WO2020014836A1 - 获取光模块链路协商信息的方法、设备和系统 - Google Patents

获取光模块链路协商信息的方法、设备和系统 Download PDF

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Publication number
WO2020014836A1
WO2020014836A1 PCT/CN2018/095831 CN2018095831W WO2020014836A1 WO 2020014836 A1 WO2020014836 A1 WO 2020014836A1 CN 2018095831 W CN2018095831 W CN 2018095831W WO 2020014836 A1 WO2020014836 A1 WO 2020014836A1
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Prior art keywords
optical module
information
partition
link negotiation
readable
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English (en)
French (fr)
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史品
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Priority to EP18926409.6A priority Critical patent/EP3805911A4/en
Priority to CN201880003844.8A priority patent/CN110998509B/zh
Priority to PCT/CN2018/095831 priority patent/WO2020014836A1/zh
Publication of WO2020014836A1 publication Critical patent/WO2020014836A1/zh
Priority to US17/150,635 priority patent/US11256635B2/en
Anticipated expiration legal-status Critical
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    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
    • G06F13/14—Handling requests for interconnection or transfer
    • G06F13/16—Handling requests for interconnection or transfer for access to memory bus
    • G06F13/1668—Details of memory controller
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F11/00—Error detection; Error correction; Monitoring
    • G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
    • G06F11/14—Error detection or correction of the data by redundancy in operations
    • G06F11/1402—Saving, restoring, recovering or retrying
    • G06F11/1405—Saving, restoring, recovering or retrying at machine instruction level
    • G06F11/141—Saving, restoring, recovering or retrying at machine instruction level for bus or memory accesses
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • 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
    • G06F13/42—Bus transfer protocol, e.g. handshake; Synchronisation
    • G06F13/4282—Bus transfer protocol, e.g. handshake; Synchronisation on a serial bus, e.g. I2C bus, SPI bus
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
    • G06F3/0601—Interfaces specially adapted for storage systems
    • G06F3/0602—Interfaces specially adapted for storage systems specifically adapted to achieve a particular effect
    • G06F3/061—Improving I/O performance
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
    • G06F3/0601—Interfaces specially adapted for storage systems
    • G06F3/0628—Interfaces specially adapted for storage systems making use of a particular technique
    • G06F3/0655—Vertical data movement, i.e. input-output transfer; data movement between one or more hosts and one or more storage devices
    • G06F3/0658—Controller construction arrangements
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
    • G06F3/0601—Interfaces specially adapted for storage systems
    • G06F3/0668—Interfaces specially adapted for storage systems adopting a particular infrastructure
    • G06F3/0671—In-line storage system
    • G06F3/0683—Plurality of storage devices
    • G06F3/0689—Disk arrays, e.g. RAID, JBOD
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; 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
    • G06F2213/0016—Inter-integrated circuit (I2C)
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; 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
    • G06F2213/0028—Serial attached SCSI [SAS]

Definitions

  • the present invention relates to the field of Information Technology (IT), and in particular, to a method, a device, and a system for acquiring link negotiation information of an optical module.
  • IT Information Technology
  • a small computer system interface is an independent processor standard for a system-level interface between a computer and an intelligent device (including but not limited to hard disks, floppy drives, optical drives, printers, scanners, etc.).
  • serially connected SCSI Serial Attached SCSI, SAS
  • SAS interfaces are mainly used in servers, mass storage systems, disk arrays, and high-speed Internet networks.
  • MINI SAS is a new generation SAS interface, which not only has superior signal transmission performance, but also meets the requirements for miniaturization of boards.
  • MINI SAS optical module is the identity of SAS cable and SAS optical cable. It is widely used in enterprise storage and cloud storage.
  • the present application provides a method, a device, and a system for obtaining link negotiation information of an optical module, so as to improve reliability of obtaining link negotiation information of an optical module.
  • this application provides a method for obtaining link negotiation information of an optical module, including:
  • Re-acquire the information of the readable partition of the optical module and obtain the information corresponding to the readable partition of the optical module, when the corresponding partition is the same as the partition in the optical module that stores the link negotiation information, Link negotiation information of the optical module.
  • the information of the readable partition is first obtained, and the partition corresponding to the obtained information of the readable partition is different from the partition that stores the link negotiation information in the optical module, and the acquired optical module chain is recorded.
  • the information of the readable area of the optical module is modified to the information of the partition in the optical module that stores the link negotiation information to obtain the link of the optical module.
  • Negotiation information it is possible to avoid modifying the information of the readable partition of the optical module first to the information of the partition that stores the link negotiation information in the optical module. Failure to obtain the power due to power failure or abnormal link reset. Improved the reliability of reading the link negotiation information of the optical module.
  • the partition corresponding to the information of the readable partition of the optical module when the partition corresponding to the information of the readable partition of the optical module is the same as the partition that stores the link negotiation information in the optical module, it indicates that the storage chain in the optical module is gated.
  • the partition of the channel negotiation information that is, the information in the partition that stores the link negotiation information in the optical module can be read. In this case, the success rate of obtaining the link negotiation information of the optical module is high, and the reliability of obtaining the link negotiation information of the optical module is also high.
  • the information of the readable partition of the optical module is modified to the information of the partition that stores the link negotiation information in the optical module.
  • the value corresponding to the field of the partition of the optical module is modified to the value corresponding to the information of the partition that stores the link negotiation information in the optical module.
  • the partition of the optical module that has been gated refers to a partition that can read its stored content.
  • the method before the re-obtaining the information of the readable area of the optical module, the method further includes:
  • the method further includes:
  • the obtained partition information corresponding to the readable information of the optical module is different from the partition in which the link negotiation information is stored in the optical module, and the recorded number of times of obtaining the optical module link negotiation information does not reach the pre-
  • the information of the readable partition of the optical module is modified again to the information of the partition in the optical module that stores the link negotiation information; the information of the readable partition of the optical module is obtained again, and Increase the recorded times of obtaining the optical module link negotiation information again by 1.
