CN115801698A - System and method for switching frames in process of converting FC (fiber channel) frames into srio frames - Google Patents

Abstract

The present invention provides a system and method for processing frame switching in the process of converting FC frames to srio frames, wherein the system includes: an FC frame dismantling module for receiving FC frames of each channel and dismantling the first data; an interconnection module for Obtain the first data from each FC frame dismantling module according to the preset rules, to send to the data processing module; the data processing module is used to obtain and store the content data and content length in the first data, according to the first data channel number to obtain the corresponding target data, when the first data of different channels is interrupted by frame insertion, the descriptor data of the interrupted first data is stored; when the transmission is resumed, the corresponding descriptor data is fed back according to the channel number to continue The remaining content data of the first data is transmitted, and finally the content data and target data of the first data, or the content data and descriptor data of continued transmission are integrated into srio frame output. This is used to support the processing of multiple frame alternation/frame switching, so that the data frame in the communication process is allowed to be interrupted multiple times.

Description

A system and method for processing frame switching in the process of converting FC frames to SRIO frames

technical field

The invention relates to optical fiber communication technology, in particular to a system and method for processing frame switching in the process of converting FC frames to SRIO frames.

Background technique

With the development of the scale of network interconnection, one-to-many or many-to-many protocol conversion devices appear. Taking FC and srio conversion as an example, there may be multiple FC ports to one srio port or multiple FC ports to multiple The case of a srio port. In this environment, the protocol conversion device is required to be able to process the conversion of frames sent by different FC ports, so it may exist that when a certain FC frame has not been transmitted, but there are new urgent FC frames (high priority frames) that need to be transmitted question.

However, the current protocol conversion technology cannot handle the problem of multiple frame alternation/frame switching well. For example, the prior art discloses "A Compatible Network High Real-time Data Transmission Device and Method" (application number: 202210381729.2), which includes: the data link layer and physical layer of the OSI system, and the data link layer includes a MAC client It supports preemption function module, MAC control module and MAC merging module. The physical layer includes a coordination sublayer module and a PHY module. The method includes low priority data slicing, low priority frame packaging, slice combination and combination verification.

In fact, this method mainly involves solving the problem of frame preemption in Ethernet. Although there are inspirations for solving the frame switching scheme in the process of converting FC frames to srio frames in this case, the scheme recorded in it has high priority when the preemption switch is turned on. The low-priority frames are cut off from the low-priority frames, and the cut-off low-priority frames are reassembled at the receiving end. Therefore, frames in this technology are only divided into high priority and low priority according to priority. High priority can cut off low priority frames, while high priority can no longer be preempted by higher priority, that is, only 2 levels of priority/one interrupt.

Contents of the invention

For this reason, the main purpose of the present invention is to provide a system and method for processing frame switching in the process of converting FC frames to srio frames, to support the processing of multiple frame alternation/frame switching, so that the data frames in the communication process are allowed to be played multiple times broken.

In order to achieve the above object, according to the first aspect of the present invention, a system for processing frame switching in the process of converting FC frame to srio frame is provided, which includes:

The FC frame disassembly module is used to receive the FC frames of each channel and disassemble the first data;

An interconnection module, configured to obtain first data from each FC frame dismantling module according to preset rules, to send to the data processing module;

Wherein the data processing module includes: a frame content FIFO unit, a continued transmission recording unit, a frame information recording unit, a srio framing unit,

The frame content FIFO unit is used to obtain and store content data and content length in the first data,

The frame information recording unit stores a first mapping table for obtaining the channel number of the first data and then looking up the table to obtain the corresponding target data,

The continuation recording unit is used to store the descriptor data of the interrupted first data when the first data of different channels are interrupted by frame insertion; to feed back the corresponding descriptor data according to the channel number when the continuation is continued. transmitting the remaining content data of the first data;

The srio framing unit is used to integrate the content data and target data of the first data, or the continued content data and descriptor data into an srio frame for output.

