CN111817904A - Bandwidth recovery method, device and medium based on PCIE Switch - Google Patents

Abstract

The embodiment of the present invention discloses a bandwidth recovery method, device and medium based on PCIE Switch, which acquires the cable connection state and link bandwidth of the downlink port; when it is detected that the cable connection status and link bandwidth of the downlink port meet the recovery conditions When , the connection flag bit in the connection control register can be adjusted to the first state to trigger the system to remove the cable connected to the downlink port. The effect of cable removal is achieved through software simulation. After the triggering system removes the cable connected to the downlink port, the connection flag bit in the connection control register can be adjusted to the second state again to trigger the system to re-add the cable connected to the downlink port. At this time, the system can recognize the All cables connected to the downlink port, so that the link bandwidth of the downlink port matches the number of cables actually connected to the downlink port, which solves the problem that the specified link bandwidth cannot be formed when multiple cables are connected.

Description

Bandwidth recovery method, device and medium based on PCIE Switch

technical field

The present invention relates to the technical field of storage systems, and in particular, to a PCIE Switch-based bandwidth recovery method, device, and computer-readable storage medium.

Background technique

In recent years, with the continuous improvement of users' requirements for integration, unification, efficiency, space, and energy consumption, there are many new scenarios for the use of PCIE Switch. The miniSAS cable connection constitutes a x16 bandwidth link, and the cable supports hot plugging.

During use, the cables are inserted one by one in sequence. After the first cable is inserted, the PCIE link will automatically negotiate, and the link bandwidth after negotiation is x4. When the remaining three cables are inserted later, due to the specification of PCIE, the PCIE link will not automatically negotiate, and the bandwidth will always be Remains in the x4 state and cannot reach the designed x16 bandwidth.

It can be seen that how to solve the problem that a specified link bandwidth cannot be formed by connecting multiple cables is a problem to be solved by those skilled in the art.

SUMMARY OF THE INVENTION

The purpose of the embodiments of the present invention is to provide a bandwidth recovery method, device and computer-readable storage medium based on PCIE Switch, which can solve the problem that a specified link bandwidth cannot be formed by connecting multiple cables.

In order to solve the above technical problem, an embodiment of the present invention provides a bandwidth recovery method based on PCIE Switch, including:

Get the cable connection status and link bandwidth of the downlink port;

When it is detected that the cable connection state of the downlink port and the link bandwidth meet the recovery conditions, the connection flag bit in the connection control register is adjusted to the first state, so as to trigger the system to remove the cable connected to the downlink port;

The connection flag bit in the connection control register is adjusted to the second state to trigger the system to re-add the cable connected to the downlink port.

Optionally, the process of detecting whether the connection state of the downlink cable and the link bandwidth meet the recovery condition includes:

Determine whether the four cables of the downlink port are all connected;

When the four cables of the downlink port are all connected, read the current link bandwidth from the connection control register;

Determine whether the current link bandwidth is less than the set link bandwidth;

When the current link bandwidth is less than the set link bandwidth, the step of adjusting the connection flag bit in the connection control register to the first state is executed to trigger the system to remove the cable connected to the downlink port.

Optionally, after the judging whether the four cables of the downlink port are all in a connected state, the method further includes:

When the downlink port does not satisfy that all four cables are in the connected state within the preset time period, a prompt message indicating that the cable connection fails is displayed.

Optionally, the acquiring the connection status and link bandwidth of the downlink cable includes:

Read the cable in-bit signal and the current link bandwidth recorded in the connection control register according to the set cycle time.

Optionally, after adjusting the connection flag bit in the connection control register to the second state to trigger the system to re-add the cable connected to the downlink port, the method further includes:

Determine whether the current link bandwidth of the downlink port reaches the set link bandwidth;

When the current link bandwidth of the downlink port does not reach the set link bandwidth, return to the first state after a preset time interval to adjust the connection flag in the connection control register to trigger the system to switch the downlink port to the first state. Connected cable removal steps.

The embodiment of the present invention also provides a bandwidth recovery device based on PCIE Switch, including an acquisition unit, a first adjustment unit and a second adjustment unit;

the obtaining unit, configured to obtain the cable connection status and link bandwidth of the downlink port;

The first adjustment unit is configured to adjust the connection flag bit in the connection control register to the first state when it is detected that the cable connection state of the downlink port and the link bandwidth satisfy the recovery condition, so as to trigger the system to switch the downlink port to the first state. The connected cable is removed;

The second adjustment unit is configured to adjust the connection flag bit in the connection control register to a second state, so as to trigger the system to re-add the cable connected to the downlink port.

