CN112631688A - PCIe link quick starting method and device - Google Patents
PCIe link quick starting method and device Download PDFInfo
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- CN112631688A CN112631688A CN202011643493.2A CN202011643493A CN112631688A CN 112631688 A CN112631688 A CN 112631688A CN 202011643493 A CN202011643493 A CN 202011643493A CN 112631688 A CN112631688 A CN 112631688A
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- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F9/00—Arrangements for program control, e.g. control units
- G06F9/06—Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
- G06F9/44—Arrangements for executing specific programs
- G06F9/445—Program loading or initiating
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- G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F13/38—Information transfer, e.g. on bus
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- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2213/00—Indexing scheme relating to interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
Abstract
The invention provides a PCIe link quick starting method, which is applied to the abnormal starting process of a system and comprises the following steps: configuring the equalizing mode of the PCIe link into a mode of skipping equalizing Skip EQ; reading the equilibrium EQ parameters stored in the last starting; and applying the balanced EQ parameters saved in the last starting process to the current PCIe link. The method adopts a first starting process after the hardware environment is changed to execute an automatic equalization Auto EQ process, and stores the current equalization EQ parameter into a non-volatile memory NVRAM of a basic input and output system BIOS; when the system is abnormally started, the link signal equalization mode is selected, and the previous starting parameter is used, so that the starting time spent on link retraining is greatly reduced. The technology can be used for quick starting of equipment, reducing abnormal starting time of the server and also can be used for PCIe link stability verification.
Description
Technical Field
The invention relates to the technical field of CPU processors, in particular to a PCIe link quick starting method and a PCIe link quick starting device.
Background
In the starting process of the PCIe link, because different rate points need to be balanced in the starting process, as the bandwidth of the PCIe link increases, the starting time of the PCIe link also continuously increases, especially since 11 months in 2011, after the protocol PCIe4.0 comes out, the bandwidth is doubled compared with that PCIe3.0, and the link needs to be adjusted through signal balancing twice, which results in the increasing of the starting time. However, for some scenarios requiring fast start, the longer start time of the PCIe link will have a very bad effect on the user experience, and therefore, it is very important to shorten the start time of the link.
Disclosure of Invention
The PCIe link starting method and the PCIe link starting device provided by the invention can quickly start the PCIe link and improve the starting efficiency.
In a first aspect, the present invention provides a PCIe link fast start method, which is applied in an abnormal start process of a system, and includes:
configuring the equalizing mode of the PCIe link into a mode of skipping equalizing Skip EQ;
reading the equilibrium EQ parameters stored in the last starting;
and applying the balanced EQ parameters saved in the last starting process to the current PCIe link.
Optionally, applying the equalized EQ parameters saved at the last boot to the current PCIe link further includes:
the signal quality check is performed on the current PCIe link,
and when the signal quality of the current PCIe link does not meet the preset standard, retraining the equalized EQ parameters of the PCIe link.
Optionally, the retraining the equalized EQ parameters of the PCIe link further includes:
the equalized EQ parameters after retraining are saved to non-volatile memory NVRAM.
Optionally, the abnormal starting process comprises: and a starting process that the hardware environment is not changed when the hardware is started for the time relative to the hardware environment when the hardware is started for the last time.
In a second aspect, the present invention provides a PCIe link starting method, applied in a normal starting process of a system, including:
configure the PCIe link as a way to Auto equalize the Auto EQ;
carrying out balance training on the PCIe link according to an automatic balance Auto EQ mode;
and applying the equalization EQ parameters obtained by equalization training to the current PCIe link, and storing the current equalization EQ parameters into a non-volatile memory NVRAM.
Optionally, applying the equalized EQ parameters obtained by the equalization training to the current PCIe link further includes:
the signal quality check is performed on the current PCIe link,
and when the signal quality of the current PCIe link does not meet the preset standard, retraining the equalized EQ parameters of the PCIe link.
Optionally, the retraining the equalized EQ parameters of the PCIe link further includes:
the equalized EQ parameters after retraining are saved to non-volatile memory NVRAM.
Optionally, the normal start-up procedure comprises: and a starting process that the hardware environment is changed relative to the hardware environment when the hardware environment is started last time.
In a third aspect, the present invention further provides a PCIe link fast boot apparatus, including:
the equalizing mode selection module is used for configuring the PCIe link into a mode of skipping equalizing Skip EQ or a mode of automatically equalizing Auto EQ;
the parameter acquisition module is used for determining the equilibrium EQ parameter of the PCIe link in an automatic equilibrium Auto EQ mode or reading the equilibrium EQ parameter stored in the last starting process;
the parameter storage module is used for storing the equalization EQ parameters in the Auto EQ automatic equalization mode into a non-volatile memory (NVRAM);
and the parameter application module is used for applying the equalized EQ parameters acquired by the parameter acquisition module to the current PCIe link.
