CN220473935U - PCIE (peripheral component interface express) expansion system supporting identification detection - Google Patents

Abstract

The utility model relates to the technical field of computers, and provides a PCIE expansion system supporting identification detection, which is used for identifying and detecting PCIE module cards by a server motherboard, and comprises a detection control module used for detecting the identification condition of the PCIE module cards and controlling the state of the server motherboard according to the identification condition, a signal interaction module used for signal interaction between the server motherboard and the PCIE module cards, and an expansion interface module used for connecting various PCIE module cards. The detection control module comprises a BIOS unit, a processor unit and a CPLD unit. The signal interaction module comprises a main board expansion slot unit and an expansion card connection unit. The expansion interface module comprises at least one PCIE slot, a first pin and a second pin are arranged, the first pin is grounded, and the second pin is connected with a pull-up resistor. After restarting and starting, all PCIE module cards connected with a plurality of PCIE slots on the expansion card can be normally identified, and the stability of the server is improved.

Description

A PCIE extension system that supports identification and detection

Technical field

The utility model relates to the field of computer technology, and specifically relates to a PCIE expansion system that supports identification and detection.

Background technique

With the emergence of big data, high concurrency, artificial intelligence and other business scenarios, the requirements for server data processing capabilities are getting higher and higher. High-speed serial computer expansion bus standard PCIE, as a high-speed serial computer expansion bus standard, has the advantages of large bandwidth and strong data transmission capability. It is increasingly used for data transmission between central processing units (CPUs) and devices in server systems. PCIE is a high-speed serial computer bus standard that can be connected to various PCIE devices on the motherboard. It can also be made into a PCIE slot to connect different PCIE module cards according to different application requirements. It is necessary to comprehensively consider the motherboard PCB space resources and The chassis structure is designed.

In the existing technology, servers usually choose to use PCIE expansion cards to expand the number of PCIE slots to avoid placing a large number of PCIE slots on the motherboard, which will cause the problem of normal identification and the inability to accurately identify the in-place status of PCIE devices.

Utility model content

In view of the above-mentioned problems existing in the prior art, the present invention provides a PCIE expansion system that supports identification and detection, which can ensure that the server motherboard can normally identify multiple expansion cards on the expansion card during long-term operation and use after restarting and booting. All PCIE module cards connected to the PCIE slots can avoid the situation where some PCIE module cards are not recognized properly after the server enters the operating system and improve the stability of the server.

In the first aspect, embodiments of the present application provide a PCIE extension system that supports identification and detection, including a detection control module, a signal interaction module and an expansion interface module connected in sequence; the detection control module is used to detect the PCIE module card identification status and based on the identification The situation controls the server status; the signal interaction module is used for signal interaction between the server motherboard and the expansion card; the expansion interface module is used to connect various PCIE module cards.

In an optional solution of the first aspect, the detection control module includes a BIOS unit, a processor unit and a CPLD unit connected in sequence.

In yet another optional solution of the first aspect, the BIOS unit and the processor unit are connected through SPI signal communication.

In yet another optional solution of the first aspect, the processor unit and the CPLD unit are connected through I2C signal communication. Low-speed signals such as SPI signals and I2C signals are commonly used on servers, which can make development and design more convenient. The processor unit needs to use SPI signals for communication to read and load BIOS unit information.

In yet another optional solution of the first aspect, the signal interaction module includes a motherboard expansion slot unit and an expansion card connection unit.

In yet another optional solution of the first aspect, the expansion card connection unit in the signal interaction module is a golden finger.

In yet another optional solution of the first aspect, the expansion interface module includes at least one PCIE slot.

In yet another optional solution of the first aspect, the PCIE slot in the expansion interface module is provided with a first pin and a second pin, the first pin is connected to ground, and the second pin is connected to a pull-up resistor.

In another optional solution of the first aspect, the expansion interface module includes multiple PCIE slots, the first pins of the multiple PCIE slots are all grounded, and the second pins of the multiple PCIE slots are connected in parallel. Pull-up resistor.

In yet another optional solution of the first aspect, the CPLD unit in the detection control module is connected to the second pin of the PCIE slot in the expansion interface module through the signal interaction module.

The beneficial technical effects of this utility model include:

A PCIE extension system that supports identification and detection is proposed, which can realize the link establishment identification detection of the PCIE module card on the PCIE expansion card by the server motherboard during the power-on process, so as to avoid the server motherboard's occasional link establishment abnormality and the operating system being unable to operate normally. Identify the status of the PCIE module card and achieve stable and reliable identification of the module card inserted on the PCIE expansion card, which helps to improve the reliability of the PCIE expansion card and improve the reliability and scalability of the server motherboard.