In a possible preferred implementation, the preset rule is a polling mechanism rule, and the interconnection module uses a polling mechanism to sequentially switch channels according to a specified number of beats to obtain the first data transmitted by each FC frame disassembly module.

In a possible preferred implementation, the preset rule is a priority preemption rule, and the interconnection module switches channels according to the priority of each channel, obtains the first data transmitted by each FC frame disassembly module, and allows high priority Interrupt transmissions on low priority channels.

In a possible preferred implementation manner, the first data includes: payload data, a sof start tag, an eof end tag, and a channel number, wherein the payload data is content data.

In a possible preferred implementation manner, the target data includes: srio_addr, source srio ID, and destination srioID.

In a possible preferred implementation, the step of obtaining the descriptor data includes: when it is detected that the channel number changes and the eof end mark of the current first data is not received, include the current first data channel number corresponding to : The source srio ID, destination srio ID, srio_addr and content length are used as descriptor data and stored in the resume record unit.

In addition, corresponding to the system of the first aspect of the present invention, the second aspect of the present invention also provides a method for processing frame switching in the process of converting FC frames to srio frames, the steps of which include:

The S100 interconnection module obtains the first data of each channel from each FC frame dismantling module according to preset rules, and sends it to the data processing module;

S200 The data processing module receives the first data, obtains the content data and content length; at the same time, when receiving the sof start tag, finds the target data according to the corresponding channel number; when receiving the eof end tag, sends the target data together with the content data to srio framing unit;

When the data processing module detects that the channel number changes and does not receive the eof end mark of the previous frame, it stores the descriptor data of the interrupted first data; when the transmission is resumed, the corresponding descriptor data is fed back according to the channel number to continue After transmitting the remaining content data of the first data, send it together with the descriptor data to the srio framing unit;

The S300 srio framing unit integrates the content data of the first data and its target data, or the continued content data and its descriptor data into an srio frame output.

In a possible preferred implementation, the step of obtaining the descriptor data includes: when it is detected that the channel number changes and the eof end mark of the current first data is not received, include the current first data channel number corresponding to : The source srio ID, destination srio ID, srio_addr and content length are used as descriptor data and stored in the resume record unit.

In a possible preferred implementation, the preset rule is a polling mechanism rule, and the interconnection module uses a polling mechanism to sequentially switch channels according to a specified number of beats to obtain the first data transmitted by each FC frame disassembly module.

In a possible preferred implementation, the preset rule is a priority preemption rule, and the interconnection module switches channels according to the priority of each channel, obtains the first data transmitted by each FC frame disassembly module, and allows high priority Interrupt transmissions on low priority channels.

The system and method for processing frame switching in the process of converting FC frames to srio frames provided by the present invention can support the alternate transmission of multiple FC data streams in the process of converting FC frames to srio frames, realize accurate transmission of data streams, and It supports the interleaving of multiple streams and the case where frames are interrupted unlimited times.

Description of drawings

The accompanying drawings constituting a part of this application are used to provide further understanding of the present invention, and the schematic embodiments and descriptions of the present invention are used to explain the present invention, and do not constitute an improper limitation of the present invention. In the attached picture:

Fig. 1 is a schematic diagram of the system structure of the first embodiment of the present invention;

Fig. 2 is a schematic structural diagram of the data processing module of the first embodiment of the present invention;

FIG. 3 is a schematic structural diagram of the FC frame and the first data after it has been disassembled in the first embodiment of the present invention;

4 is a schematic structural diagram of the first data content output from the interconnection module to the data processing module under the polling mechanism in the first embodiment of the present invention;

5 is a schematic diagram of the structure of the first data content output from the interconnection module to the data processing module under the priority preemption rule in the first embodiment of the present invention;

Fig. 6 is a schematic diagram of the srio frame structure in the first embodiment of the present invention;

Fig. 7 is a schematic diagram of method steps in the second embodiment of the present invention.