Optionally, for the detection process of the connection state of the downlink cable and whether the link bandwidth meets the recovery condition, the device includes a first judgment unit, a reading unit, and a second judgment unit;

the first judging unit, configured to judge whether the four cables of the downlink port are all connected;

The reading unit is configured to read the current link bandwidth from the connection control register when the four cables of the downlink port are all connected;

The second judgment unit is configured to judge whether the current link bandwidth is less than the set link bandwidth; when the current link bandwidth is less than the set link bandwidth, trigger the first adjustment unit.

Optionally, it also includes a prompting unit;

The prompting unit is configured to display prompt information of cable connection failure when the downlink port does not satisfy that all four cables are in a connected state within a preset time period.

Optionally, the obtaining unit is specifically configured to read the cable presence signal and the current link bandwidth recorded in the connection control register according to the set period time.

Optionally, after adjusting the connection flag bit in the connection control register to the second state to trigger the system to re-add the cable connected to the downlink port, it also includes a judgment unit and a return unit;

The judging unit is used to judge whether the current link bandwidth of the downlink port reaches the set link bandwidth;

The returning unit is configured to trigger the first adjustment unit after a preset time period when the current link bandwidth of the downlink port does not reach the set link bandwidth.

The embodiment of the present invention also provides a bandwidth recovery device based on PCIE Switch, including:

memory for storing computer programs;

The processor is configured to execute the computer program to implement the steps of the PCIE Switch-based bandwidth recovery method according to any one of the above.

An embodiment of the present invention further provides a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the PCIESwitch-based bandwidth recovery according to any one of the above-mentioned items is implemented. steps of the method.

It can be seen from the above technical solutions that the cable connection status and link bandwidth of the downlink port are obtained; when it is detected that the cable connection status and link bandwidth of the downlink port meet the recovery conditions, the link bandwidth of the downlink port is indicated. It does not meet the actual bandwidth requirements. At this time, the connection flag bit in the connection control register can be adjusted to the first state to trigger the system to remove the cable connected to the downlink port. The effect of cable removal is achieved through software simulation. After the triggering system removes the cable connected to the downlink port, the connection flag bit in the connection control register can be adjusted to the second state again to trigger the system to re-add the cable connected to the downlink port. At this time, the system can recognize the All cables connected to the downlink port, so that the link bandwidth of the downlink port matches the number of cables actually connected to the downlink port, which solves the problem that the specified link bandwidth cannot be formed when multiple cables are connected.

Description of drawings

In order to explain the embodiments of the present invention more clearly, the following will briefly introduce the accompanying drawings that need to be used in the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention, which are not relevant to ordinary skills in the art. As far as personnel are concerned, other drawings can also be obtained from these drawings on the premise of no creative work.

FIG. 1 is a flowchart of a PCIE Switch-based bandwidth recovery method provided by an embodiment of the present invention;

2 is a schematic structural diagram of a PCIE Switch-based bandwidth recovery device provided by an embodiment of the present invention;

FIG. 3 is a schematic diagram of a hardware structure of a bandwidth recovery device based on a PCIE Switch according to an embodiment of the present invention.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

In order to make those skilled in the art better understand the solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

Next, a bandwidth recovery method based on a PCIE Switch provided by an embodiment of the present invention is introduced in detail. 1 is a flowchart of a PCIE Switch-based bandwidth recovery method provided by an embodiment of the present invention, where the method includes:

S101: Acquire the cable connection state and link bandwidth of the downlink port.

In the embodiment of the present invention, an introduction is made by taking one bandwidth of the PCIE Switch as an x16 downlink port as an example. To reach the x16 link bandwidth, four cables need to be connected to the downlink port of the PCIE Switch.

In this embodiment of the present invention, the cable connection state of the downlink port can be identified by reading the cable presence signal.

The system can automatically identify whether a cable is inserted into the downstream port. When a cable is inserted into a port of the downstream port, the system will automatically record the cable presence signal corresponding to the port in the register. When a cable is inserted into a port of the downstream port, the cable presence signal corresponding to the port is "1"; when the cable is not inserted into the port of the downstream port, the cable presence signal corresponding to the port is "0".