  • the link negotiation information of the optical module is used for link negotiation in the drive management process of the optical module;
  • the link negotiation information of the optical module includes:
  • Connector type optoelectronic parameters, multimode or singlemode, voltage and transmit offset.
  • the link negotiation information of the optical module further includes operating temperature or manufacturer information.
  • the method is implemented by a Microcontroller Unit (MCU).
  • MCU Microcontroller Unit
  • the MCU and the optical module are connected through an I2C bus (Inter Integrated Circuit bus, I2C bus).
  • I2C bus Inter Integrated Circuit bus, I2C bus
  • the MCU is an MCU in a control device of the storage system, or the MCU is an MCU in a storage device of the storage system.
  • the optical module is a MINI SAS optical module.
  • the partition storing the link negotiation information is the page0 partition in the MINI SAS optical module.
  • the information of the partitions readable by the optical module is information of the partitions selected by the optical module.
  • the MCU can read the information in the page0 partition through the connection with the optical module.
  • the preset threshold is 3.
  • the preset preset threshold of the number of times that the link negotiation information of the optical module is acquired may be a first preset threshold.
  • the foregoing number of times of obtaining the recorded link negotiation information of the optical module is increased by one, which is achieved by adding one to the counter in the MCU.
  • it may be implemented by adding 1 to the first counter.
  • the method further includes: obtaining information of a partition readable by the optical module by acquiring content corresponding to a control byte in a page select byte of the optical module, and the control byte records The information of the gated partition.
  • the content corresponding to the control byte in the page select byte of the optical module is 0, indicating that the gated partition is the page0 partition.
  • control byte in the page select byte is the 127th byte in the page select byte.
  • the method further includes:
  • the link negotiation information of the optical module is terminated.
  • the obtained partition information corresponding to the readable information of the optical module is different from the partition in which the link negotiation information is stored in the optical module, and the recorded number of times that the optical module link negotiation information is obtained reaches the preset
  • the link negotiation information of the optical module is terminated.
  • the termination of acquiring the link negotiation information of the optical module may be implemented by exiting the drive management process of the optical module. In this way, for the optical module that does not support the write operation of the partition gate field, for example, the optical module that does not support the write of page select byte, an effective processing mechanism is also provided, which improves the compatibility of reading the link negotiation information of the optical module.
  • the method further includes:
  • the recorded number of times of obtaining the optical module link negotiation information does not reach a preset threshold
  • re-acquire the information of the optical module readable partition and record the The number of times that the optical module link negotiation information is obtained is incremented by one.
  • the recorded times of obtaining the optical module link negotiation information is increased by 1. That is, when obtaining the information of the optical module readable partition fails, only the first counter can be used to record the number of times that the optical module link negotiation information is obtained.
  • the method further includes:
  • the number of failures to obtain the readable partition information of the optical module may be counted by another counter.
  • the failure information of the acquisition of the readable partition information of the optical module is sent.
  • a second counter in the MCU may be used to count the number of times that the acquisition of the partition information that the optical module can read fails.
  • the second counter is incremented by one. That is, the counter used to record the number of failed times to obtain the readable partition information of the optical module may be different from the counter used to record the number of times that the optical module link negotiation information is obtained.
  • control chip including a control unit and an acquisition unit
  • the acquiring unit is configured to acquire information of a readable partition of the optical module
  • the control unit is configured to obtain, in the optical unit, the partition corresponding to the information of the optical module readable partition obtained by the acquiring unit, which is different from the optical module that stores the link negotiation information, and records the acquired optical module.
  • the number of times of the link negotiation information does not reach the preset threshold, modifying the information of the partition that can be read by the optical module to the information of the partition that stores the link negotiation information in the optical module;
  • the obtaining unit is further configured to re-obtain information about the readable area of the optical module, and to obtain a link corresponding to the obtained information of the readable area of the optical module and the storage link in the optical module.
  • the link negotiation information of the optical module is obtained.
  • the obtaining unit obtains information of the readable area of the optical module; the control unit obtains the information of the readable area of the optical module obtained by the obtaining unit, and the area corresponding to the information of the readable area of the optical module is the same as that in the optical module.
  • the partitions that store the link negotiation information are different, and the recorded times of obtaining the link negotiation information of the optical module do not reach a preset threshold, the information of the partition that can be read by the optical module is modified to the storage link in the optical module Negotiate the partition information of the information to obtain the link negotiation information of the optical module. In this way, the situation in which the control chip fails to read the link negotiation information of the optical module due to power supply flashing and abnormal link reset can be avoided, and the reliability of reading the link negotiation information of the optical module is improved.
  • control unit modifies the information of the optical module's readable partition into the information of the optical module's partition that stores the link negotiation information, and the control unit can use the optical module in the optical module.
  • the method is implemented by recording the value corresponding to the field of the partition of the optical module that has been gated, and modifying the value corresponding to the information of the partition that stores the link negotiation information in the optical module.
  • the partition of the optical module that has been gated refers to a partition that can read its stored content.
  • control chip is a control chip in a control device of a storage system, or the control chip is a control chip in a storage device of a storage system.
  • the optical module is a MINI SAS optical module.
  • the partition storing the link negotiation information is the page0 partition in the MINI SAS optical module.
  • the information of the partitions readable by the optical module is information of the partitions selected by the optical module.
  • the control chip is an MCU and the optical module is a MINI SAS optical module
  • the MCU can read the information in the page0 partition through the connection with the optical module.
  • the preset threshold is 3.
  • the preset preset threshold of the number of times that the link negotiation information of the optical module is acquired may be a first preset threshold.
  • the link negotiation information of the optical module is used for link negotiation in the drive management process of the optical module;
  • the link negotiation information of the optical module includes:
  • Connector type optoelectronic parameters, multimode or singlemode, voltage and transmit offset.
  • the link negotiation information of the optical module further includes operating temperature or manufacturer information.
  • control chip further includes a counting unit
  • the counting unit is configured to add 1 to the number of times of acquiring the optical module information after modifying the information of the readable partition of the optical module to the information of the partition storing link negotiation information in the optical module.
