CN111147401A

CN111147401A - PHY card hot plug method and device

Info

Publication number: CN111147401A
Application number: CN201911330295.8A
Authority: CN
Inventors: 张连聘; 李奇
Original assignee: Suzhou Inspur Intelligent Technology Co Ltd
Current assignee: Suzhou Inspur Intelligent Technology Co Ltd
Priority date: 2019-12-20
Filing date: 2019-12-20
Publication date: 2020-05-12
Anticipated expiration: 2039-12-20
Also published as: CN111147401B

Abstract

The invention discloses a PHY card hot plug method and a device, comprising the following steps: triggering a hardware interrupt to load or remove a PHY driver in response to a PHY card hot plug or hot unplug occurring; responding to the loading of the PHY driver, acquiring the type of the PHY card and configuring working parameters of the PHY card according to the type of the PHY card; in response to loading or removing the PHY driver, the status scanning service of the corresponding port of the PHY card is started or stopped. The invention can support the hot plug requirement of the PHY card, meet the requirement of customers and improve the working efficiency.

Description

PHY card hot plug method and device

Technical Field

The present invention relates to the field of switches, and in particular, to a PHY card hot plug method and apparatus.

Background

In the switching field, core layer switches with a large number of ports are typically designed in the form of multiple PHY (ethernet physical layer) cards, and due to traffic demands, these cards are typically expected to be designed in a hot-pluggable fashion. However, in the hot plug process, the power supply, the high-speed signal link and the low-speed signal link are affected on the hardware level; on the other hand, the driving layer does not support the hot plug function of the PHY card.

Aiming at the problem that the hot plug of the PHY card in the prior art is difficult to realize, no effective solution is available at present.

Disclosure of Invention

In view of this, an object of the embodiments of the present invention is to provide a PHY card hot plug method and apparatus, which can support the hot plug requirement of a PHY card, meet the customer requirement, and improve the working efficiency.

Based on the above object, a first aspect of the embodiments of the present invention provides a PHY card hot plug method, including the following steps:

triggering a hardware interrupt to load or remove a PHY driver in response to a PHY card hot plug or hot unplug occurring;

responding to the loading of the PHY driver, acquiring the type of the PHY card and configuring working parameters of the PHY card according to the type of the PHY card;

in response to loading or removing the PHY driver, the status scanning service of the corresponding port of the PHY card is started or stopped.

In some implementations, triggering a hardware interrupt to load or remove a PHY driver in response to a PHY card hot-plug or hot-unplug occurring includes:

sending a hardware interrupt signal by a complex logic programmable device on a mainboard in response to the PHY card hot plug or hot unplug;

the PHY driver is loaded or removed by the interrupt service routine in response to the central processor receiving a hardware interrupt signal.

In some embodiments, in response to loading the PHY driver, obtaining the PHY card type and configuring the operating parameters of the PHY card according to the PHY card type includes:

obtaining a PHY card type in response to loading the PHY driver;

configuring the interface type, error correction protocol and port rate of the PHY card according to the type of the PHY card;

and configuring polarity inversion and pre-emphasis parameters of the PHY card according to the type of the PHY card.

In some embodiments, configuring the interface type, error correction protocol, and port rate of the PHY card according to the PHY card type includes: the interface types, error correction protocols and port rates of the PHY cards on the chip side and the external side are respectively configured, and the data on the chip side and the external side are the same or different.

In some implementations, starting or stopping the status scan service of the corresponding port of the PHY card in response to loading or removing the PHY driver includes:

starting or stopping a scanning function called by the PHY driver to periodically scan the connection state of the corresponding port in response to loading or removing the PHY driver;

in response to the scan function starting or stopping, the status scan service of the corresponding port of the PHY card is started or stopped, respectively.

