CN103888293A - Data channel scheduling method of multichannel FC network data simulation system - Google Patents
Data channel scheduling method of multichannel FC network data simulation system Download PDFInfo
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Abstract
The invention discloses a data channel scheduling method of a multichannel FC network data simulation system, comprising that: a standard FIFO port is provided by configuring a plurality of asynchronous printed circuit boards on one side of a PCIE management module of an FC network data simulated card, a DMA caching module is configured on each channel of one side of a PC, and the DMA caching module realizes bidirection multichannel transmission of the asynchronous printed circuit board FIFO and the PC through the PCIE management module. As a result, that a plurality of optical ports are arranged on the FC simulation card can be realized, which reduces the cost for information multichannel transmission and supports the port redundant.
Description
Technical field
The invention belongs to network communications technology field, more specifically say, relate to a kind of data channel dispatching method of multichannel FC network data analogue system.
Background technology
Along with going deep into of synthesization, adopt unified optical interconnection network to become the inexorable trend of avionics system interconnected.The advantages such as network is highly reliable with it for airborne optical-fibre channel (Fiber Channel, FC), low cost, two-forty, real-time, extensibility is good become the main flow of airborne avionics network design and select.Airborne fiber optic network technology will obtain in aviation electronics field application widely.
At present, many companies and R&D institution in the world, as IBM, HP, DELL, Brocade, Qlogic, Huawei etc., all participate in the research and development of a series of equipment based on fiber channel protocol, and many products that have been widely used are developed, as Brocade company has developed the fibre channel media of many moneys based on FC agreement, the HBA card that Qlogic company develops etc.But these equipment and product for the application of storage area network, cannot adapt to the application under aviation electronics environment mostly.Even external some, for the general utility functions product of FC agreement, also cannot meet the actual user demand of domestic research and development, and cannot support the subsequent development needing.Therefore, the FC analogue system in the urgent need to supporting to apply under aviation electronics environment.
In avionics network, the various message that each terminal equipment moves generation comprise the common business datum forming in avionics network system such as emergency message, periodic messages, event message, flow data message, realize high speed, reliable real time communication between each system and subsystem.Airborne FC network data analogue system is mainly used in the function of analog machine mounted terminal equipment, realizes the sending and receiving of the FC network data that meets FC-AE-ASM agreement, and supports the Clock management of FC bus network communication system and the control function of network management.It can be simulated neatly dissimilar port by configuration easily and transmit and receive data, complete the hardware-in-the-loop simulation of various airborne equipments, ground simulation debugging enironment related to this is provided, simulation realizes each internodal communication interconnect in system, is the effective tool that airborne FC avionics network system is carried out to comprehensive verification.
As shown in Figure 1, FC network data analogue system is made up of hardware FC network data artificial card and software FC network data simulation software.Hardware components-FC network data artificial card is realized the high efficiency of transmission of FC network data, and the high-speed communication with PC with the realization of PCI-Express bus mode; Software section-FC network data simulation system software operates on PC platform, and main task is the miscellaneous service data in simulation airborne circumstance, requires to carry out framing, encapsulation, sends out frame, receives frame etc. according to user.The co-ordination of FC network data analogue system software and hardware completes the sending and receiving of FC protocol data jointly.Wherein process of transmitting mainly comprises that message is encapsulated as FC frame at software layer, bottom PCIE drives and FC frame to be packaged into the TLP bag that meets PCIE protocol transmission to pass to PCIE interface, by the mode of DMA, on board, receive data, again TLP bag is resolved to FC frame and put into buffer memory, form through FC data processing module the data flow that meets FC agreement, and conversion sends in optical-fibre channel through electro-optical signal; Receiving course mainly comprises receives the FC frame transmitting in optical-fibre channel on board, be packaged into the TLP bag that meets PCIE protocol transmission and pass to host computer, and then the simulation software on computer resolves TLP bag and be reduced into the FC frame of standard.
Conventionally, in avionics network, each terminal node need to dispose multiple ports, if adopt the discrete airborne FC network data of the single port artificial card combination of polylith to realize multi-channel data transmission, realizes difficulty larger in network topology, and weight and cost increase.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, a kind of data channel dispatching method of multichannel FC network data analogue system is provided, to realize selection and the read-write operation of multiple channel datas of analogue system inside, thereby can on a FC artificial card, realize the parallel transmission of multiple data channel.