Detailed ways

In order to enable those skilled in the art to better understand the technical solutions of the present invention, the specific technical solutions of the present invention will be clearly and completely described below in conjunction with examples, so as to help those skilled in the art further understand the present invention. Apparently, the embodiments described in this case are only some embodiments of the present invention, not all embodiments. It should be noted that, for those skilled in the art, the embodiments in the present application and the features in the embodiments can be combined without departing from the concept of the present invention and without conflicting with each other. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall belong to the disclosure and protection scope of the present invention.

In addition, the terms "first", "second", "S1", "S2" and the like in the description and claims of the present invention and the drawings are used to distinguish similar objects, not necessarily to describe a specific order or priority. It should be understood that the data so used may be interchanged under appropriate circumstances such that the embodiments of the invention described herein can be practiced in sequences other than those described herein. Meanwhile, the terms "including" and "having" and any variations thereof in the present invention are intended to cover non-exclusive inclusion. Unless otherwise clearly specified and limited, the terms "arrangement", "arrangement", "installation", "connection" and "connection" should be interpreted in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integrated Ground connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediary, and it can be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in this case according to specific situations and in combination with the prior art.

(one)

Please refer to Figure 1, which illustrates the scenario where protocol conversion is required on multiple FC ports. In this scenario, the FC frame enters the FC frame disassembly module, and the FC frame disassembly module disassembles the FC frame, and outputs data such as payload data, sof (frame start marker), eof (frame end marker), channel number, etc. and descriptor information.

When the data streams output by multiple FC frame dismantling modules are input to the interconnection module, the interconnection module uses the polling mechanism to route the input data, such as switching channels every 32 clock cycles. At this time, the data processing module (input FC data processing and integration The problems faced by outputting srio frames) are as follows:

Receive the data flow corresponding to FC frame 1, start processing, when the eof (frame end mark) signal of FC frame 1 is not received (the content of FC frame 1 is not completely transmitted), the relevant data transmission of FC frame 1 is interrupted, and the FC frame starts to be received 2 Corresponding to the data stream...After completing one round of polling, start the second round of polling, and the data stream corresponding to FC frame 1 continues to be transmitted. At this time, the data processing module is required to be able to identify broken frames and continue processing.

In order to adapt to the above processing requirements, as shown in Figures 1 to 6, the present invention provides a system for processing frame switching in the process of converting FC frames to srio frames, which includes:

The FC frame disassembly module is used to receive the FC frames of each channel and disassemble the first data, as shown in Figure 3, which illustrates the format of the FC frame, and the disassembled first data includes: payload data, sof Start marker, eof end marker, channel number.

The interconnection module is used to obtain the first data from each FC frame dismantling module respectively according to preset rules, so as to send it to the data processing module.

In this example, the interconnection module can control frame switching. If the preset rule adopts the polling mechanism, the next channel will be switched after receiving the data of the specified number of beats. For example, the next channel will be switched every time 32 beats of valid data are received. The frame, as shown in FIG. 4 , illustrates the first data content output from the interconnection module to the data processing module under the polling mechanism.

If the preset rule is a priority preemption rule, that is, a high priority frame interrupts a low priority frame, then if a high priority frame is input, the frame currently being transmitted is immediately interrupted, and the high priority frame is transmitted to obtain Each corresponds to the first data transmitted by the FC frame dismantling module. As shown in Figure 5, it illustrates the first data content output from the interconnection module to the data processing module under the priority preemption rule. In the example, the larger the priority number, the higher the priority, and the number of priority levels that can be supported is theoretically unlimited. .

As shown in FIG. 2 , the data processing module includes: a frame content FIFO unit, a continuous transmission recording unit, a frame information recording unit, and a srio framing unit.

The frame content FIFO unit is used to obtain and store payload content data and content length in the first data.

The frame information recording unit stores a first mapping table, which is used to obtain the channel number of the first data and then look up the table to obtain the corresponding target data. In this example, the target data includes: srio_addr, source srio ID, and destination srio ID .

The continuation recording unit is used to store the descriptor data of the interrupted first data when the first data of different channels is interrupted by frame insertion, so as to feed back the corresponding descriptor data according to the channel number when the continuation is resumed. Pass the remaining content data of the first data.

