CN109753462A - A kind of DMA data transfer method based on FT server PCIE interface card - Google Patents
A kind of DMA data transfer method based on FT server PCIE interface card Download PDFInfo
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- CN109753462A CN109753462A CN201711093603.0A CN201711093603A CN109753462A CN 109753462 A CN109753462 A CN 109753462A CN 201711093603 A CN201711093603 A CN 201711093603A CN 109753462 A CN109753462 A CN 109753462A
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Abstract
A kind of DMA data transfer method based on FT server PCIE interface card, comprising: 1) the PCIE interface based on FT server platform is connect with exterior PC IE interface board, data interaction is carried out using dma mode；2) PCIE device driver is designed, comprising: the registration and cancellation, the initialization of PCIE device and release, control function of PCIE device driving；3) PCIE rate test program is designed, comprising: realize that being written and read test and FT server to specified register writes data, reading data to PCIE interface board dma controller, and calculate the rate of read-write.The present invention realizes I/O read-write operation in such a way that the PCIE interface card to FT server takes direct memory access (DMA), to promote the read and write rate of domestic FT server Yu the data interaction of PCIE external equipment, to promote the performance of FT server.
Description
Technical field
The present invention relates to a kind of DMA data transfer methods based on FT server PCIE interface card, belong to server count
According to the technical field of transmission.
Background technique
PCIE belongs to the point-to-point binary channels high bandwidth transmission of high speed serialization, and the equipment distribution connected exclusively enjoys bandwidth chahnel,
Bus bandwidth is not shared, mainly supports active power management, error reporting, end-to-end reliability transmission, hot plug and clothes
The functions such as business quality (QOS).PCIE is a multi-layer protocol, by a dialogue layer, a data exchange layer and a physical layer
It constitutes.Physical layer can be further divided into logical sub-layer and electrical sub layer again.Logical sub-layer can be divided into physical codes sublayer (PCS) again
With M AC sublayer (MAC).
DMA (Direct Memory Access, direct memory access), it allows the hardware device of friction speed to carry out ditch
It is logical, a large amount of interrupt loads without depending on CPU.It is that bus is directly administered by dma controller when realizing DMA transfer,
Accordingly, there exist a bus control right branch problems.I.e. before DMA transfer, CPU gives dma controller bus control right,
And after terminating DMA transfer, bus control right should be handed back to CPU immediately by dma controller again.One complete DMA transfer mistake
Journey has to pass through: DMA request, DMA response, DMA transfer, DMA terminate 4 steps.
To sum up, in the art, there are no the DMA data transfer methods based on FT server PCIE interface card.
Summary of the invention
In view of the deficiencies of the prior art, the present invention provides a kind of DMA data biography based on FT server PCIE interface card
Transmission method.
The present invention carries out physical connection for FT server platform and exterior PC IE interface board, is carried out using dma mode
Data interaction.The present invention is taken directly by the PCIE interface card (PCIE network interface card, PCIE turn FPGA card etc.) to FT server
The mode of internal storage access (DMA) realizes I/O read-write operation, hands over to promote domestic FT server and PCIE external equipment data
Mutual read and write rate, to promote the performance of FT server.Dma operation is taken to realize that FT server is posted with PCIE interface board
I/O read-write operation between storage, can effectively improve the throughput of data.
Technical scheme is as follows:
A kind of DMA data transfer method based on FT server PCIE interface card, comprising:
1) the PCIE interface based on FT server platform is connect with exterior PC IE interface board, is carried out using dma mode
Data interaction；In order to realize that high speed data transfer using PCIE3.0x16 interface, is devised based on FT server platform PCIE
Interface is connect with exterior PC IE interface board；
2) PCIE device driver is designed, comprising: the registration and cancellation, the initialization of PCIE device of PCIE device driving
With release, control function；The control function includes the data for reading PCIE external equipment storage unit, PCIE is external sets for write-in
Data, interruption, DMA map programming of standby storage unit etc.；
3) PCIE rate test program is designed, comprising: realization is written and read test to specified register, and the service of soaring
Device writes data to PCIE interface board dma controller, reads data, and calculates the rate of read-write.
It is preferred according to the present invention, in the step 2), streaming DMA map is established using DMA map programming, to make
In the system for supporting mapping register, each DMA map uses one or more mapping registers in bus.And then maximum journey
Degree ground optimization performance.
It is preferred according to the present invention, the DMA data transfer method based on FT server PCIE interface card further include:
Using command dma is read after being write to the PCIE interface board, the data of reading are stored in file, for verifying DMA read-write
The correctness of data.
Technical advantage of the invention is as follows:
Method of the present invention is connect by PCIE with exterior PC IE interface equipment using FT server, passes through DMA
Data interaction between Mapping implementation FT server and PCIE external interface board.The present invention is for FT server platform and outside
Portion's PCIE interface board carries out physical connection, carries out data interaction using dma mode.The present invention passes through the PCIE to FT server
Interface card (PCIE network interface card, PCIE turn FPGA card etc.) takes the mode of direct memory access (DMA) to realize I/O read-write operation, uses
To promote the read and write rate of domestic FT server Yu the data interaction of PCIE external equipment, to promote the property of FT server
Energy.It takes dma operation to realize the I/O read-write operation between FT server and PCIE interface board register, can effectively mention
The throughput of high data.
Detailed description of the invention
Fig. 1 is in the present invention, and the dma mode data of the FT server and PCIE external equipment transmit schematic diagram；
Fig. 2 is the FT server and PCIE external equipment dma mode data transmission stream journey figure in the present invention.
Specific embodiment
The present invention is described in detail below with reference to embodiment and Figure of description, but not limited to this.
As shown in Figure 1, 2.