  • the counting unit is further configured to: when obtaining the information of the optical module readable partition fails and the recorded number of times of obtaining the optical module link negotiation information does not reach a preset threshold, The number of times the link negotiation information of the optical module is obtained is incremented by one.
  • the counting unit may be a counter in the control chip.
  • the obtaining unit is further configured to: obtain, in the optical module, the partition corresponding to the information of the optical module readable partition obtained by the obtaining unit, and store the link negotiation information in the optical module.
  • the number of divisions is different, and the number of times of obtaining the link negotiation information of the optical module reaches a preset threshold, the obtaining of the link negotiation information of the optical module is terminated.
  • the obtaining unit in the control chip terminates obtaining the link negotiation information of the optical module.
  • the acquiring unit may terminate acquiring the link negotiation information of the optical module in a manner that the control chip exits the drive management process of the optical module. In this way, for an optical module that does not support the write operation of the partition gate field, for example, an optical module that does not support page select byte write, the control chip can also effectively handle it, improving the compatibility of reading the optical module link negotiation information.
  • the obtaining unit is further configured to, when obtaining the information of the readable area of the optical module fails, obtain the information of the readable area of the optical module again.
  • the number of times of failing to obtain information of the readable partition of the optical module may be counted by another counting unit in the control chip.
  • the control chip sends a message that the acquisition of the information of the optical module-readable partition fails.
  • the another counting unit may be another counter in the control chip.
  • the obtaining unit obtains information of a partition readable by the optical module by acquiring the content corresponding to the control byte in the page select byte of the optical module.
  • the control byte records Gated partition information. For example, the content of the control byte in the page select byte of the optical module is 0, indicating that the gated partition is the page0 partition.
  • control byte in the page select byte is the 127th byte in the page select byte.
  • the obtaining unit is further configured to: when obtaining the information of the optical module readable partition fails and the recorded number of times of obtaining the optical module link negotiation information does not reach a preset threshold, re-describe the Obtains information about the partitions that the optical module can read.
  • the present application further provides a control device, including a central processing unit, a main memory, and the control chip described in the second aspect.
  • the present application further provides a storage device, including a storage medium and the control chip described in the second aspect.
  • the present application further provides a storage system, where the storage system includes a control device and a storage device,
  • the control device includes a central processing unit, a main memory, and the control chip described in the second aspect;
  • the storage device includes a storage medium and the control chip according to the second aspect.
  • the present application provides a computer storage medium for storing computer software instructions used for a control chip, which includes a program designed to execute the first aspect described above.
  • the present application provides a computer program that, when a control chip in a computer device or a server runs the computer program, the control chip performs the functions of the control chip described in the second aspect.
  • FIG. 1A is a schematic structural diagram of a storage system according to an embodiment of the present application.
  • FIG. 1B is another schematic structural diagram of a storage system according to an embodiment of the present application.
  • FIG. 2 is a schematic structural diagram of an MCU connected to a MINI SAS optical module through an I2C bus according to an embodiment of the present application;
  • FIG. 3 is a schematic flowchart of an MCU obtaining optical module information according to an embodiment of the present application
  • 4A is a schematic flowchart of a method for acquiring link negotiation information of an optical module according to an embodiment of the present application
  • 4B is a schematic flowchart of a specific method for obtaining link negotiation information of an optical module according to an embodiment of the present application
  • FIG. 5 is a schematic structural diagram of a control chip 500 according to an embodiment of the present application.
  • FIG. 6 is a schematic structural diagram of another control chip 500 according to an embodiment of the present application.
  • FIG. 7 is a schematic structural diagram of a control device 700 according to an embodiment of the present application.
  • FIG. 8 is a schematic structural diagram of a storage device 800 according to an embodiment of the present application.
  • FIG. 9 is a schematic structural diagram of a storage system 900 according to an embodiment of the present application.
  • first and second in the embodiments of the present application are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as “first” and “second” may explicitly or implicitly include one or more of the features.
  • FIG. 1A is a schematic structural diagram of a storage system, including a control device 100 and a storage device 200.
  • the control device 100 mainly includes a central processing unit (CPU), a main memory (such as a random access memory RAM, etc.), and hardware resources such as an MCU.
  • the storage device 200 is configured to store data, and may include, but is not limited to, a storage medium such as a hard disk drive (HDD), a solid-state hard disk (SSD), and the like.
  • the storage device 200 includes a hard disk as an example for description.
  • the control device 100 is connected to the optical module 102, the storage device 200 is connected to the optical module 202, and the optical module 102 and the optical module 202 are connected through a SAS cable to implement communication between the control device 100 and the storage device 200.
  • the MCU 101 in the control device 100 can detect the access of the optical module and start a management process for driving to establish a connection with the optical module 102.
  • the MCU is a chip with a management control function, and performs different combination control for different application occasions.
  • the MCU can reduce the frequency and specifications of the CPU appropriately, and change the main memory (memory), timer (timer), counter, universal serial bus (Universal Serial Bus, USB), analog / digit (analog / digit (A / D) conversion, universal asynchronous receiver / transmitter (UART), programmable logic controller (PLC), direct memory access (DMA) and other peripheral interfaces
  • main memory memory
  • timer timer
  • counter universal serial bus
  • USB Universal Serial Bus
  • analog / digit analog / digit
  • a / D analog / digit
  • UART universal asynchronous receiver / transmitter
  • PLC programmable logic controller
  • DMA direct memory access
  • LCD light-coupled device
  • the MCU 101 and the optical module 102 can communicate through the I2C bus, that is, the MCU 101 can obtain the internal information of the optical module 102 through the I2C bus.
  • the I2C bus structure is clear, including a data line and a clock line, and the implementation principle is simple, it is a common bus for obtaining information about optical modules.
  • the embodiment of the present application does not limit the form of the communication bus between the MCU 101 and the optical module 102, and other buses capable of realizing the internal information of the optical module 102 obtained by the MCU 101 can also be implemented by the technical solution provided by the embodiment of the present application.
  • the embodiment of the present application uses the I2C bus as an example for description.