A second aspect of the present invention provides a PHY card hot plug apparatus, including:

a processor; and

a memory storing program code executable by the processor, the program code when executed performing the steps of:

obtaining a PHY card type in response to loading the PHY driver;

The invention has the following beneficial technical effects: according to the PHY card hot plug method and the PHY card hot plug device, the PHY driver is loaded or removed by triggering hardware interrupt in response to the occurrence of PHY card hot plug or hot plug; responding to the loading of the PHY driver, acquiring the type of the PHY card and configuring working parameters of the PHY card according to the type of the PHY card; the technical scheme of responding to the loading or removing of the PHY driver and starting or stopping the state scanning service of the corresponding port of the PHY card can support the hot plug requirement of the PHY card, meet the requirement of a client and improve the working efficiency.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic flow chart of a PHY card hot plug method according to the present invention;

fig. 2 is a detailed flowchart of the PHY card hot plug method according to the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the following embodiments of the present invention are described in further detail with reference to the accompanying drawings.

It should be noted that all expressions using "first" and "second" in the embodiments of the present invention are used for distinguishing two entities with the same name but different names or different parameters, and it should be noted that "first" and "second" are merely for convenience of description and should not be construed as limitations of the embodiments of the present invention, and they are not described in any more detail in the following embodiments.

In view of the foregoing, a first aspect of the embodiments of the present invention provides an embodiment of a method capable of supporting a hot plug requirement of a PHY card. Fig. 1 is a schematic flow chart illustrating a PHY card hot plug method according to the present invention.

The PHY card hot plug method, as shown in fig. 1, includes the following steps:

step S101: triggering a hardware interrupt to load or remove a PHY driver in response to a PHY card hot plug or hot unplug occurring;

step S103: responding to the loading of the PHY driver, acquiring the type of the PHY card and configuring working parameters of the PHY card according to the type of the PHY card;

step S105: in response to loading or removing the PHY driver, the status scanning service of the corresponding port of the PHY card is started or stopped.

The PHY card hot plug function is realized by firstly solving the problem that software needs to sense the real hot plug operation of hardware, and the method for sensing the PHY card hot plug event in the method uses an interrupt notification mechanism, when the PHY card is subjected to hot plug action, an FPGA (complex logic programmable device) on a mainboard can detect that the in-place state of the PHY card is changed, and then hardware interrupt can be sent to a CPU (central processing unit), so that the CPU senses that the PHY card is subjected to hot plug action. And after sensing the event, the driving layer starts to perform subsequent processing actions according to the plug-in and plug-out events.

During the hot-plug process, there is a power-down and power-up process of the PHY card, which means that the PHY card needs to reinitialize and clear the PHY driver. Generally, a PHY card requires a complicated initialization process after power-on reset. The method mainly comprises configuration of port mode and rate, configuration of polarity of a sending end and a receiving end, configuration of AN (automatic negotiation Ethernet communication rate), configuration of FEC (method for correcting error data by using redundant data) and the like. When the line card is unplugged, the presence of the PHY driver in the upper layer software becomes meaningless, requiring the PHY driver to be removed from the system. The system is implemented by judging the type of the PHY card after detecting the insertion of the PHY card and carrying out specific initialization operation according to the type of the PHY card. When the PHY card is detected to be pulled out, the drive of the corresponding PHY is cleared to ensure that the PHY card can be initialized normally when the line card is inserted next time.

When the switch processes user traffic, the connection state (UP/DOWN) of the port is treated as an important signal. Since the PHY card is a direct module for connecting external optical modules, attention needs to be paid to real-time connection states of respective ports of the PHY card. The PHY driver provides a function for acquiring the connection state of the specified port, and the function can be called by the port state scanning program. In order to acquire the Link state of the port in real time, the invention starts a port state scanning service on the drive layer, and the service acquires the port state periodically. Therefore, after the PHY card is unplugged, the port state of the PHY card cannot be obtained, and at this time, because the PHY card is not in place, it is not necessary to scan the port connection state of the unplugged PHY card, so the port state scanning function corresponding to the PHY card needs to be turned off. Similarly, when the PHY card is reinserted, the status scanning service of the port corresponding to the PHY card needs to be restarted.

It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by a computer program, which can be stored in a computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. The storage medium may be a magnetic disk, an optical disk, a read-only memory (ROM), a Random Access Memory (RAM), or the like. Embodiments of the computer program may achieve the same or similar effects as any of the preceding method embodiments to which it corresponds.

obtaining a PHY card type in response to loading the PHY driver;

The method disclosed according to an embodiment of the present invention may also be implemented as a computer program executed by a CPU (central processing unit), and the computer program may be stored in a computer-readable storage medium. The computer program, when executed by the CPU, performs the above-described functions defined in the method disclosed in the embodiments of the present invention. The above-described method steps and system elements may also be implemented using a controller and a computer-readable storage medium for storing a computer program for causing the controller to implement the functions of the above-described steps or elements.