For achieving the above object, the data channel dispatching method of a kind of multichannel FC of the present invention network data analogue system, is characterized in that, comprises the following steps:
(1), the port initialization of multichannel FC network data analogue system:
(1.1), get the port number of FC network data artificial card equipment handle and artificial card support by multichannel FC network data simulation software;
(1.2), multichannel FC network data simulation software obtains the port arrangement scheme file being determined by system from FC network data artificial card, described port arrangement scheme file content comprises port id, sends communication table and received communication table, and according to communication table Distribution Calculation machine memory source;
(2), multichannel FC network data analogue system sends data:
(2.1), the data of transmission are sent in message send queue; After message generation, by the transmission communication table of inquiry port, become the FC frame of standard by sending data encapsulation, then according to the port id inquiring and type of message, the FC frame after encapsulation is sent to and is sent in message queue;
(2.2), FC frame being stored in to DMA sends in buffer memory; Send scheduler module scanning and send message queue, according to the priority of message, FC frame is gone out to team, and be stored in corresponding DMA transmission buffer memory according to the port id of message; Message is stored in DMA completely and sends after buffer memory, the PCIE administration module of FC frame corresponding information notice FC network data artificial card, initiates DMA read operation by register, if DMA sends buffer memory while being filled with, notice sends scheduler module and stops sending data;
(2.3), transmission data being sent to buffer memory from DMA moves board asynchronous FIFO; DMA writes by memory write request physical address and the read request number that DMA read operation needs, and send PCIE administration module to, PCIE administration module is according to writing information, and by request msg, through PCIE bus, the DMA from PC sends buffer memory and moves to board FIFO at a high speed;
(2.4), passage moderator adopts the mode of poll that the FC frame in board asynchronous FIFO is read out, and send to FC data processing module and send;
(3), multichannel FC network data analogue system receives data:
(3.1), receive data is stored in board asynchronous FIFO to receive FC frame after FC data processing module is processed, passage moderator adopts polling mode to judge current need channel number to be processed, board is sent out and is interrupted to PC, and the reception FC frame information in board asynchronous FIFO corresponding this passage is write to PCIE register;
(3.2), the FC frame in board asynchronous FIFO being sent to DMA receives in buffer memory; Computer response board interrupts, and starts DMA write operation, sends the reception buffer area initial address of distribution and transmission byte number to PCIE administration module simultaneously, data is moved at a high speed from board FIFO through PCIE bus to the DMA PC and is received buffer memory; After one time DMA has write, board will produce an interrupt signal to PC;
(3.3) the FC frame, by receiving scheduling module, DMA being received in buffer memory is sent to message sink queue; PC receives after the interrupt signal that DMA write, and notice receiving scheduling module is processed the data that write; Receiving scheduling module judges the arrival of FC frame, according to arrive first first go out take out FC frame in turn, and according to port received communication table, this FC frame is carried out, after verification parsing, putting into the receiving queue of message corresponding ports, the unique sign number of the overall situation that described message id is every message according to message id;
(3.4), FC frame is gone out to team and by message content extraction, completes data receiver from message sink queue.
Further, at the multiple asynchronous board FIFO of PCIE administration module one side configuration, the fifo interface of standard is provided, and at each passage configuration DMA cache module of PC one side, DMA cache module is realized the two-way multi-channel transmission of asynchronous board FIFO and PC by PCIE administration module.
Wherein, described message comprises emergency message, periodic messages, time message and flow message; The priority level of message is followed successively by: emergency message > periodic messages > event message > flow message.
Described transmission message queue is to send communication table according to port in port initialization process, distribute and send the transmit queue that buffer memory is set up, each port has the circular buffer of Four types: emergency message buffer memory, periodic messages buffer memory, event message buffer memory and large data-message buffer memory; Receipt message queue be in port initialization process according to port received communication table, distribute receive buffer memory, each message id has the message sink queue of oneself.
The referee method of described passage moderator is: passage moderator adopts polling mode to determine to process the data of current which passage according to the priority weighting of each passage, and whether the passage of judging current selection has data to send, if there are data to send, start this passage, if do not have data to send, directly skip and turn to next passage when prepass.
Goal of the invention of the present invention is achieved in that
The data channel dispatching method of multichannel FC network data analogue system of the present invention, by the multiple asynchronous board FIFO of PCIE administration module one side configuration at FC network data artificial card, the fifo interface of standard is provided, at each passage configuration DMA cache module of PC one side, DMA cache module is realized the two-way multi-channel transmission of asynchronous board FIFO and PC by PCIE administration module.Thereby realize and configure multiple optical ports on a FC artificial card, realize the channel transmission of message with low cost, also support port redundancy simultaneously.