Considering that the cables need to be inserted into the downlink port one by one, in order to obtain the actual connection status of the downlink port cable more accurately, you can read the cable presence signal and the current record in the connection control register according to the set cycle time. link bandwidth.

The value of the cycle time can be set depending on the time it takes for the cable to be inserted into the downlink port.

S102: When it is detected that the cable connection state of the downlink port and the link bandwidth satisfy the recovery condition, adjust the connection flag bit in the connection control register to the first state to trigger the system to remove the cable connected to the downlink port.

The recovery condition means that all the cables required by the downlink port are inserted, but the corresponding link bandwidth does not reach the bandwidth value matching the number of cables.

In order to insert four cables, in a specific implementation, it can be determined whether the four cables of the downlink port are all connected. When the four cables of the downlink port are all connected, it means that all cables to be inserted have been inserted into the downlink port, and the current link bandwidth can be read from the connection control register. Determine whether the current link bandwidth is less than the set link bandwidth.

When the current link bandwidth is less than the set link bandwidth, it means that the link bandwidth of the downlink interface does not meet the actual bandwidth requirements. At this time, the connection flag bit in the connection control register can be adjusted to the first state to trigger the system to Steps to remove the cable connected to the downstream port.

In the embodiment of the present invention, the automatic negotiation process of the link bandwidth is triggered by changing the connection flag bit in the register.

In practical applications, the connection flag position "0" may represent the first state, and the connection flag position "1" may represent the second state. When the connection flag is adjusted to the first state, the system will be triggered to go through the hot-plug process, and the effect of cable removal is achieved by software simulation.

S103: Adjust the connection flag bit in the connection control register to the second state to trigger the system to re-add the cable connected to the downlink port.

After the triggering system removes the cable connected to the downlink port, the connection flag bit in the connection control register can be adjusted to the second state again to trigger the system to re-add the cable connected to the downlink port. At this time, the system can recognize the All cables connected to the downlink port, so that the link bandwidth of the downlink port matches the number of cables actually connected to the downlink port.

Taking 4 cables as an example, by adjusting the connection flag in the connection control register to the second state, the system will be triggered to execute the hot-plug process and re-identify the cable connected to the downlink port. 4 cables have been connected at the same time, so the system can recognize the link bandwidth to x16, so that 4 cables reach the link bandwidth of x16.

In the embodiment of the present invention, after the connection flag bit in the connection control register is adjusted to the second state to trigger the system to rejoin the cable connected to the downlink port, it can be further determined whether the current link bandwidth of the downlink port reaches the set value. specified link bandwidth. When the current link bandwidth of the downlink port does not reach the set link bandwidth, return to S102 after a preset time period to re-adjust the connection flag bit in the connection control register to the first state, so as to trigger the system to connect the downlink port to the first state. Steps for cable removal.

It can be seen from the above technical solutions that the cable connection status and link bandwidth of the downlink port are obtained; when it is detected that the cable connection status and link bandwidth of the downlink port meet the recovery conditions, the link bandwidth of the downlink port is indicated. It does not meet the actual bandwidth requirements. At this time, the connection flag bit in the connection control register can be adjusted to the first state to trigger the system to remove the cable connected to the downlink port. The effect of cable removal is achieved through software simulation. After the triggering system removes the cable connected to the downlink port, the connection flag bit in the connection control register can be adjusted to the second state again to trigger the system to re-add the cable connected to the downlink port. At this time, the system can recognize the All cables connected to the downlink port, so that the link bandwidth of the downlink port matches the number of cables actually connected to the downlink port, which solves the problem that the specified link bandwidth cannot be formed when multiple cables are connected.

Considering that in practical applications, there may be a cable inserted into the downstream port. Because the cable is not inserted properly, the insertion of the cable has not been detected. Taking four cables as an example, in order to facilitate users to find out if the cables are not plugged in properly, after judging whether the four cables of the downlink port are all connected, the system can further determine whether the downlink port is in the preset time period. All four cables are connected.

The preset time period can be set according to the time it takes for the four cables to be inserted into the downstream port.

When the downlink port does not meet the requirement that all four cables are connected within the preset time period, it means that the cable is most likely inserted into the downlink port, but the system cannot detect the connection of the cable because the cable is not inserted properly. If the downlink port does not meet the requirements of all four cables in the connected state within the set time period, the prompt information of cable connection failure can be displayed.