In this example, the step of obtaining the descriptor data includes: when it is detected that the channel number has changed and the eof end mark of the current first data has not been received, the current first data channel number corresponding to include: source The srio ID, destination srio ID, srio_addr and content length are used as descriptor data and stored in the resume record unit.

The srio framing unit is used to integrate the content data and target data of the first data, or the continued content data and descriptor data into an output srio frame as shown in FIG. 6 .

The following examples illustrate the working process of the data processing module.

When there is only one FC stream, the payload data of the FC frame is input into the frame content FIFO unit for storage, and the amount of payload data (frame content length) stored in the FIFO is recorded at the same time.

When the frame header sof is received, the channel number output by the FC frame disassembly module is input into the first mapping table of the frame information recording unit (hereinafter referred to as Table 1), and the corresponding srio_addr, source srio ID, and destination srio ID are queried.

Among them, Table 1 is used to query the corresponding relationship between the channel number and srio_addr, source srio ID, and destination srio ID, which can be realized through ram or cam, and the contents of the table can be configured through the host computer.

When the frame end flag eof is received, it marks the completion of the complete FC frame transmission. At this time, the frame content, srio_addr, source srio ID, destination srio ID, sof and eof mark, and frame content length are sent to the srio framing module.

At this time, the srio framing module divides the frame content of the input data, and integrates it into srio frames and sends them out (refer to the applicant's previous case to implement "a large-scale SRIO high-speed information exchange system and its information exchange method" application number: 2022105981605 ).

When multiple FC streams are input, and a certain FC frame A is interrupted by another FC frame B when it is not completely finished, the input terminal of the data processing module detects that the channel number changes.

Frame A process 1:

1. Receive the frame header sof_A of frame A, enter the channel number A of frame A into Table 1, and query the corresponding srio_addr_A, source srio ID_A, and destination srio ID_A;

2. The frame content payload A is input to the frame content FIFO for storage, and the frame content length L_A input to the FIFO is recorded at the same time;

At this time frame B is input and frame A is interrupted

3. The input terminal of the module detects that the input channel number has changed, and the end marker eof_A of frame A has not been received at this time;

4. Input the source srio ID_A, destination srio ID_A and srio_addr_new_A corresponding to the channel number A into the continuation recording unit, wherein the source srio ID_A and the destination srio ID_A are from Table 1, and srio_addr_new_A=srio_addr_A+L_A;

5. Send the frame content payload A, srio_addr_A, source srio ID_A, destination srio ID_A, sof_A (with, mark 1) and eof_A (no, mark 0), frame A cached content length L_A to the srio framing module;

6. The srio framing module divides the frame content of the input data, and integrates it into srio frames and sends them out.

Frame B process:

1. Receive the frame header sof_B of frame B, input the channel number _B of frame B into Table 1, and query the corresponding srio_addr_B, source srio ID_B, and destination srio ID_B;

2. The frame content payload B is input to the frame content FIFO for storage, and the frame content length L_B input to the FIFO is recorded at the same time;

3. The end flag eof_B of frame B is received, marking the completion of transmission of complete FC frame B;

4. Send the frame content payload B, srio_addr_B, source srio ID_B, destination srio ID_B, sof_B and eof_B marks, frame content length L_B to the srio framing module;

5. The srio framing module divides the input data into frame content, and integrates them into srio frames and sends them out.

Resume frame A, that is, frame A process 2:

1. The input terminal detects that the input channel number has changed (switching from frame B back to frame A), and the start marker sof_A of frame A has not been received at this time;

2. Input the channel number of frame A into the continuous transmission recording unit, and query the corresponding srio_addr_new_A, source srio ID_A, and destination srio ID_A;

3. The continued frame content A2 is input into the frame content FIFO for storage, and the frame content length L_A2 input into the FIFO is recorded at the same time;

4. The end flag eof_A of frame A is received, marking the completion of transmission of complete FC frame A;

5. Send the frame content_A2, srio_addr_new_A, source srio ID_A, destination srio ID_A, sof_A and eof_A mark, frame content length L_A2 to the srio framing module;

6. The srio framing module divides the frame content of the input data, and integrates it into srio frames and sends them out.