Optionally, the method further comprises:
the signal quality inspection module is used for detecting the signal quality of the current PCIe link;
and the retraining module is used for retraining the equalizing EQ parameters of the PCIe link when the signal quality of the current PCIe link does not meet a preset standard.
In the technical scheme provided by the invention, the equilibrium EQ parameter is stored in the normal starting process of the PCIe link, and the stored equilibrium EQ parameter can be directly read without training the equilibrium value again in the subsequent starting process. According to the technical scheme, the training process of the balance value is omitted, so that the starting speed of the PCIe link can be improved.
Drawings
FIG. 1 is a flow diagram of a method for fast boot of a PCIe link according to an embodiment;
FIG. 2 is a flow diagram of a PCIe link initiation method of an embodiment;
FIG. 3 is a flowchart illustrating a specific implementation of a PCIe link fast boot method in accordance with another embodiment;
FIG. 4 is a system diagram illustrating an application of the PCIe link fast boot method in accordance with another embodiment;
FIG. 5 is a diagram illustrating an embodiment of a PCIe link fast boot device.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
An embodiment of the present invention provides a PCIe link fast start method, as shown in fig. 1, which is applied to an abnormal start process of a system, and includes:
configuring the equalizing mode of the PCIe link into a mode of skipping equalizing Skip EQ;
in some embodiments, the equalization manner includes a manner of skipping equalization Skip EQ and an automatic equalization Auto EQ, the configuration manner in this step is a manner of configuring the equalization manner to Skip equalization Skip EQ, and the manner of skipping equalization Skip EQ refers to performing only the first stage of equalization, that is, applying the equalization parameter stored at the last start as the current equalization parameter to the current PCIe link.
Reading the equilibrium EQ parameters stored in the last starting;
in some embodiments, the equalized EQ parameter stored at the last startup refers to an equalized EQ parameter that is finally applied to the PCIe link at the last startup in the current hardware environment, and since the parameter stored at the last startup is generally an equalized EQ parameter obtained by automatically equalizing the Auto EQ at the last time or an equalized EQ parameter obtained by rebalancing when the signal quality does not meet the requirement, it can be generally considered that the equalized EQ parameter stored at the last startup is a better equalized EQ parameter in the current hardware environment, and a better signal quality can be obtained, so that the equalized EQ parameter stored at the last startup can be directly read without changing the environment configuration.
And applying the balanced EQ parameters saved in the last starting process to the current PCIe link.
In some embodiments, as can be seen from the description in the previous step, the equalized EQ parameters saved at the last startup are generally considered to be better equalized EQ parameters in the current hardware environment, so that better signal quality can be obtained.
In the technical scheme provided by the embodiment of the invention, the equilibrium EQ parameter is stored in the normal starting process of the PCIe link, and the stored equilibrium EQ parameter can be directly read without training the equilibrium value again in the subsequent starting process. The starting speed of the PCIe link can be improved because the process of training the balance value is omitted.
As an alternative embodiment, continuing with fig. 1, applying the equalized EQ parameters saved at the last boot to the current PCIe link further includes:
the signal quality check is performed on the current PCIe link,
in some embodiments, after applying the equalization EQ parameter saved at the last startup, it is not determined whether the current signal quality meets the predetermined standard, so that signal quality detection needs to be performed on the current PCIe link to obtain the status of the signal quality of the PCIe link, and in general, when the current signal quality does not meet the predetermined standard, re-equalization needs to be performed on the PCIe link to obtain a better equalization EQ parameter.
And when the signal quality of the current PCIe link does not meet the preset standard, retraining the equalized EQ parameters of the PCIe link.
In some embodiments, when the signal quality of the current PCIe link does not meet the predetermined standard, the PCIe link is re-equalized to obtain better equalized EQ parameters and ensure the signal quality of the PCIe link.
As an optional implementation, after the retraining the equalized EQ parameters of the PCIe link, the method further includes: the equalized EQ parameters after retraining are saved to non-volatile memory NVRAM. . And when the next starting is carried out, the equalized EQ parameters obtained by the retraining can be selected and read.