Meanwhile, the data channel dispatching method of multichannel FC network data analogue system of the present invention also has following beneficial effect:
(1), PCIE administration module one side of FC network data artificial card disposes multiple asynchronous board FIFO, FIFO provides the interface of standard, can connect FC data;
(2), on a FC artificial card, realize the parallel transmission of multiple data channel in multichannel FC network data analogue system, greatly saved cost;
(3), adopt direct memory access mode in multichannel FC network data analogue system, improve data transmission efficiency, reduced the load of processor simultaneously.
Brief description of the drawings
Fig. 1 is the structured flowchart of FC network (WSN) emulation system;
Fig. 2 is the FB(flow block) of multichannel FC network data analogue system data channel dispatching method.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described, so that those skilled in the art understands the present invention better.Requiring particular attention is that, in the following description, in the time that perhaps the detailed description of known function and design can desalinate main contents of the present invention, these are described in here and will be left in the basket.
Embodiment
Fig. 2 is the FB(flow block) of multichannel FC network data analogue system data channel dispatching method.
In the present embodiment, as shown in Figure 2, the data channel dispatching method of multichannel FC network data analogue system of the present invention, comprises the following steps:
1), the port initialization of multichannel FC network data analogue system:
1.1), get the port number of FC network data artificial card equipment handle and board support by multichannel FC network data simulation software;
1.2), multichannel FC network data simulation software obtains the port arrangement scheme file being determined by system from FC network data artificial card, wherein, port arrangement scheme file comprises port id, sends communication table and received communication table, and according to communication table Distribution Calculation machine memory source;
2), multichannel FC network data analogue system sends data:
2.1), the data of transmission are sent in message send queue; After message generation, by the transmission communication table of inquiry port, become the FC frame of standard by sending data encapsulation, then according to the port id inquiring and type of message, the FC frame after encapsulation is sent to and is sent in message queue; In the present embodiment, the message generating is taking emergency message, periodic messages, time message and flow message as example, and the priority level of message is followed successively by: emergency message > periodic messages > event message > flow message;
2.2), FC frame being stored in to DMA sends in buffer memory; Send scheduler module scanning and send message queue, according to the priority of message, FC frame is gone out to team, and be stored in corresponding DMA transmission buffer memory according to the port id of message; Message is stored in DMA completely and sends after buffer memory, the PCIE administration module of FC frame corresponding information notice FC network data artificial card, initiates DMA read operation by register, if DMA sends buffer memory while being filled with, notice sends scheduler module and stops sending data;
2.3), transmission data being sent to buffer memory from DMA moves board asynchronous FIFO; DMA writes by memory write request physical address and the read request number that DMA read operation needs, and send FCIE administration module to, PCIE administration module is according to writing information, and by request msg, through PCIE bus, the DMA from PC sends buffer memory and moves to board FIFO at a high speed; In the present embodiment, adopt PCI Express bus can finely meet the requirement of FC network data artificial card to transmission rate and bandwidth, thereby realize the high speed data transfer between FC network data artificial card and main frame;
2.4), passage moderator adopts the mode of poll that the FC frame in board asynchronous FIFO is read out, and send to FC data processing module and send;
3), multichannel FC network data analogue system receives data:
3.1), receive data is stored in board asynchronous FIFO to receive FC frame after FC data processing module is processed, passage moderator adopts polling mode to judge current need channel number to be processed, and the reception FC frame corresponding information in board asynchronous FIFO corresponding this passage is sent to PC with interrupt mode;
3.2), the FC frame in board asynchronous FIFO being sent to DMA receives in buffer memory; Computer response board interrupts, and starts DMA write operation, sends the reception buffer area initial address of distribution and transmission byte number to PCIE administration module simultaneously, data is moved at a high speed from board FIFO through PCIE bus to the DMA PC and is received buffer memory; After one time DMA has write, board will produce an interrupt signal to PC;
3.3) the FC frame, by receiving scheduling module, DMA being received in buffer memory is sent to message sink queue; PC receives after the interrupt signal that DMA write, and notice receiving scheduling module is processed the data that write; Receiving scheduling module judges the arrival of FC frame, according to arrive first first go out take out FC frame in turn, and after this FC frame is carried out verification and resolved, put into the receiving queue of message corresponding ports;
3.4), FC frame is gone out to team and by message content extraction, completes data receiver from message sink queue.
In the present embodiment, all adopt passage moderator polling mode in data input and data output part, basically identical for ensureing each channel data transmitting-receiving speed, the priority weighting of each passage is arranged identical, in the time that whether the passage of judging current selection has data to send, if there are data to send, start this passage, if do not have data to send, directly skip and turn to next passage when prepass.
Although above the illustrative embodiment of the present invention is described; so that those skilled in the art understand the present invention; but should be clear; the invention is not restricted to the scope of embodiment; to those skilled in the art; as long as various variations appended claim limit and definite the spirit and scope of the present invention in, these variations are apparent, all utilize innovation and creation that the present invention conceives all at the row of protection.