  • the MCU 201 After the MCU 201 detects that the optical module 202 is connected to the storage device 200, the MCU 201 starts a driver management process through the I2C bus, and establishes a connection with the optical module 202.
  • FIG. 1A is only described by using a control device and a storage device as examples. It can be understood that, in a specific implementation, the control device 100 may also be connected to multiple storage devices. When the control device is connected to multiple storage devices, the implementation of connecting each control device to the storage device through an optical module is similar to the implementation of the connection between the control device 100 and the storage device 200, and will not be described again.
  • FIG. 1B is a schematic structural diagram of a storage system implementation in another scenario.
  • the storage device 200 is also connected to the storage device 300 through a SAS cable, that is, the storage device 200 is connected to the storage device 300 through an optical module 204, a SAS cable, and an optical module 302.
  • the connection relationship between the MCU 301 and the optical module 302 in the storage device 300 is similar to the connection relationship between the MCU 203 and the optical module 204 in the storage device 200, and will not be described again.
  • the above SAS channel is only an example.
  • the control device and the storage device may also be connected through a Peripheral Component Interconnect Express (PCIe) channel or an Ethernet channel.
  • PCIe Peripheral Component Interconnect Express
  • the embodiment of the present application uses the SAS channel as an example for description, but the technical solution disclosed in the embodiment of the present application is not limited to the implementation of the SAS channel.
  • the implementation of the SAS channel can also be referred to. Way to achieve, no longer repeat them.
  • the stability of the communication between the control device 100 and the storage device 200 and the stability of the communication between the storage device 200 and the storage device 300 determine the performance and stability of the storage system. .
  • the stability of the communication between the control device 100 and the storage device 200 depends on the stability of the communication between the optical module 102 and the optical module 202 through the SAS cable.
  • the stability of the communication between the storage device 200 and the storage device 300 depends on the stability of the communication between the optical module 204 and the optical module 302 through the SAS cable.
  • the MCU obtains the information of the link negotiation in the optical module to perform the link negotiation. If the MCU fails to obtain the link negotiation information of the optical module, it will affect the success of the link negotiation and ultimately affect the stability of the SAS channel.
  • the MCU After the MCU detects the connection of the optical module, it starts the drive management process for the optical module. During the drive management process of the optical module, the MCU obtains the information of the optical module link negotiation. For example, in the drive management of the optical module 102, the MCU 101 will obtain the internal information about the link negotiation of the optical module 102 for link negotiation; the drive management of the optical module 202 by the MCU 201 will obtain the internal information of the optical module 202. Link negotiation related information for link negotiation.
  • the optical module stores a total of four partition information: page0-page3, where the information used for link negotiation is stored in the page0 partition, page1-page3 is mainly the diffusion information part, with application coding , User-defined intervals, and more.
  • the MCU can read / write the configuration page select byte field through the I2C protocol, select the page partition and read the information in the partition.
  • FIG. 2 is a schematic structural diagram of an MCU connected to a MINI SAS optical module through an I2C bus, and internal partition information of the optical module. It can be understood that the MCU can also be connected to the optical module through other buses, as long as the acquisition of the information of the optical module is within the scope disclosed in the embodiments of the present application.
  • the MCU's drive management of MINI SAS optical modules includes, but is not limited to: optical module presence check, optical module information acquisition, out-of-band parameter configuration based on the acquired information, and SAS link rate negotiation enabled. among them:
  • the presence check of the optical module mainly monitors whether the optical module is connected to the system.
  • the optical module information acquisition is mainly to obtain the information of the optical module link negotiation, in general, it is the information of the page0 partition.
  • the optical module link negotiation information includes, but is not limited to, the type of connector, whether it is an optical cable or a cable, optical and electrical parameters, multi-mode or single-mode, voltage, and transmission offset.
  • Optical module link negotiation information may also include information such as operating temperature or manufacturer.
  • the configuration of out-of-band parameters is mainly based on the obtained internal information of the optical module to perform link parameters such as pre-emphasis, swing, and center parameters.
  • Enabling link negotiation is mainly to enable SAS link rate negotiation.
  • obtaining the optical module link negotiation information is the core part of the entire drive management, which is directly related to the stability of the link.
  • FIG. 3 is a schematic flowchart of an MCU obtaining optical module information based on the scenario shown in FIG. 2. As shown in Figure 3, it includes:
  • Step 100 After the MCU detects that the MINI SAS optical module is connected, first configure the page select byte to 0 and gate the page0 partition;
  • the page0 partition is gated. After the MCU strobes the page0 partition, it can obtain the page0 partition information.
  • Step 102 the MCU reads the information of page0;
  • Step 104 Determine whether the reading of the page0 information is successful. If successful, perform step 106; if not, proceed to 108;
  • Step 106 the reading is successful, and the subsequent processes of driver management such as link negotiation are performed according to the obtained page0 information;
  • Step 108 The reading fails, and the drive management process is exited.
  • the MCU executes the page0 information only once and has no confirmation mechanism, which results in low reliability when obtaining the page0 information.
  • abnormal information may be obtained, or parameters of other partitions may be read. failure.
  • the driver access interface of some optical modules produced by some manufacturers does not follow the SFF-8636 Specification for COMMON MANAGEMENT INTERFACE management protocol and does not support writing page select byte operations.
  • SFF is an abbreviation of Small Form Factor and is mainly used to define some connector standards on the storage system.
  • An embodiment of the present application provides a method for acquiring link negotiation information of an optical module to solve the above-mentioned problem of low reliability when acquiring the information of the optical module.
  • FIG. 4A a schematic flowchart of a method for obtaining link negotiation information of an optical module according to an embodiment of the present application.
  • the method includes:
  • Step 200A acquiring information of the readable partition of the optical module
  • Step 202A When the obtained partition information corresponding to the readable information of the optical module is different from the partition in which the link negotiation information is stored in the optical module, and the recorded number of times of obtaining the optical module link negotiation information is not reached
  • the threshold value is preset, modifying the information of the readable partition of the optical module to the information of the partition in the optical module that stores the link negotiation information
  • Step 204A Re-obtain the information of the readable partition of the optical module, and compare the obtained partition with the information of the readable partition of the optical module with the partition of the optical module that stores the link negotiation information. At the same time, the link negotiation information of the optical module is acquired.