If frame A is interrupted again during the continuation process, iteratively update the content in the continuation record unit, in which the source srio ID_A and destination srio ID_A retain the original values, srio_addr_new_A=srio_addr_new_A+L_A2; when the continuation is resumed, query The corresponding value is obtained by continuing the recording unit.

If frame B is interrupted by frame C during transmission, its process refers to frame A process 1.

It can be seen that this scheme realizes accurate transmission of data streams when multiple streams are sent interleaved, and supports multiple streams interspersed, and frames are interrupted unlimited times.

(two)

As shown in Figure 7, corresponding to the system of Embodiment 1 of the present invention, the present invention also provides a method for processing frame switching in the process of converting FC frames to srio frames, the steps of which include:

The S100 interconnection module obtains the first data of each channel from each FC frame dismantling module according to preset rules, and sends it to the data processing module;

Wherein, in a possible example, the preset rule is a polling mechanism rule, and the interconnection module adopts a polling mechanism to switch channels in sequence according to the specified number of beats to obtain the first data transmitted by each FC frame disassembly module .

Wherein, in another possible example, the preset rule is a priority preemption rule, and the interconnection module switches channels according to the priority of each channel, obtains the first data transmitted by each FC frame disassembly module, and Allows high priority to interrupt the transmission of low priority channels.

S200 The data processing module receives the first data, obtains the content data and content length; at the same time, when receiving the sof start tag, finds the target data according to the corresponding channel number; when receiving the eof end tag, sends the target data together with the content data to the srio framing unit;

When the data processing module detects that the channel number changes and does not receive the eof end mark of the previous frame, it stores the descriptor data of the interrupted first data; when the transmission is resumed, the corresponding descriptor data is fed back according to the channel number to continue After transmitting the remaining content data of the first data, send it together with the descriptor data to the srio framing unit;

Wherein, in this example, the step of obtaining the descriptor data includes: when it is detected that the channel number has changed and the eof end mark of the current first data is not received, corresponding to the current first data channel number includes: The source srio ID, destination srio ID, srio_addr and content length are used as descriptor data and stored in the resume recording unit.

The S300 srio framing unit integrates the content data of the first data and its target data, or the continued content data and its descriptor data into an srio frame output.

In summary, the system and method for processing frame switching in the process of converting FC frames to srio frames provided by the present invention can support the alternate transmission of multiple FC data streams in the process of converting FC frames to srio frames, and realize accurate data flow. Error-free transmission, and supports the interleaving of multiple streams, and the case where frames are interrupted unlimited times.

The preferred embodiments of the invention disclosed above are only to help illustrate the invention. The preferred embodiments are not exhaustive in all detail, nor are the inventions limited to specific embodiments described. Obviously, many modifications and variations can be made based on the contents of this specification. This description selects and specifically describes these embodiments in order to better explain the principle and practical application of the present invention, so that those skilled in the art can well understand and utilize the present invention. The present invention is only limited by the claims and their full scope and equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention. Inside.

Those skilled in the art can understand that, in addition to realizing the system, device and each module provided by the present invention in a purely computer-readable program code mode, the system, device and each module provided by the present invention can be completely implemented by logically programming the method steps. Modules implement the same program in the form of logic gates, switches, application specific integrated circuits, programmable logic controllers, and embedded microcontrollers, among others. Therefore, the system, device and each module provided by the present invention can be regarded as a hardware component, and the modules included in it for realizing various programs can also be regarded as the structure in the hardware component; A module for realizing various functions can be regarded as either a software program realizing a method or a structure within a hardware component.