As an alternative embodiment, the abnormal starting process includes: and a starting process that the hardware environment is not changed when the hardware is started for the time relative to the hardware environment when the hardware is started for the last time. In some embodiments, when the hardware environment changes, the equalized EQ parameters generally need to be retrained, and when the hardware environment does not change, the equalized EQ parameters saved at the last startup can be applied to the link.
An embodiment of the present invention provides a PCIe link starting method, as shown in fig. 2, which is applied to a normal starting process of a system, and includes:
configure the PCIe link as a way to Auto equalize the Auto EQ;
in some embodiments, the equalization manner includes a Skip equalization Skip EQ manner and an Auto equalization Auto EQ manner, and the Auto equalization Auto EQ manner is a process of automatically training a PCIe link to obtain better equalization EQ parameters.
Carrying out balance training on the PCIe link according to an automatic balance Auto EQ mode;
in some embodiments, the PCIe link is equalization trained in an Auto-equalization EQ manner, resulting in better equalized EQ parameters. The reason is that the normal starting process is usually the starting process when the hardware environment changes, and when the hardware environment changes, the optimal equilibrium EQ parameters can be obtained by performing equilibrium training on the PCIe link in an automatic equilibrium Auto EQ manner. The equalizing EQ parameter can be applied to the starting of the PCIe link, and can also be applied to the next starting process under the current hardware environment.
And applying the equalization EQ parameters obtained by equalization training to the current PCIe link, and storing the current equalization EQ parameters into a non-volatile memory NVRAM.
In some embodiments, because the equalized EQ parameter obtained by the current startup is a better equalized EQ parameter in the current hardware environment, when the hardware environment is not changed, the equalized EQ parameter obtained by the current startup can be applied to the next startup process, so that the next startup process skips the Auto EQ Auto equalization process, and the equalized EQ parameter obtained by the current startup is directly applied to improve the startup speed without changing the environment configuration.
In the technical scheme provided by the embodiment of the invention, the equilibrium EQ parameter is stored in the normal starting process of the system, and the stored equilibrium EQ parameter can be directly read from the NVRAM without training the equilibrium value again in the subsequent starting process. The starting process of the PCIe link can be improved because the process of training the balance value is omitted.
As an alternative embodiment, continuing with fig. 3, applying the equalized EQ parameters obtained by the equalization training to the current PCIe link further includes:
the signal quality check is performed on the current PCIe link,
in some embodiments, after applying the equalization EQ parameter saved at the last startup, it is not determined whether the current signal quality meets the predetermined standard, so that signal quality detection needs to be performed on the current PCIe link to obtain the status of the signal quality of the PCIe link, and in general, when the current signal quality does not meet the predetermined standard, re-equalization needs to be performed on the PCIe link to obtain a better equalization EQ parameter.
And when the signal quality of the current PCIe link does not meet the preset standard, retraining the equalized EQ parameters of the PCIe link.
In some embodiments, when the signal quality of the current PCIe link does not meet the predetermined standard, the PCIe link is re-equalized to obtain better equalized EQ parameters and ensure the signal quality of the PCIe link.
As an optional implementation, after the retraining the equalized EQ parameters of the PCIe link, the method further includes: the equalized EQ parameters after retraining are saved to non-volatile memory NVRAM. In some embodiments, if the EQ parameters after the retraining are better, the EQ parameters obtained by the retraining may be selected to be read when the environment configuration is not changed at the next startup.
In some embodiments, the normal start-up procedure includes: and a starting process that the hardware environment is changed relative to the hardware environment when the hardware environment is started last time. In some embodiments, when the hardware environment changes, the EQ parameters in other hardware environments cannot be applied to the PCIe link in the current hardware environment, and therefore, when the hardware environment changes, the EQ parameters usually need to be retrained.
In the technical scheme provided by the embodiment of the invention, the EQ equalization parameter is stored in the normal starting process of the system, and in the subsequent starting process, the stored EQ equalization parameter can be directly read from the NVRAM without training the equalization value again. The time consumed by the process of the balance training is saved, so that the starting speed of the PCIe link can be improved.
As shown in fig. 3, a specific implementation of the PCIe link initiation method is provided, which may be implemented on the system shown in fig. 4:
step 1, powering on a tester.
And 2, checking whether the BIOS is normally started or not through software in the BIOS.
Step 3, determining the training mode according to whether the starting is normal or not:
1) and when the system is normally started, executing an automatic balancing process, waiting for the completion of link configuration, storing the finally obtained training parameters into a nonvolatile memory unit NVRAM of the BIOS, and executing the step 6.
2) And when the system is abnormally started, the software confirms the current starting state through the state bit and executes the step 4.