  • the information of the readable partition is obtained first, and the partition corresponding to the obtained information of the readable partition is different from the partition that stores the link negotiation information in the optical module, and records the acquired optical module link.
  • the information of the readable area of the optical module is modified to the information of the partition in the optical module that stores the link negotiation information to obtain the link negotiation of the optical module. information.
  • the above method may be implemented by an MCU, which may be a computer device or a MCU in a server as a control device in a storage system, or a computer device or an MCU in a server as a storage device in a storage system.
  • an MCU which may be a computer device or a MCU in a server as a control device in a storage system, or a computer device or an MCU in a server as a storage device in a storage system.
  • the method further includes: adding 1 to the recorded number of times that the optical module link negotiation information is obtained.
  • the foregoing number of times of obtaining the recorded link negotiation information of the optical module is increased by 1, which may be implemented by adding 1 to the counter in the MCU.
  • the first counter in the MCU may be used to record the number of times that the optical module link negotiation information is obtained.
  • the first counter may be incremented by 1 after the MCU modifies the information of the readable partition of the optical module to the information of the partition storing link negotiation information in the optical module.
  • the preset threshold may be a first preset threshold.
  • the first preset threshold may be 3 times.
  • the method further includes:
  • the information of the readable partition of the optical module is modified again to the information of the partition in the optical module that stores the link negotiation information, and the information of the readable partition of the optical module is obtained again, and Increase the recorded times of obtaining the optical module link negotiation information again by 1.
  • increasing the recorded number of times of obtaining the optical module link negotiation information again by 1 may be implemented by adding 1 to the first counter.
  • the foregoing method may further include:
  • the termination is terminated Obtain the link negotiation information of the optical module.
  • the way to terminate the acquisition of the link negotiation information of the optical module may be to exit the drive management process of the optical module.
  • an effective processing mechanism is also given. This provides a processing method in which the optical module does not support the write operation of the partition gate field, and improves the compatibility of reading the link negotiation information of the optical module.
  • the problem of obtaining the information of the readable partition of the optical module may fail due to a link between the MCU and the optical module.
  • the method may further include: judging whether the recorded number of times that the optical module link negotiation information is obtained reaches the preset threshold; if the preset threshold is not reached, step 200A is re-executed, and The number of times the link negotiation information of the optical module is obtained is incremented by one.
  • the first counter may be incremented by 1 as the recorded number of times of obtaining the link negotiation information of the optical module.
  • a second counter can be set for the failure to obtain the optical module link negotiation information to record the information of the optical module readable partition Times.
  • the second counter is incremented by one.
  • the second preset threshold may be 10.
  • the counting may not be performed, that is, the first counter does not need to be incremented, and the step 200A is directly performed again.
  • the link negotiation information of the optical module is used for link negotiation in the drive management process of the optical module; the link negotiation information of the optical module may include: connector type, photoelectric parameters, multiple Mode or single mode, voltage and transmit offset.
  • the link negotiation information of the optical module may further include operating temperature or manufacturer information.
  • the information of the readable partition of the optical module can be obtained by acquiring the control byte in the page select byte of the optical module.
  • the control byte records information of the gated partition.
  • the MCU can read the gated partition information.
  • the control byte in the page select byte of the optical module may be the 127th byte in the page select byte.
  • the following uses a MINI SAS optical module as an example to describe a method for acquiring link negotiation information of an optical module provided in the embodiment of the present application. As shown in FIG. 4B, the method includes:
  • Step 200B After the MCU detects that the optical module is connected, it acquires a page select byte control byte;
  • the page select byte control byte records the information of the partition that can be read by the optical module.
  • the optical module includes a page select byte field, which can be used to implement the selection of the optical module partition.
  • the page select byte control byte records the readable partition information.
  • the information of the page0 partition can be read; if the value of the page select byte control byte record is 3, the information of the page3 partition can be read.
  • the 127th bit in the page select byte is the page select byte control byte. That is, the MCU can obtain the readable partition information by obtaining the content of the 127th byte in the page select byte.
  • the MCU After the MCU detects that the optical module is connected to the system, it sends an instruction to acquire the page select byte control byte to the optical module through the communication bus (such as the I2C bus).
  • the communication bus such as the I2C bus.
  • the readable partition is the page0 partition. That is, in the case where the readable partition is exactly the page0 partition, the steps of writing the page select byte field can be reduced, which can improve the efficiency of obtaining optical module information.
  • Step 202B The MCU determines whether the acquisition is successful; if it is successful, execute step 206B; if it fails, execute step 204B;
  • the MCU will determine whether the acquisition of the page select byte control byte is successful based on the I2C communication protocol's judgment criterion for successful acquisition.
  • the I2C bus includes a clock line and a data line.
  • the MCU will receive the content transmitted by the optical module through the data line.
  • the received content includes, but is not limited to, check digits, response signals, and data content.
  • the MCU determines whether the acquisition is successful according to the I2C communication protocol.
  • the MCU only needs to determine whether the acquisition is successful, and does not need to judge the acquired content.
  • Step 204B The MCU performs a retry and performs step 200B again.
  • the MCU may fail to obtain the page select byte control byte due to an I2C link failure. In this case, the MCU reacquires the information of the optical module link negotiation, that is, step 200B is performed again.
  • the MCU can add 1 to the number of times the link module obtains the optical module link negotiation information.
  • the count value can be set by means of a counter. The count value defaults to 0.
  • the counter is incremented by 1, and so on.
  • the first counter in the MCU may be incremented by 1 to record the number of times that the optical module link negotiation information is obtained.
  • the MCU may also use a second counter to record the number of times that the optical module link negotiation information fails to be obtained.
  • the second counter reaches a preset second preset threshold value, for example, the second preset threshold value is 10, step 204B is no longer performed, and step 200B is not performed again. That is, the counter used by the MCU to obtain the number of times that the page select byte control byte fails is different from the counter used when counting the page select byte control field in step 214B below. In this way, different execution times can be counted for different situations, and different processing can be performed when the preset thresholds are respectively reached, which can improve the processing accuracy when acquiring the optical module link negotiation information.