In addition, all or part of the steps in the method of the above-mentioned embodiments can be completed by instructing related hardware through a program. The program is stored in a storage medium and includes several instructions to make the single-chip microcomputer, chip or processor (processor) execute the present invention. Apply for all or part of the steps of the method described in each embodiment. The aforementioned storage media include: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic disk or optical disk, and other media capable of storing program codes.

In addition, various implementations of the embodiments of the present invention can also be combined arbitrarily, as long as they do not violate the idea of the embodiments of the present invention, they should also be regarded as the content disclosed in the embodiments of the present invention.

Claims (10)

1. a kind of system that handles frame switching in FC frame to srio frame process, is characterized in that comprising: The FC frame disassembly module is used to receive the FC frames of each channel and disassemble the first data; An interconnection module, configured to obtain first data from each FC frame dismantling module according to preset rules, to send to the data processing module; Wherein the data processing module includes: a frame content FIFO unit, a continued transmission recording unit, a frame information recording unit, a srio framing unit, The frame content FIFO unit is used to obtain and store content data and content length in the first data, The frame information recording unit stores a first mapping table for obtaining the channel number of the first data and then looking up the table to obtain the corresponding target data, The continuation recording unit is used to store the descriptor data of the interrupted first data when the first data of different channels are interrupted by frame insertion; to feed back the corresponding descriptor data according to the channel number when the continuation is continued. transmitting the remaining content data of the first data; The srio framing unit is used to integrate the content data and target data of the first data, or the continued content data and descriptor data into an srio frame for output. 2. The system according to claim 1, wherein the preset rule is a polling mechanism rule, and the interconnection module adopts a polling mechanism to switch channels in order to obtain dismantling of each FC frame according to the specified number of beats The first data transmitted by the module. 3. The system according to claim 1, wherein the preset rule is a priority preemption rule, and the interconnection module switches channels according to the priority of each channel, and obtains the first frame transmitted by each FC frame dismantling module. data, and allow high-priority channels to interrupt the transmission of low-priority channels. 4. The system according to claim 1, wherein the first data comprises: payload data, sof start tag, eof end tag, channel number, wherein the payload data is content data. 5. The system according to claim 1, wherein the target data comprises: srio_addr, source srioID, and destination srio ID. 6. The system according to claim 1, wherein the step of obtaining the descriptor data comprises: when it is detected that the channel number changes and the eof end mark of the current first data is not received, the current first data A data channel number corresponds to include: source srio ID, destination srio ID, srio_addr and content length as descriptor data, which are stored in the resume recording unit. 7. A method for processing frame switching in FC frame transfer srio frame process, characterized in that the steps include: The S100 interconnection module obtains the first data of each channel from each FC frame dismantling module according to preset rules, and sends it to the data processing module; S200 The data processing module receives the first data, obtains the content data and content length; at the same time, when receiving the sof start tag, finds the target data according to the corresponding channel number; when receiving the eof end tag, sends the target data together with the content data to the srio framing unit; When the data processing module detects that the channel number changes and does not receive the eof end mark of the previous frame, it stores the descriptor data of the interrupted first data; when the transmission is resumed, the corresponding descriptor data is fed back according to the channel number to continue After transmitting the remaining content data of the first data, send it together with the descriptor data to the srio framing unit; The S300 srio framing unit integrates the content data of the first data and its target data, or the continued content data and its descriptor data into an srio frame output. 8. The method according to claim 7, wherein the step of obtaining the descriptor data comprises: when it is detected that the channel number changes and the eof end mark of the current first data is not received, the current first data A data channel number corresponds to include: source srio ID, destination srio ID, srio_addr and content length as descriptor data, which are stored in the resume recording unit. 9. The method according to claim 7, wherein the preset rule is a polling mechanism rule, and the interconnection module adopts a polling mechanism to switch channels in order to obtain dismantling of each FC frame according to the specified number of beats The first data transmitted by the module. 10. The method according to claim 7, wherein the preset rule is a priority preemption rule, and the interconnection module switches channels according to the priority of each channel, and obtains the first frame transmitted by each FC frame dismantling module. data, and allow high-priority channels to interrupt the transmission of low-priority channels.

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