Description of drawings

In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description These are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without exerting creative efforts.

Figure 1 is a block diagram of a PCIE extension system supporting identification and detection in the utility model;

Figure 2 is a flow chart of a PCIE extension method that supports identification and detection in the present invention.

Detailed ways

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application.

In the following introduction, the terms "first" and "second" are used for descriptive purposes only and shall not be understood as indicating or implying relative importance. The following description provides multiple embodiments of the present application. Different embodiments can be replaced or combined. Therefore, the present application can also be considered to include all possible combinations of the same and/or different embodiments described. Thus, if one embodiment contains features A, B, C, and another embodiment contains features B, D, then the application should also be considered to include all other possible combinations containing one or more of A, B, C, D embodiment, although this embodiment may not be explicitly documented in the following content.

The following description provides examples and does not limit the scope, applicability, or examples set forth in the claims. Changes may be made in the function and arrangement of the elements described without departing from the scope of the disclosure. Various procedures or components may be omitted, substituted, or added as appropriate from each example. For example, the described methods may be performed in a different order than that described, and various steps may be added, omitted, or combined. Additionally, features described with respect to some examples may be combined into other examples.

Example 1:

Referring to Figure 1, a PCIE expansion system supporting identification detection includes a detection control module, a signal interaction module and an expansion interface module connected in sequence. Enable signal interaction between the PCIE expansion card and the server motherboard, perform detection and control, and achieve stable and reliable identification of the PCIE module card.

The detection control module is used to detect the PCIE module card recognition and control the server status based on the recognition, including the BIOS unit, Basic Input Output System, processor CPU unit, Central Processor Unit and CPLD unit, Complex Programmable Logic Device, BIOS unit and The processor units are connected through SPI signal communication, and the processor unit and the CPLD unit are connected through I2C signal communication.

Furthermore, the model used by the BIOS unit is CYPRESS's S25FL128P0XMFI00, and the model used by the CPLD unit is Altera's EPM2210F324C5N.

The signal interaction module is used for signal interaction between the server motherboard and expansion cards, including the motherboard expansion slot unit and the expansion card connection unit.

Furthermore, the mainboard expansion slot unit is a non-standard PCIE high-speed connector, model HSEC8-1100-01-L-DV-A from Samtec, and the expansion card connection unit is a gold finger connector, which can be directly inserted into the signal interaction module. inside the motherboard expansion slot unit.

The expansion interface module is used to connect various PCIE module cards. The expansion interface module includes multiple PCIE slots. The PCIE slots include pin 1, PRSNT1# signal and pin 2, PRSNT2# signal. In the standard PCIE module card on, the PRSNT1# signal is connected to the PRSNT2# signal. The PCIE slot PRSNT2# signal corresponds to different pins depending on the signal bandwidth. PCIE X16 corresponds to the B81 pin, PCIEX8 corresponds to the B48 pin, PCIE X4 corresponds to the B31 pin, and PCIE X1 corresponds to the B17 pin.

Further, it includes three PCIE slots. PCIE slot 1 is a PCIE A PRSNT2# (B81, B48, B31, B17 pin) signal is connected in parallel and pulled up to 3.3V high level through a resistor.

The models of PCIE slot 2 and PCIE slot 3 are PCIE X8 connectors, and the model is Samtec's PCIE-098-02-F-D-TH. The PRSNT1# signals on PCIE slot 2 and PCIE slot 3 are lead out for grounding processing, while the three PRSNT2# (B48, B31, B17 pins) signals are lead out in parallel and pulled up to 3.3V high level through resistors.

The PRSNT2# signals of the three PCIE slots in the expansion interface module are connected to the CPLD unit of the mainboard detection control unit through the signal interaction unit. When the PCIE module card is not inserted into the slot of the expansion interface module, the PRSNT2# signal received by the CPLD unit is high level. When the PCIE module card is inserted into the slot of the expansion interface module, the PRSNT2# signal passes through the PCIE module card and The PRSNT1# signal is connected, and the PRSNT2# signal received by the CPLD unit is low level.

Therefore, the CPLD unit can determine the number of cards in the PCIE module through the high and low status of the PRSNT2# signal in the three slots in the expansion interface module and write it into the register. Then the processor unit can read the number in the register through I2C communication. The processor module CPU of the detection control module connects three sets of PCIE X8 buses to PCIE slots 1/2/3 on the PCIE expansion card through the motherboard expansion slot unit.

