) that utilizes PCIe carries out, and the mapping of described first, second window utilizes IOMMU to carry out.
In addition, in other embodiments, in the time that described share service device 3 comprises multiple network interface card 30, described Sharing Management 114 is also for distributing the network interface card 30 of described share service device 3 to described virtual machine 10, and the function of carrying out above-mentioned modules for the network interface card 30 of this distribution is to realize sharing of the network interface card 30 of described request server 1 to this distribution in described share service device 3.
As shown in Figure 3, be the flow chart that the present invention has the preferred embodiments of the shared method of device of quick peripheral component interconnection interface.First, step S2, the access of the configuration space of the PCIe of virtual machine 10 in described request server 1 network interface card 30 to described share service device 3 is obtained in described shared driving 110, and this access is passed to described shared agency 112.Described access is in order to obtain the model of described network interface card 30.
Step S4, described shared agency 112 sends this access to Sharing Management 114 in described share service device 3.
Step S6, described Sharing Management 114 receives this access, go the PCIe configuration space of described network interface card 30 to read the model of this network interface card 30 according to this access, and return to described shared agency 112 by the model of this network interface card 30 reading and by the memory address of the base register of the PCIe of this network interface card 30.
Step S8, the model of this network interface card 30 is fed back to described virtual machine 10 by described shared agency 112.Described virtual machine 10 can be determined according to the model of this network interface card 30 driver of corresponding this network interface card 30 from the operating system of described request server 1.
Step S10, described shared driving 110 is designated memory space in the storage device 100 of described virtual machine 10, and in this designated memory space, set up a first window, and according to the memory address of the base register of the PCIe of this network interface card 30, this first window is mapped in the base register internal memory of PCIe of this network interface card 30.
Step S12, described Sharing Management 114 is set up a Second Window in the storage device 33 of described share service device 3, and this Second Window is mapped in the designated memory space in described virtual machine 10, then, process ends.
Above execution mode is only unrestricted in order to technical scheme of the present invention to be described, although the present invention is had been described in detail with reference to above preferred embodiments, those of ordinary skill in the art should be appreciated that and can modify or be equal to the spirit and scope that replacement should not depart from technical solution of the present invention technical scheme of the present invention.
Claims (10)
1. one kind has the device shared system of quick peripheral component interconnection PCIe interface, run in multiple servers, it is characterized in that, at least one request server is connected with another share service device, described share service device provides has the device of PCIe interface and using the device of the described PCIe of having interface as treating sharing means, this system comprises shares driving, shared agency and Sharing Management, wherein:
Described shared driving, the access of the configuration space of the PCIe that treats sharing means for the virtual machine that obtains described request server to described share service device is treated the model of sharing means described in obtaining, and this access is passed to described shared agency;
Described shared agency, for sending this access to the Sharing Management of described share service device;
Described Sharing Management, for receiving this access, treats this model of sharing means and this is treated to the memory address of the base register BAR of the PCIe of sharing means returns to described shared agency;
Described shared agency, also for this is treated to the model of sharing means feeds back to described virtual machine, described virtual machine treats that according to this model of sharing means determines that corresponding this treat the driver of sharing means;
Described shared driving, also sets up first window for the designated memory space at described virtual machine, treats that according to this memory address of the base register of the PCIe of sharing means is mapped to this first window the base register internal memory of this PCIe that treats sharing means; And
Described Sharing Management, also, for setting up Second Window at the storage device of described share service device, is mapped to this Second Window in the designated memory space in described virtual machine.
2. the device shared system with quick peripheral component interconnection PCIe interface as claimed in claim 1, it is characterized in that, described shared agency is also for detecting described virtual machine while utilizing described first window to carry out access action, be that in share service device, this treats the instruction of the internal memory of the base register of sharing means described in access by the instruction transformation of the designated memory space of virtual machine described in this access, and carry out the instruction after conversion.
3. the device shared system with quick peripheral component interconnection PCIe interface as claimed in claim 1, it is characterized in that, described Sharing Management is also carried out address transition for the I/O memory management unit IOMMU arranging on described share service device and request server for this direct internal memory operation DMA instruction for the treatment of sharing means.
4. the device shared system with quick peripheral component interconnection PCIe interface as claimed in claim 3, is characterized in that, described Sharing Management also for:
Detect this in the time that sharing means need be carried out access to the storage device of the virtual machine of described request server, utilizing IOMMU on described share service device this DMA instruction transformation for the treatment of that sharing means is sent to be become to the DMA instruction of access Second Window; And
Utilize the IOMMU instruction for the designated memory space of the virtual machine in access described request server by the DMA instruction transformation of described access Second Window on request server, and carry out the instruction after conversion.
5. the device shared system with quick peripheral component interconnection PCIe interface as claimed in claim 1, it is characterized in that, the foundation of described first, second window is to utilize the nontransparent bridge joint NTB of PCIe to carry out, and the mapping of described first, second window utilizes IOMMU to carry out.
6. a device with PCIe interface that utilizes the device shared system with quick peripheral component interconnection PCIe interface as claimed in claim 1 to carry out is shared method, run in multiple servers, it is characterized in that, at least one request server is connected with another share service device, described share service device provides has the device of PCIe interface and using the device of the described PCIe of having interface as treating sharing means, the method comprises the steps:
Shared driving is obtained the access of the configuration space of virtual machine in the described request server PCIe that treats sharing means to described share service device and treat the model of sharing means described in being obtained, and this access is passed to described shared agency;
Share agency and send this access to Sharing Management in described share service device;
Described Sharing Management receives this access, and this is treated to the model of sharing means and this is treated to the memory address of the base register BAR of the PCIe of sharing means returns to described shared agency;
Described shared agency treats that by this model of sharing means feeds back to described virtual machine, and described virtual machine treats that according to this model of sharing means determines that corresponding this treat the driver of sharing means;
Described shared driving is set up first window in the designated memory space of described virtual machine, treats that according to this memory address of the base register of the PCIe of sharing means is mapped to this first window the base register internal memory of this PCIe that treats sharing means; And
Described Sharing Management is set up Second Window in the storage device of described share service device, and this Second Window is mapped in the designated memory space in described virtual machine.
7. the device with quick peripheral component interconnection PCIe interface as claimed in claim 6 is shared method, it is characterized in that, the method also comprises:
Share agency detecting described virtual machine while utilizing described first window to carry out access action, be that in share service device, this treats the instruction of the internal memory of the base register of sharing means described in access by the instruction transformation of the designated memory space of virtual machine described in this access, and carry out the instruction after conversion.
8. the device with quick peripheral component interconnection PCIe interface as claimed in claim 6 is shared method, it is characterized in that, the method also comprises:
The IOMMU arranging on described share service device and request server carries out address transition for this DMA instruction for the treatment of sharing means.
9. the device with quick peripheral component interconnection PCIe interface as claimed in claim 8 is shared method, it is characterized in that, the method also comprises:
Detect this in the time that sharing means need be carried out access to the storage device of the virtual machine of described request server, utilizing IOMMU on described share service device this direct internal memory operation DMA instruction transformation for the treatment of that sharing means is sent to be become to the DMA instruction of access Second Window; And
Utilize the IOMMU instruction for the designated memory space of the virtual machine in access described request server by the DMA instruction transformation of described access Second Window on request server, and carry out the instruction after conversion.
10. the device with quick peripheral component interconnection PCIe interface as claimed in claim 6 is shared method, it is characterized in that, when described share service device comprises multiplely during until sharing means, the method also comprises:
Described Sharing Management is distributed and is treated that sharing means is to described virtual machine in described share service device.
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Application publication date: 20140618 |