  • the MCU may also send the acquisition failure information to the management device in the computer device or server where the MCU is located, such as a baseboard management controller (BMC).
  • BMC baseboard management controller
  • Step 206B The MCU successfully acquires the page select byte control byte, and the MCU determines whether the value of the acquired page select byte control byte is 0. If it is 0, it indicates that the page0 partition has been gated, and the information of the page0 partition can be read, then step 208B; if not, it indicates that the page0 partition has not been gated, and the information of the page0 partition cannot be read, then step 210B is performed. ;
  • Step 208B the MCU reads the information of the page0 partition and executes the subsequent process of reading the page0 partition successfully in the optical module driver management;
  • Step 210B determine whether the recorded number of times of obtaining the optical module information reaches a preset threshold; if the preset threshold is exceeded, execute step 212B; if the preset threshold is not exceeded, execute step 214B;
  • the number of times that the optical module link negotiation information is obtained can be recorded by a counter. For example, it may be determined whether the value recorded by the first counter in step 204B above exceeds a preset threshold. When the value recorded by the first counter reaches the preset threshold, for example, the first preset threshold is reached, step 212B is performed; when the value recorded by the first counter does not reach the preset threshold, for example, the first preset threshold is not reached If yes, go to step 214B.
  • the unsuccessful acquisition of the optical module link negotiation information in different situations is taken as an attempt to acquire.
  • the preset threshold value is reached and the optical module link negotiation information is not obtained successfully, it is no longer necessary. Trying to obtain and exit the drive management process can improve the efficiency of obtaining optical module link negotiation information.
  • the number of recorded acquisitions of the optical module information reaches a preset threshold, for example, when the first preset threshold value indicates that there is a serious fault, the acquisition of the optical module information fails. In this case, the optical module information is no longer obtained, and the optical module driver management process is exited.
  • the first preset threshold is 3. In specific implementation, it may also be flexibly set according to specific service requirements.
  • the first preset threshold may also be 2 or 4 times, which is not specifically limited in the embodiment of the present application.
  • Step 212B failed to obtain the information of the optical module, and exit the drive management process
  • the MCU determines that it fails to obtain the page0 information, exits the driver management process, and ends the driver management process.
  • Step 214B The MCU writes the page select byte control field to 0 to gate the page0 partition, and adds 1 to the number of times that the recorded acquisition of optical module information is added;
  • the MCU may send an instruction to the optical module through the I2C bus, and the instruction is used to instruct the optical module to write a page select byte control field to 0 to gate the page0 partition. After gating the page0 partition, the MCU can read the information in the page0 partition.
  • Adding 1 to the recorded number of times of obtaining the optical module information can be implemented by adding 1 to the first counter that counts the number of times in steps 204B and 210B. In this way, the efficiency when acquiring the link negotiation information of the optical module can be improved
  • the MCU after detecting that the optical module is connected, the MCU first obtains the content of the page select byte control byte. If the acquisition is successful, determine whether the gate is the page0 partition. When the gate is not the page0 partition, write the value corresponding to the page0 partition to the page select byte control byte, and re-acquire the content of the page select byte control byte and try to obtain the page0 partition information again. In this way, it is possible to avoid a situation in which the MCU fails to read the page0 information due to a power supply flash interruption, an I2C master abnormal reset, and the like, and improves the reliability of reading the page0 partition information.
  • step 200B regardless of whether the MCU writes the page select byte control byte 0 successfully or not, it returns to execute step 200B.
  • the information of the optical module that can be obtained after step 200B is re-executed to perform the subsequent drive management process.
  • the drive management process of the optical module is ended. That is, when the optical modules are not compatible, there is also an effective processing mechanism to handle them, which improves the compatibility when acquiring the link negotiation information of the optical modules.
  • the foregoing description uses the MINI SAS optical module as an example.
  • optical modules such as a network card's optical module, a Fiber Channel (FC) optical module, and a PCIE optical module
  • FC Fiber Channel
  • PCIE optical module since the driving mechanism or method is similar, the solution provided in the embodiment of the present application can also be used.
  • FIG. 5 is a schematic structural diagram of a control chip 500 according to an embodiment of the present application. As shown in FIG. 5, the control chip 500 includes a control unit 501 and an acquisition unit 502.
  • the acquiring unit 501 is configured to acquire information of a readable partition of an optical module
  • the control unit 502 is configured to obtain a partition corresponding to the information of the optical module readable partition obtained by the obtaining unit, which is different from a partition storing link negotiation information in the optical module, and records the acquired light.
  • a partition corresponding to the information of the optical module readable partition obtained by the obtaining unit which is different from a partition storing link negotiation information in the optical module, and records the acquired light.
  • the obtaining unit 502 is further configured to re-acquire the information of the optical module readable partitions, and obtain the information corresponding to the information of the optical module readable partitions in the partition corresponding to the storage chain in the optical module.
  • the link negotiation information of the optical module is obtained.
  • the link negotiation information of the optical module is used for link negotiation in the drive management process of the optical module
  • the link negotiation information of the optical module includes: a connector type, a photoelectric parameter, a multi-mode or a single-mode, a voltage, and a transmission offset.
  • the link negotiation information of the optical module further includes operating temperature or manufacturer information.
  • control chip 500 further includes a counting unit 503;
  • the counting unit 503 is configured to add 1 to the number of times of acquiring the information of the optical module after modifying the information of the readable partition of the optical module to the information of the partition storing the link negotiation information in the optical module.
  • the counting unit 503 is further configured to: when obtaining the optical module readable partition information fails and the recorded number of times of acquiring the optical module link negotiation information does not reach a preset threshold, the recorded optical module link is acquired Increase the number of times of negotiation information by 1.
  • the acquiring unit 503 is further configured to re-acquire the partition information that can be read by the optical module when acquiring the partition information that can be read by the optical module fails.
  • another counting unit in the control chip 500 such as a second counting unit (not shown in the figure) can be used to count the number of times that the optical module can read the partition information failures.