By setting the time for the change of the cable connection status, it is possible to find out in time that the cable is not plugged in properly, so that the cable connection cannot be recognized, so that the user can re-insert the cable into the downlink port.

FIG. 2 is a schematic structural diagram of a PCIE Switch-based bandwidth recovery device according to an embodiment of the present invention, including an acquisition unit 21, a first adjustment unit 22, and a second adjustment unit 23;

an acquisition unit 21, configured to acquire the cable connection status and link bandwidth of the downlink port;

The first adjustment unit 22 is used to adjust the connection flag bit in the connection control register to the first state when it is detected that the cable connection state of the downlink port and the link bandwidth satisfy the recovery condition, so as to trigger the system to connect the cable connected to the downlink port. cable removal;

The second adjustment unit 23 is configured to adjust the connection flag bit in the connection control register to the second state, so as to trigger the system to re-add the cable connected to the downlink port.

Optionally, for the detection process of the connection state of the downlink cable and whether the link bandwidth meets the recovery condition, the device includes a first judgment unit, a reading unit, and a second judgment unit;

a first judging unit for judging whether the four cables of the downlink port are all connected;

The reading unit is used to read the current link bandwidth from the connection control register when the four cables of the downlink port are all connected;

The second judgment unit is configured to judge whether the current link bandwidth is less than the set link bandwidth; when the current link bandwidth is less than the set link bandwidth, the first adjustment unit is triggered.

Optionally, it also includes a prompting unit;

The prompt unit is used to display the prompt information of cable connection failure when the downlink port does not satisfy that all four cables are in the connected state within the preset time period.

Optionally, the acquiring unit is specifically configured to read the cable presence signal and the current link bandwidth recorded in the connection control register according to the set period time.

Optionally, after adjusting the connection flag bit in the connection control register to the second state to trigger the system to rejoin the cable connected to the downlink port, it also includes a judgment unit and a return unit;

A judging unit for judging whether the current link bandwidth of the downlink port reaches the set link bandwidth;

The returning unit is configured to trigger the first adjustment unit after a preset time period when the current link bandwidth of the downlink port does not reach the set link bandwidth.

For the description of the features in the embodiment corresponding to FIG. 2 , reference may be made to the relevant description of the embodiment corresponding to FIG. 1 , which will not be repeated here.

It can be seen from the above technical solutions that the cable connection status and link bandwidth of the downlink port are obtained; when it is detected that the cable connection status and link bandwidth of the downlink port meet the recovery conditions, the link bandwidth of the downlink port is indicated. It does not meet the actual bandwidth requirements. At this time, the connection flag bit in the connection control register can be adjusted to the first state to trigger the system to remove the cable connected to the downlink port. The effect of cable removal is achieved through software simulation. After the triggering system removes the cable connected to the downlink port, the connection flag bit in the connection control register can be adjusted to the second state again to trigger the system to re-add the cable connected to the downlink port. At this time, the system can recognize the All cables connected to the downlink port, so that the link bandwidth of the downlink port matches the number of cables actually connected to the downlink port, which solves the problem that the specified link bandwidth cannot be formed when multiple cables are connected.

3 is a schematic diagram of a hardware structure of a PCIE Switch-based bandwidth recovery device 30 provided by an embodiment of the present invention, including:

memory 31 for storing computer programs;

The processor 32 is configured to execute a computer program to implement the steps of the bandwidth recovery method based on the PCIE Switch according to any of the foregoing embodiments.

Embodiments of the present invention further provide a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the bandwidth recovery method based on the PCIE Switch described in any of the foregoing embodiments is implemented. step.

A PCIE Switch-based bandwidth recovery method, device, and computer-readable storage medium provided by the embodiments of the present invention are described above in detail. The various embodiments in the specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments, and the same and similar parts between the various embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant part can be referred to the description of the method. It should be pointed out that for those skilled in the art, without departing from the principle of the present invention, several improvements and modifications can also be made to the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Professionals may further realize that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of the two, in order to clearly illustrate the possibilities of hardware and software. Interchangeability, the above description has generally described the components and steps of each example in terms of function. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Skilled artisans may implement the described functionality using different methods for each particular application, but such implementations should not be considered beyond the scope of the present invention.