The PCIE expansion system consists of a server motherboard and a PCIE expansion card. The server motherboard includes the BIOS unit of the detection control module, the processor unit, the CPLD unit and the motherboard expansion slot unit of the signal interaction module. The PCIE expansion card includes an expansion card connection unit of the signal interaction module and PCIE slot 1, PCIE slot 2 and PCIE slot 3 of the expansion interface module.

Example 2:

Referring to Figure 2, a PCIE extension method that supports identification detection, based on a PCIE extension system that supports identification detection provided in Embodiment 1, includes the steps:

Step A, detect that the processor unit of the control module is powered on, load the BIOS unit, and read the number of PCIE devices that successfully established the link, recorded as A, and the number of PCIE devices on the server motherboard, recorded as B.

Step B. The CPLD unit detects the number of PCIE module cards on the expansion card through the high and low status of the PRSNT2# signal of the three PCIE slots on the PCIE expansion card. I2C communication reads the number of PCIE module cards in the CPLD unit, recorded as C.

Step C, determine whether the difference between A minus B is equal to C, and determine whether the number of PCIE devices that have been successfully established minus the number of PCIE devices on the server motherboard is equal to the number of PCIE module cards in place. If they are equal, enter the operation. If the system is not equal, the processor unit will restart, try to establish the link again, and return to step A until it is determined that they are equal. If it is determined that the PCIE module card on the expansion card cannot be properly established and recognized, the processor module of the detection control unit will restart during the BIOS loading stage and re-establish the link to ensure that the PCIE module card on the expansion card can be recognized normally under the operating system. Make sure the server is functioning properly.

Step D, determine whether the number of restarts is less than 3 times. If it is less than 3 times, return to step A. If it is not less than 3 times, it is determined that the PCIE module card is abnormal and directly enter the operating system. Since the server startup time cannot be too long, the number of restarts is limited. necessary.

Solve the problem that the PCIE module card connected to the slot on the expansion card cannot be recognized normally. There are three slots on the expansion card, and 1 to 3 PCIE cards can be inserted.

The utility model can ensure that when the expansion server motherboard is used for a long time, it can normally identify all the PCIE module cards connected to the multiple PCIE slots on the expansion card after restarting and starting up, so as to avoid the occasional link-building abnormality of the server when entering. After operating the system, some PCIE module cards are not recognized properly, which helps to improve the reliability of the PCIE expansion card and improve the stability, reliability and scalability of the server.

The above-described embodiments are only descriptions of preferred embodiments of the present invention, and do not limit the scope of the present utility model. Without departing from the design spirit of the present utility model, those of ordinary skill in the art will Various deformations and improvements made should fall within the protection scope of the present utility model.

Claims (10)

1. A PCIE expansion system that supports identification and detection, characterized in that it is used for identification and detection of PCIE module cards by server motherboards, including a detection control module, a signal interaction module and an expansion interface module connected in sequence; the detection control module is used for detection The PCIE module card identifies the status and controls the status of the server motherboard based on the identification; the signal interaction module is used for signal interaction between the server motherboard and the PCIE module card; the expansion interface module is used to connect various PCIE module cards. 2. A PCIE expansion system supporting identification detection according to claim 1, characterized in that the detection control module includes a BIOS unit, a processor unit and a CPLD unit connected in sequence. 3. A PCIE extension system supporting identification detection according to claim 2, characterized in that the BIOS unit and the processor unit are connected through SPI signal communication. 4. A PCIE extension system supporting identification detection according to claim 2, characterized in that the processor unit and the CPLD unit are connected through I2C signal communication. 5. A PCIE expansion system supporting identification detection according to claim 1, characterized in that the signal interaction module includes a mainboard expansion slot unit and an expansion card connection unit. 6. A PCIE expansion system supporting identification detection according to claim 5, characterized in that the expansion card connection unit in the signal interaction module is a golden finger. 7. A PCIE expansion system supporting identification detection according to claim 1, wherein the expansion interface module includes at least one PCIE slot. 8. A PCIE expansion system supporting identification detection according to claim 7, characterized in that the PCIE slot in the expansion interface module is provided with a first pin and a second pin, the first pin is grounded, and the second pin is grounded. The second pin is connected to the pull-up resistor. 9. A PCIE expansion system supporting identification detection according to claim 8, characterized in that the expansion interface module includes a plurality of PCIE slots, the first pins of the plurality of PCIE slots are all grounded, and the plurality of PCIE slots are grounded. After connecting the second pin of the slot in parallel, connect the pull-up resistor. 10. A PCIE expansion system that supports identification detection according to any one of claims 8 or 9, characterized in that the CPLD unit in the detection control module communicates with the second pin of the PCIE slot in the expansion interface module through the signal interaction module. feet connection.