  • the control chip 500 may exit the drive management process of the optical module and send to obtain the readable data of the optical module.
  • Information about partition information failure For example, it can be sent to the computer equipment where the control chip 500 is located or the BMC of the server.
  • the counting unit 503 may be a counter in the control chip 500.
  • the obtaining unit 502 obtains the information of the partition readable by the optical module by acquiring the content corresponding to the control byte in the page byte of the optical module, and the control byte records the gated partition. Information.
  • the obtaining unit 502 is further configured to re-acquire the optical module readable when the acquisition of the optical module readable partition information fails and the recorded number of times of acquiring the optical module link negotiation information does not reach the preset threshold. Partition information.
  • the acquiring unit 502 is further configured to use a partition corresponding to the information of the readable partition acquired by the acquiring unit, which is different from the partition that stores the link negotiation information in the optical module, and records the acquired light.
  • a preset threshold for example, the first preset threshold or the second preset threshold
  • the control chip 500 exits the drive management process of the optical module.
  • the obtaining unit 502 obtains information of a readable partition; the control unit 501 stores information corresponding to the information of the readable partition obtained by the obtaining unit 502, and stores the information in the optical module.
  • the information of the partition that can be read by the optical module is modified to store the link negotiation in the optical module Information of the partitioned information to obtain link negotiation information of the optical module. In this way, a situation in which the control chip 500 fails to read the link negotiation information of the optical module due to a flash power failure or an abnormal reset of the link can be avoided, and the reliability of reading the link negotiation information of the optical module is improved.
  • the control chip 500 terminates obtaining the link negotiation information of the optical module.
  • the control chip 500 can also effectively process and improve the compatibility of reading the link negotiation information of the optical module.
  • FIG. 7 is a schematic structural diagram of a control device 700 according to an embodiment of the present application.
  • the control device 700 includes a control chip 701.
  • the control device 700 may be a control device in a storage system, and the control device 700 is connected to the storage device in the storage system through an optical module.
  • the control chip 701 detects the access of the optical module and starts the drive management process of the optical module.
  • the control chip 701 obtains the optical module link negotiation information, it may be implemented by referring to the implementation manner of the MCU in the method shown in FIG. 4A or FIG. 4B described above, or may also be referred to the implementation of the control chip 500 shown in FIG. 5 or FIG. 6 described above. Way to achieve. I won't go into details.
  • FIG. 8 is a schematic structural diagram of a storage device 800 according to an embodiment of the present application.
  • the storage device 800 includes a control chip 801.
  • the storage device 800 may be a storage device in a storage system, and is connected to a control device or a storage device in the storage system through an optical module.
  • the control chip 801 detects the access of the optical module and starts the drive management process of the optical module.
  • the control chip 801 obtains the optical module link negotiation information, it may be implemented by referring to the implementation method of the MCU in the method shown in FIG. 4A or FIG. 4B described above, or may also be referred to the implementation of the control chip 500 shown in FIG. 5 or FIG. 6 described above. Way to achieve. I won't go into details.
  • FIG. 9 is a schematic structural diagram of a storage system 900 according to an embodiment of the present application.
  • the storage system 900 includes a control device 901 and a storage device 902, where the control device 901 includes a control chip 9011, the storage device 902 includes a control chip 9021, the control device 901 is connected to the optical module 9012, and the storage device 902 It is connected to the optical module 9022, and the optical module 9012 and the optical module 9022 are connected through a communication link.
  • the optical module 9012 and the optical module 9022 may be connected through a SAS link.
  • the control chip 9011 After the optical module 9012 is connected to the control device 901, the control chip 9011 detects the access of the optical module 9012, and starts the drive management process of the optical module.
  • the control chip 9011 obtains the link negotiation information of the optical module 9012, it may be implemented by referring to the implementation manner of the MCU in the method shown in FIG. 4A or FIG. 4B described above, or may be referred to Way to achieve. I won't go into details.
  • the control chip 9021 After the optical module 9022 is connected to the storage device 902, the control chip 9021 detects the access of the optical module 9022, and starts the drive management process of the optical module.
  • the control chip 9021 obtains the link negotiation information of the optical module, it may be implemented by referring to the implementation method of the MCU in the method shown in FIG. 4A or FIG. 4B described above, or may also be referred to the implementation of the control chip 500 shown in FIG. 5 or FIG. 6 described above. Way to achieve. I won't go into details.
  • the disclosed systems, devices, and methods may be implemented in other ways.
  • the device embodiments described above are only schematic.
  • the division of the unit is only a logical function division.
  • multiple units or components may be combined or Can be integrated into another system, or some features can be ignored or not implemented.
  • the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may also be electrical, mechanical or other forms of connection.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, may be located in one place, or may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solutions of the embodiments of the present invention.
  • each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist separately physically, or two or more units may be integrated into one unit.
  • the above integrated unit may be implemented in the form of hardware or in the form of software functional unit.
  • the integrated unit When the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it may be stored in a computer-readable storage medium.
  • the technical solution of the present invention is essentially a part that contributes to the existing technology, or all or part of the technical solution may be embodied in the form of a software product, which is stored in a storage medium
  • Included are several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in the embodiments of the present invention.
  • the foregoing storage media include: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic disks or optical disks and other media that can store program codes .