Claims (5)
1. a data channel dispatching method for multichannel FC network data analogue system, is characterized in that, comprises the following steps:
(1), the port initialization of multichannel FC network data analogue system:
(1.1), get the port number of FC network data artificial card equipment handle and artificial card support by multichannel FC network data simulation software;
(1.2), multichannel FC network data simulation software obtains the port arrangement scheme file being determined by system from FC network data artificial card, described port arrangement scheme file content comprises port id, sends communication table and received communication table, and according to communication table Distribution Calculation machine memory source;
(2), multichannel FC network data analogue system sends data:
(2.1), the data of transmission are sent in message send queue; After message generation, by the transmission communication table of inquiry port, become the FC frame of standard by sending data encapsulation, then according to the port id inquiring and type of message, the FC frame after encapsulation is sent to and is sent in message queue;
(2.2), FC frame being stored in to DMA sends in buffer memory; Send scheduler module scanning and send message queue, according to the priority of message, FC frame is gone out to team, and be stored in corresponding DMA transmission buffer memory according to the port id of message; Message is stored in DMA completely and sends after buffer memory, the PCIE administration module of FC frame corresponding information notice FC network data artificial card, initiates DMA read operation by register, if DMA sends buffer memory while being filled with, notice sends scheduler module and stops sending data;
(2.3), transmission data being sent to buffer memory from DMA moves board asynchronous FIFO; DMA writes by memory write request physical address and the read request number that DMA read operation needs, and send PCIE administration module to, PCIE administration module is according to writing information, and by request msg, through PCIE bus, the DMA from PC sends buffer memory and moves to board FIFO at a high speed;
(2.4), passage moderator adopts the mode of poll that the FC frame in board asynchronous FIFO is read out, and send to FC data processing module and send;
(3), multichannel FC network data analogue system receives data:
(3.1), receive data is stored in board asynchronous FIFO to receive FC frame after FC data processing module is processed, passage moderator adopts polling mode to judge current need channel number to be processed, board is sent out and is interrupted to PC, and the reception FC frame information in board asynchronous FIFO corresponding this passage is write to PCIE register;
(3.2), the FC frame in board asynchronous FIFO being sent to DMA receives in buffer memory; Computer response board interrupts, and starts DMA write operation, sends the reception buffer area initial address of distribution and transmission byte number to PCIE administration module simultaneously, data is moved at a high speed from board FIFO through PCIE bus to the DMA PC and is received buffer memory; After one time DMA has write, board will produce an interrupt signal to PC;
(3.3) the FC frame, by receiving scheduling module, DMA being received in buffer memory is sent to message sink queue; PC receives after the interrupt signal that DMA write, and notice receiving scheduling module is processed the data that write; Receiving scheduling module judges the arrival of FC frame, according to arrive first first go out take out FC frame in turn, and according to port received communication table, this FC frame is carried out, after verification parsing, putting into the receiving queue of message corresponding ports, the unique sign number of the overall situation that described message id is every message according to message id;
(3.4), FC frame is gone out to team and by message content extraction, completes data receiver from message sink queue.
2. the data channel dispatching method of multichannel FC network data analogue system according to claim 1, characterized by further comprising: the described multiple asynchronous board FIFO of PCIE administration module one side configuration, the fifo interface of standard is provided, each passage configuration DMA cache module of PC one side, DMA cache module is realized the two-way multi-channel transmission of asynchronous board FIFO and PC by PCIE administration module.
3. the data channel dispatching method of multichannel FC network data analogue system according to claim 1, is characterized in that, described type of message comprises emergency message, periodic messages, time message and flow message; The priority level of message is followed successively by: emergency message > periodic messages > event message > flow message.
4. the data channel dispatching method of multichannel FC network data analogue system according to claim 1, it is characterized in that, described transmission message queue is to send communication table according to port in port initialization process, distribute and send the transmit queue that buffer memory is set up, each port has the circular buffer of Four types: emergency message buffer memory, periodic messages buffer memory, event message buffer memory and large data-message buffer memory; Receipt message queue be in port initialization process according to port received communication table, distribute receive buffer memory, each message id has the message sink queue of oneself.
5. the data channel dispatching method of multichannel FC network data analogue system according to claim 1, it is characterized in that, the referee method of described passage moderator is: passage moderator adopts polling mode to determine to process the data of current which passage according to the priority weighting of each passage, and whether the passage of judging current selection has data to send, if there are data to send, start this passage, if do not have data to send, directly skip and turn to next passage when prepass.
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