And step 4, reading the parameter value of the last training in the non-volatile memory unit NVRAM, and taking the parameter value as the parameter value of the link training.
Step 5, the software sets the equalization execution mode and configures Skip equalization Skip EQ, namely Skip GEN3 equalization and GEN4 equalization. However, skipping equalization is not so-called no link adjustment, but rather an intermediate process of skipping adjustment, and only the first stage of equalization is performed, where the optimal value obtained from the previous link training is applied to the link.
Step 6, checking whether the signal quality after the link training meets the protocol standard, wherein the signal quality can be judged by obtaining Fom values.
And 7, if the current signal quality does not meet the standard, executing one-time rebalancing to perform link retraining, and storing the trained parameter values (including a balance EQ parameter, a configuration parameter of a physical interface and the like) into a non-volatile memory unit NVRAM of the BIOS.
And 8, waiting for the completion of the link configuration.
Step 9, the signal quality is checked again.
And step 10, finishing the starting.
As shown in fig. 5, an embodiment of the present invention provides a PCIe link fast boot apparatus, including:
the equalizing mode selection module is used for configuring the PCIe link into a mode of skipping equalizing Skip EQ or a mode of automatically equalizing Auto EQ;
in some embodiments, the equalization manner includes a manner of skipping equalization Skip EQ and an automatic equalization Auto EQ, the configuration manner in this step is a manner of configuring the equalization manner to Skip equalization Skip EQ, and the manner of skipping equalization Skip EQ refers to performing only the first stage of equalization, that is, applying the equalization parameter stored at the last start as the current equalization parameter to the current PCIe link. The Auto-equalization EQ mode is to automatically train the PCIe link to obtain better equalized EQ parameters.
The parameter acquisition module is used for determining the equilibrium EQ parameter of the PCIe link in an automatic equilibrium Auto EQ mode or reading the equilibrium EQ parameter stored in the last starting process;
in some embodiments, during a normal start-up process, a PCIe link is balanced and trained in an Auto-balanced Auto EQ manner, so that better balanced EQ parameters are obtained. This is because the normal starting process is usually the starting process when the hardware environment changes, and when the hardware environment changes, the optimal equalization EQ parameter can be obtained by performing equalization training on the PCIe link in an automatic equalization Auto EQ manner. The equalizing EQ parameter can be applied to the starting of the PCIe link, and can also be applied to the next starting process under the current hardware environment. In some embodiments, when the starting process is an abnormal starting process, the equalized EQ parameter stored at the last starting time refers to an equalized EQ parameter that is finally applied to the PCIe link at the last starting time in the current hardware environment, and since the parameter stored at the last starting time is generally an equalized EQ parameter obtained by automatically equalizing the EQ parameter at the last time or an equalized EQ parameter obtained by rebalancing the equalized parameter when the signal quality does not meet the requirement, it can be generally considered that the equalized EQ parameter stored at the last starting time is a better equalized EQ parameter in the current hardware environment, and a better signal quality can be obtained, and thus, the equalized EQ parameter stored at the last starting time can be directly read.
The parameter storage module is used for storing the equalization EQ parameters of the Auto equalization EQ mode into a non-volatile memory (NVRAM);
in some embodiments, because the equalized EQ parameter obtained in the normal starting process is a better equalized EQ parameter in the current hardware environment, when the hardware environment is not changed, the equalized EQ parameter obtained in the current starting process can be applied to the next starting process, so that the next starting process skips the process of automatically equalizing Auto EQ, the equalized EQ parameter in the current starting process is directly applied, and the starting speed is increased.
And the parameter application module is used for applying the equalized EQ parameters acquired by the parameter acquisition module to the current PCIe link.
In some embodiments, when the boot process is an abnormal boot process, the equalized EQ parameter saved at the last boot is generally considered to be a better equalized EQ parameter in the current hardware environment, so that a better signal quality can be obtained. When the starting process is a normal starting process, the equalized EQ parameter obtained in the automatic equalization Auto EQ mode in the starting process is the equalized EQ parameter which is better in the current hardware environment, so that when the hardware environment is not changed, the equalized EQ parameter obtained in the starting process can be applied to the next starting process, the automatic equalization Auto EQ process is skipped in the next starting process, the equalized EQ parameter which is started at the time is directly applied, and the starting speed is improved.
In the technical scheme provided by the embodiment of the invention, the equilibrium EQ parameter is stored in the normal starting process of the PCIe link, and the stored equilibrium EQ parameter can be directly read without training the equilibrium value again in the subsequent starting process. The starting speed of the PCIe link can be improved because the process of training the balance value is omitted.