The steps of a method or algorithm described in conjunction with the embodiments disclosed herein may be directly implemented in hardware, a software module executed by a processor, or a combination of the two. Software modules can be placed in random access memory (RAM), internal memory, read only memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, removable disk, CD-ROM, or any other in the technical field. in any other known form of storage medium.

Claims (10)

1. A bandwidth recovery method based on PCIE Switch is characterized by comprising the following steps:

acquiring the cable connection state and link bandwidth of a downlink port;

when the cable connection state of the downlink port and the link bandwidth are detected to meet the recovery condition, adjusting a connection flag bit in a connection control register to a first state to trigger a system to remove the cable connected with the downlink port;

and adjusting the connection flag bit in the connection control register to be in a second state so as to trigger the system to rejoin the cable connected with the downlink port.

2. The PCIE Switch-based bandwidth recovery method according to claim 1, wherein the detection process of whether the connection state of the downstream port cable and the link bandwidth meet the recovery condition includes:

judging whether the four cables of the downlink port are in a connection state or not;

when the four cables of the downlink port are in a connection state, reading the current link bandwidth from the connection control register;

judging whether the current link bandwidth is smaller than a set link bandwidth or not;

and when the current link bandwidth is smaller than the set link bandwidth, executing the step of adjusting the connection flag bit in the connection control register to a first state so as to trigger the system to remove the cable connected with the downlink port.

3. The PCIE Switch-based bandwidth restoration method according to claim 2, wherein after the determining whether all four cables of the downstream port are in a connected state, the method further comprises:

and when the downlink port does not meet the condition that all four cables are in a connection state within a preset time period, displaying prompt information of cable connection failure.

4. The PCIE Switch-based bandwidth recovery method of claim 1, wherein the obtaining the connection status of the downstream port cable and the link bandwidth comprises:

and reading the cable bit signal and the current link bandwidth recorded in the connection control register according to the set cycle time.

5. The PCIE Switch-based bandwidth restoration method according to any one of claims 1 to 4, wherein after the adjusting the connection flag bit in the connection control register to the second state to trigger the system to rejoin the cable connected to the downstream port, the method further comprises:

judging whether the current link bandwidth of the downlink port reaches the set link bandwidth or not;

and when the current link bandwidth of the downlink port does not reach the set link bandwidth, returning the connection flag bit in the adjustment connection control register to the first state after a preset time interval so as to trigger the system to remove the cable connected with the downlink port.

6. A bandwidth recovery device based on PCIE Switch is characterized by comprising an acquisition unit, a first adjusting unit and a second adjusting unit;

the acquisition unit is used for acquiring the cable connection state and the link bandwidth of the downlink port;

the first adjusting unit is used for adjusting a connection flag bit in a connection control register to a first state to trigger a system to remove a cable connected with the downlink port when the cable connection state of the downlink port and the link bandwidth are detected to meet recovery conditions;

and the second adjusting unit is used for adjusting the connection flag bit in the connection control register to be in a second state so as to trigger the system to rejoin the cable connected with the downlink port.

7. The PCIE Switch-based bandwidth recovery apparatus according to claim 6, wherein for a detection process of whether a connection state of the downstream port cable and a link bandwidth meet a recovery condition, the apparatus comprises a first determining unit, a reading unit, and a second determining unit;

the first judging unit is used for judging whether the four cables of the downlink port are in a connection state or not;

the reading unit is used for reading the current link bandwidth from the connection control register when the four cables of the downlink port are in a connection state;

the second judging unit is configured to judge whether the current link bandwidth is smaller than a set link bandwidth; and when the current link bandwidth is smaller than the set link bandwidth, triggering the first adjusting unit.

8. The PCIE Switch-based bandwidth restoration apparatus according to claim 7, further comprising a hint unit;

and the prompting unit is used for displaying the prompting information of the cable connection failure when the downlink port does not meet the condition that the four cables are in the connection state within the preset time period.

9. A bandwidth recovery device based on PCIE Switch is characterized in that the device comprises:

a memory for storing a computer program;

a processor configured to execute the computer program to implement the steps of the pcie switch based bandwidth restoration method according to any one of claims 1 to 5.

10. A computer-readable storage medium, having stored thereon a computer program which, when executed by a processor, implements the steps of the pcie switch based bandwidth restoration method according to any one of claims 1 to 5.

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