Embodiment,
A kind of DMA data transfer method based on FT server PCIE interface card, comprising:
1) the PCIE interface based on FT server platform is connect with exterior PC IE interface board, is carried out using dma mode
Data interaction；
2) PCIE device driver is designed, comprising: the registration and cancellation, the initialization of PCIE device of PCIE device driving
With release, control function；
3) PCIE rate test program is designed, comprising: realization is written and read test to specified register, and the service of soaring
Device writes data to PCIE interface board dma controller, reads data, and calculates the rate of read-write.
In the step 2), streaming DMA map is established using DMA map programming, to make to support mapping register
In system, each DMA map uses one or more mapping registers in bus.
The DMA data transfer method based on FT server PCIE interface card further include: Xiang Suoshu PCIE interface board
Using command dma is read after writing, the data of reading are stored in file, for verifying the correctness of DMA read-write data.
Application examples,
A kind of DMA data transfer method based on FT server PCIE interface card as described embodiments, specifically includes:
1) by exterior PC IE interface board (PCIE network interface card, PCIE turn FPGA interface plate) and FT server platform PCIE3.0
Interface carries out physical connection；
2) registration that is driven by PCIE DMA data transfer driver and PCIE external equipment is examined
It surveys, load (being realized by matching driving and the primary and secondary device number of driving equipment setting)；After equipment loads successfully, the service of soaring
Device is carried out data transmission with exterior PC IE interface board using dma mode；
3) PCIE DMA rate test example procedure is used, verifying FT server platform and PCIE device use DMA number
According to interactive validity.To 0x14 register write 0x80000000, then 0x0 is write, completes to reset；Firstly, to register 0x0,0x4
It is written and read test, verifying FT server platform and PCIE register can carry out normal data transmission；Secondly, using DMA
Mode executes DMA write, read operation repeatedly, and verifying realizes that FT server and PCIE external interface board data pass using dma mode
Defeated reliability；Again, by sending 64KB data to PCIE device, the rate of PCIE device is written using dma mode for test；Most
Afterwards, by receiving the data of PCIE device 32KB, the rate of PCIE device is read in test using dma mode；
If 4) aforesaid operations can be realized normally, the cancellation of PCIE external equipment and the cancellation of driver are executed；If
Aforesaid operations are abnormal, check the setting of DMA transfer operation corresponding registers address, and repeat aforesaid operations.
The present invention can accurately and efficiently improve FT server platform and PCIE external interface data using dma mode
Interactive rate.
Claims (3)
1. a kind of DMA data transfer method based on FT server PCIE interface card, which is characterized in that the data transmission method
Include:
1) the PCIE interface based on FT server platform is connect with exterior PC IE interface board, data is carried out using dma mode
Interaction；
2) PCIE device driver is designed, comprising: registration and cancellation, the initialization of PCIE device of PCIE device driving and release
It puts, control function；
3) design PCIE rate test program, comprising: realize to specified register be written and read test and FT server to
PCIE interface board dma controller writes data, reads data, and calculates the rate of read-write.
2. a kind of DMA data transfer method based on FT server PCIE interface card according to claim 1, feature
It is, in the step 2), streaming DMA map is established using DMA map programming, to make the system for supporting mapping register
In, each DMA map uses one or more mapping registers in bus.
3. a kind of DMA data transfer method based on FT server PCIE interface card according to claim 1, feature
It is, the DMA data transfer method based on FT server PCIE interface card further include: Xiang Suoshu PCIE interface board writes it
Afterwards using command dma is read, the data of reading are stored in file, for verifying the correctness of DMA read-write data.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711093603.0A CN109753462A (en) | 2017-11-08 | 2017-11-08 | A kind of DMA data transfer method based on FT server PCIE interface card |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711093603.0A CN109753462A (en) | 2017-11-08 | 2017-11-08 | A kind of DMA data transfer method based on FT server PCIE interface card |
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| CN109753462A true CN109753462A (en) | 2019-05-14 |
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| CN201711093603.0A Pending CN109753462A (en) | 2017-11-08 | 2017-11-08 | A kind of DMA data transfer method based on FT server PCIE interface card |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110153875A1 (en) * | 2009-12-18 | 2011-06-23 | Plx Technology, Inc. | Opportunistic dma header insertion |
| CN105356988A (en) * | 2015-10-16 | 2016-02-24 | 陕西海泰电子有限责任公司 | PCIe based full duplex DMA transmission method |
| CN105487990A (en) * | 2014-09-19 | 2016-04-13 | 中兴通讯股份有限公司 | Method and device for transmitting information messages between CPU and chip |
| CN106844245A (en) * | 2017-02-17 | 2017-06-13 | 北京腾凌科技有限公司 | Data transmission method and device |
| CN107301140A (en) * | 2017-06-27 | 2017-10-27 | 山东超越数控电子有限公司 | A kind of utilization FPGA interface plate uses the method that DMA carries out data transmission |
-
2017
- 2017-11-08 CN CN201711093603.0A patent/CN109753462A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110153875A1 (en) * | 2009-12-18 | 2011-06-23 | Plx Technology, Inc. | Opportunistic dma header insertion |
| CN105487990A (en) * | 2014-09-19 | 2016-04-13 | 中兴通讯股份有限公司 | Method and device for transmitting information messages between CPU and chip |
| CN105356988A (en) * | 2015-10-16 | 2016-02-24 | 陕西海泰电子有限责任公司 | PCIe based full duplex DMA transmission method |
| CN106844245A (en) * | 2017-02-17 | 2017-06-13 | 北京腾凌科技有限公司 | Data transmission method and device |
| CN107301140A (en) * | 2017-06-27 | 2017-10-27 | 山东超越数控电子有限公司 | A kind of utilization FPGA interface plate uses the method that DMA carries out data transmission |
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