As an optional implementation, the method further includes:
the signal quality inspection module is used for detecting the signal quality of the current PCIe link;
in some embodiments, after the equalization parameters are applied, in order to determine whether the current equalization parameters meet the requirements, signal quality detection needs to be performed on the current PCIe link, so as to obtain the condition of the signal quality of the PCIe link.
And the retraining module is used for retraining the equalizing EQ parameters of the PCIe link when the signal quality of the current PCIe link does not meet a preset standard.
In some embodiments, in order to obtain better equalized EQ parameters and ensure the signal quality of the PCIe link when the signal quality of the current PCIe link does not meet the predetermined standard, the PCIe link is re-equalized to obtain equalized EQ parameters that can make the signal quality meet the requirement.
It will be understood by those skilled in the art that all or part of the processes of the embodiments of the methods described above may be implemented by a computer program, which may be stored in a computer-readable storage medium, and when executed, may 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.
The above description is only for the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A PCIe link quick starting method is applied to the abnormal starting process of a system and comprises the following steps:
configuring the equalizing mode of the PCIe link into a mode of skipping equalizing Skip EQ;
reading the equilibrium EQ parameters stored in the last starting;
and applying the balanced EQ parameters saved in the last starting process to the current PCIe link.
2. The PCIe link fast boot method of claim 1, wherein applying the stored equalized EQ parameters upon last boot to the current PCIe link further comprises:
the signal quality check is performed on the current PCIe link,
and when the signal quality of the current PCIe link does not meet the preset standard, retraining the equalized EQ parameters of the PCIe link.
3. The PCIe link fast boot method of claim 2, further comprising, after retraining the equalized EQ parameters for the PCIe link:
the equalized EQ parameters after retraining are saved to non-volatile memory NVRAM.
4. The PCIe link fast boot method of claim 1, wherein the abnormal boot process comprises: and a starting process that the hardware environment is not changed when the hardware is started for the time relative to the hardware environment when the hardware is started for the last time.
5. A PCIe link starting method is applied to the normal starting process of a system and comprises the following steps:
configure the PCIe link as a way to Auto equalize the Auto EQ;
carrying out balance training on the PCIe link according to an automatic balance Auto EQ mode;
and applying the equalization EQ parameters obtained by equalization training to the current PCIe link, and storing the current equalization EQ parameters into a non-volatile memory NVRAM.
6. The PCIe link startup method of claim 5, wherein applying the equalized EQ parameters obtained from the equalization training to the current PCIe link further comprises:
the signal quality check is performed on the current PCIe link,
and when the signal quality of the current PCIe link does not meet the preset standard, retraining the equalized EQ parameters of the PCIe link.
7. The PCIe link startup method of claim 6, wherein after retraining the equalized EQ parameters for the PCIe link, further comprising:
the equalized EQ parameters after retraining are saved to non-volatile memory NVRAM.
8. The PCIe link startup method of claim 5, wherein the normal startup procedure comprises: and a starting process that the hardware environment is changed relative to the hardware environment when the hardware environment is started last time.
9. A PCIe link fast boot apparatus, comprising:
the equalizing mode selection module is used for configuring the PCIe link into a mode of skipping equalizing Skip EQ or a mode of automatically equalizing Auto EQ;
the parameter acquisition module is used for determining the equilibrium EQ parameter of the PCIe link in an automatic equilibrium Auto EQ mode or reading the equilibrium EQ parameter stored in the last starting process;
the parameter storage module is used for storing the equalization EQ parameters in the Auto EQ automatic equalization mode into a non-volatile memory (NVRAM);
and the parameter application module is used for applying the equalized EQ parameters acquired by the parameter acquisition module to the current PCIe link.
10. The PCIe link fast start apparatus of claim 9, further comprising:
the signal quality inspection module is used for detecting the signal quality of the current PCIe link;
and the retraining module is used for retraining the equalizing EQ parameters of the PCIe link when the signal quality of the current PCIe link does not meet a preset standard.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109376103A (en) * | 2018-06-19 | 2019-02-22 | 华为技术有限公司 | Method, chip and the communication system of fast uniform |
| CN110620618A (en) * | 2018-06-19 | 2019-12-27 | 中兴通讯股份有限公司 | Link equalization parameter training control circuit and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109376103A (en) * | 2018-06-19 | 2019-02-22 | 华为技术有限公司 | Method, chip and the communication system of fast uniform |
| CN110620618A (en) * | 2018-06-19 | 2019-12-27 | 中兴通讯股份有限公司 | Link equalization parameter training control circuit and method |
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