The following further illustrates an embodiment of the present invention in accordance with the embodiment shown in fig. 2.

Referring to fig. 2, a hot-plug operation of a 100G PHY card will be described as an example. The chip model used by the 100G PHY card is BCM81724, the management PHY needs to use SMI (MDC/MDIO) (interface of the management PHY) bus, and the communication protocol is CL45 protocol. The model of the MAC chip connected with the BCM81724 is BCM56980, the communication signal between the MAC and the PHY is PAM4, and the communication signal of the optical module provided by the PHY to the outside is NRZ. BCM56980 provides an SMI management bus and the driver controls BCM81724 via an SMI controller that controls BCM56980, thereby enabling initialization operations of the PHY. When the insertion of the PHY card is detected, an initialization operation of the PHY card needs to be performed. The interface type of the PHY and MAC (switching chip) interconnection side is configured as PAM4, the FEC needs to be set as RS544, and the port rate is set as 100G; the interface type of the port side provided by the PHY to the outside is configured to be NRZ, the FEC is configured to be RS528, and the port rate is also configured to be 100G; after configuring the basic port mode, configuring the polarity inversion of the PHY to the externally provided port side, and finally configuring the pre-emphasis parameter; this concludes the configuration of the PHY. At this time, the status scan service inserted into the port corresponding to the PHY card needs to be opened. Here, the drive layer of the MAC has a service program that periodically scans the port state of the MAC, and on the basis of the service program, we register a return function, which reads the port state of the PHY, and gives a final result in combination with the port state of the MAC, and feeds back the result to the application layer. When the line card is pulled out, the driving program of the PHY is removed in the first step, and the status scanning service program of the port corresponding to the PHY card is stopped in the second step.

As can be seen from the foregoing embodiments, the PHY card hot plug method provided in the embodiments of the present invention loads or removes a PHY driver by triggering a hardware interrupt in response to a PHY card hot plug or hot plug occurring; obtaining a PHY card type to configure operating parameters of the PHY card in response to loading the PHY driver; the technical scheme of starting or stopping the state scanning service of the corresponding port of the PHY card in response to the loading or removing of the PHY driver can support the hot plug requirement of the PHY card, meet the customer requirement and improve the working efficiency.

It should be noted that, the above-mentioned PHY card hot plug method may have steps crossing, replacing, adding, or deleting, and therefore, these changes should also fall within the scope of the present invention, and should not limit the scope of the present invention to the above-mentioned embodiments.

In view of the above object, according to a second aspect of the embodiments of the present invention, an embodiment of an apparatus capable of supporting a hot plug requirement of a PHY card is provided. The PHY card hot plug device comprises:

a processor; and

responding to the loading of the PHY driver, acquiring a PHY card type and configuring working parameters of the PHY card according to the PHY card type;

obtaining a PHY card type in response to loading the PHY driver;

As can be seen from the foregoing embodiments, the PHY card hot plug apparatus according to the embodiments of the present invention triggers a hardware interrupt to load or remove a PHY driver in response to a PHY card hot plug or hot plug occurring; responding to the loading of the PHY driver, acquiring the type of the PHY card and configuring working parameters of the PHY card according to the type of the PHY card; the technical scheme of responding to the loading or removing of the PHY driver and starting or stopping the state scanning service of the corresponding port of the PHY card can support the hot plug requirement of the PHY card, meet the requirement of a client and improve the working efficiency.

It should be particularly noted that the above-mentioned embodiment of the PHY card hot plug apparatus employs the embodiment of the PHY card hot plug method to specifically describe the working process of each module, and those skilled in the art can easily think that these modules are applied to other embodiments of the PHY card hot plug method. Of course, since the steps in the PHY card hot plug method embodiment may be mutually intersected, replaced, added, or deleted, these reasonable permutation and combination transformations should also be included in the scope of the present invention for the PHY card hot plug apparatus, and should not limit the scope of the present invention to the embodiments.

The foregoing is an exemplary embodiment of the present disclosure, but it should be noted that various changes and modifications could be made herein without departing from the scope of the present disclosure as defined by the appended claims. The functions, steps and/or actions of the method claims in accordance with the disclosed embodiments described herein need not be performed in any particular order. Furthermore, although elements of the disclosed embodiments of the invention may be described or claimed in the singular, the plural is contemplated unless limitation to the singular is explicitly stated.

It should be understood that, as used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly supports the exception. It should also be understood that "and/or" as used herein is meant to include any and all possible combinations of one or more of the associated listed items. The numbers of the embodiments disclosed in the embodiments of the present invention are merely for description, and do not represent the merits of the embodiments.

It will be understood by those skilled in the art that all or part of the steps for implementing the above embodiments may be implemented by hardware, or may be implemented by a program instructing relevant hardware, where the program may be stored in a computer-readable storage medium, and the above-mentioned storage medium may be a read-only memory, a magnetic disk or an optical disk, etc.

Those of ordinary skill in the art will understand that: the discussion of any embodiment above is meant to be exemplary only, and is not intended to intimate that the scope of the disclosure, including the claims, of embodiments of the invention is limited to these examples; within the idea of an embodiment of the invention, also technical features in the above embodiment or in different embodiments may be combined and there are many other variations of the different aspects of an embodiment of the invention as described above, which are not provided in detail for the sake of brevity. Therefore, any omissions, modifications, substitutions, improvements, and the like that may be made without departing from the spirit and principles of the embodiments of the present invention are intended to be included within the scope of the embodiments of the present invention.

Claims

1. A PHY card hot plug method is characterized by comprising the following steps:

responding to the loading of the PHY driver, acquiring the PHY card type and configuring working parameters of the PHY card according to the PHY card type;

starting or stopping a status scanning service of a corresponding port of the PHY card in response to loading or removing the PHY driver.

2. The method of claim 1, wherein triggering a hardware interrupt to load or remove the PHY driver in response to the PHY card hot-plug or hot-unplug occurring comprises:

issuing a hardware interrupt signal by a complex logic programmable device on a motherboard in response to the PHY card hot-plug or hot-unplug occurring;

loading or removing the PHY driver by an interrupt service routine in response to a central processor receiving the hardware interrupt signal.

3. The method of claim 1, wherein obtaining the PHY card type and configuring operating parameters of the PHY card according to the PHY card type in response to loading the PHY driver comprises:

obtaining the PHY card type in response to loading the PHY driver;

configuring an interface type, an error correction protocol and a port rate of the PHY card according to the PHY card type;

4. The method of claim 3, wherein configuring the interface type, error correction protocol, and port rate of the PHY card according to the PHY card type comprises: and respectively configuring the interface type, the error correction protocol and the port rate of the PHY card at the chip side and the external side, wherein the data at the chip side and the external side are the same or different.

5. The method of claim 1, wherein starting or stopping state scanning services of the corresponding port of the PHY card in response to loading or removing the PHY driver comprises:

in response to loading or removing the PHY driver, starting or stopping a scanning function called by the PHY driver to periodically scan the connection state of the corresponding port;

responsive to the scan function starting or stopping, respectively starting or stopping state scan services of the corresponding port of the PHY card.

6. A PHY card hot swap apparatus, comprising:

a processor; and

7. The apparatus of claim 6, wherein triggering a hardware interrupt to load or remove the PHY driver in response to the PHY card hot-plug or hot-unplug occurring comprises:

8. The apparatus of claim 6, wherein, in response to loading the PHY driver, obtaining the PHY card type and configuring the operating parameters of the PHY card according to the PHY card type comprises:

obtaining the PHY card type in response to loading the PHY driver;

9. The apparatus of claim 8, wherein configuring the interface type, error correction protocol, and port rate of the PHY card according to the PHY card type comprises: and respectively configuring the interface type, the error correction protocol and the port rate of the PHY card at the chip side and the external side, wherein the data at the chip side and the external side are the same or different.

10. The apparatus of claim 6, wherein starting or stopping state scanning services of the corresponding port of the PHY card in response to loading or removing the PHY driver comprises:

starting or stopping a scanning function called by the PHY driver to periodically scan a connection state of the corresponding port in response to loading or removing the PHY driver;