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Abstract

一种获取光模块链路协商信息的方法、设备和系统，以解决获取光模块链路协商信息过程中可靠性低的问题。所述方法包括：获取光模块可读取的分区的信息；当获取的所述光模块可读取的分区的信息对应的分区，与所述光模块中存储链路协商信息的分区不同，且记录的获取光模块链路协商信息的次数未达到预设阈值时，将所述光模块可读取的分区的信息修改为所述光模块中存储链路协商信息的分区的信息；重新获取所述光模块可读取的分区的信息，并在获取的所述光模块可读取的分区的信息对应的分区，与所述光模块中存储链路协商信息的分区相同时，获取所述光模块的链路协商信息。

Description

获取光模块链路协商信息的方法、设备和系统 技术领域
本发明涉及信息技术(Information Technology，IT)领域，尤其涉及获取光模块链路协商信息的方法、设备和系统。
背景技术
小型计算机系统接口(small computer system interface，SCSI)是用于计算机和智能设备之间(包括但不限于硬盘、软驱、光驱、打印机、扫描仪等)系统级接口的独立处理器标准。
串行连接的SCSI(Serial Attached SCSI，SAS)接口，通过采用串行技术获得更高的传输速度，是继并行SCSI接口之后出现的一种全新接口。与传统的并行SCSI接口技术相比，改善了存储系统的性能、可用性和扩充性，并且拥有更高的传输速度、更长的传输距离和更好的抗干扰能力。SAS接口主要应用于服务器、大容量存储系统、磁盘阵列和高速互联网络等方面。
MINI SAS是新一代SAS接口，不仅具有优越的信号传输性能，同时还能满足板卡小型化的要求。MINI SAS光模块是SAS电缆和SAS光缆的身份标识，在企业存储和云存储中应用非常广泛。
现有技术在获取MINI SAS光模块信息的过程中，存在获取光模块链路协商信息时可靠性低的问题。
发明内容
本申请提供一种获取光模块链路协商信息的方法、设备和系统，以提高获取光模块链路协商信息的可靠性。
第一方面，本申请提供了一种获取光模块链路协商信息的方法，包括：
获取光模块可读取的分区的信息；
当获取的所述光模块可读取的分区的信息对应的分区，与所述光模块中存储链路协商信息的分区不同，且记录的获取光模块链路协商信息的次数未达到预设阈值时，将所述光模块可读取的分区的信息修改为所述光模块中存储链路协商信息的分区的信息；
重新获取所述光模块可读取的分区的信息，并在获取的所述光模块可读取的分区的信息对应的分区，与所述光模块中存储链路协商信息的分区相同时，获取所述光模块的链路协商信息。
上述方法中，先获取可读取的分区的信息，在获取的可读取的分区的信息对应的分区，与所述光模块中存储链路协商信息的分区不同，且记录的获取光模块链路协商信息的次数未达到预设阈值时，将所述光模块可读取的分区的信息修改为所述光模块中存储 链路协商信息的分区的信息，以获取所述光模块的链路协商信息。这样，可以避免现有技术中先将光模块可读取的分区的信息修改为所述光模块中存储链路协商信息的分区的信息，造成的在修改之后读取之前这段时间内，因供电闪断、链路异常复位等情况导致获取失败的情况。提高了读取光模块链路协商信息的可靠性。
上述方法中，在获取的所述光模块可读取的分区的信息对应的分区，与所述光模块中存储链路协商信息的分区相同时，表示选通的是所述光模块中存储链路协商信息的分区，即可以读取所述光模块中存储链路协商信息的分区中的信息。在这种情况下，获取所述光模块的链路协商信息成功率高，获取光模块链路协商信息的可靠性也高。
可选的，上述方法中，将所述光模块可读取的分区的信息修改为所述光模块中存储链路协商信息的分区的信息，可以通过将所述光模块中用于记录已经选通的所述光模块的分区的字段所对应的值，修改为所述光模块中存储链路协商信息的分区的信息所对应的值的方式实现。可选的，已经选通的所述光模块的分区是指可以读取其存储的内容的分区。
在一种可能的实现方式中，在所述重新获取所述光模块可读取的分区的信息之前，所述方法还包括：
将记录的获取光模块链路协商信息的次数加1。
在一种可能的实现方式中，在所述重新获取所述光模块可读取的分区的信息之后，所述方法还包括：
如果获取的所述光模块可读取的分区的信息对应的分区，与所述光模块中存储链路协商信息的分区不同，且记录的获取光模块链路协商信息的次数未达到所述预设阈值时，则再次将所述光模块可读取的分区的信息修改为所述光模块中存储链路协商信息的分区的信息；再次获取所述光模块可读取的分区的信息，并再次将记录的获取光模块链路协商信息的次数加1。
在一种可能的实现方式中，所述光模块的链路协商信息，用于对所述光模块驱动管理过程中的链路协商；所述光模块的链路协商信息包括：
连接器类型、光电参数、多模或单模、电压和发送偏移。
可选的，所述光模块的链路协商信息还包括工作温度或厂商信息等。
可选的，所述方法是由微控制单元(Microcontroller Unit，MCU)实现。所述MCU与所述光模块之间通过I2C总线(Inter Integrated Circuit bus，I2C bus)连接。
可选的，所述MCU是存储系统的控制设备中的MCU，或所述MCU是存储系统的存储设备中的MCU。
可选的，所述光模块是MINI SAS光模块。所述存储链路协商信息的分区是MINI SAS光模块中的page0分区。
可选的，所述光模块可读取的分区的信息，是所述光模块选通的分区的信息。例如，当光模块选通page0分区，则MCU可以通过与光模块之间的连接读取page0分区中的信息。
可选的，所述预设阈值为3。可选的，所述记录的获取光模块链路协商信息的次数的预设阈值，可以是第一预设阈值。
可选的，上述将记录的获取光模块链路协商信息的次数加1，是通过所述MCU中的计数器加1的方式实现。例如，可以通过对第一计数器加1的方式实现。
在一种可能的实现方式中，所述方法还包括：通过获取所述光模块的page select byte中的控制字节对应的内容获取光模块可读取的分区的信息，所述控制字节记录的是选通的分区的信息。例如，所述光模块的page select byte中的控制字节对应的内容为0，表明选通的分区为page0分区。
可选的，page select byte中的控制字节是所述page select byte中的第127位字节。
在一种可能的实现方式中，所述方法还包括：
如果获取的所述光模块可读取的分区的信息对应的分区，与所述光模块中存储链路协商信息的分区不同，且记录的获取光模块链路协商信息的次数达到所述预设阈值，则终止获取光模块的链路协商信息。
上述在获取的所述光模块可读取的分区的信息对应的分区与所述光模块中存储链路协商信息的分区不同，且记录的获取光模块链路协商信息的次数达到所述预设阈值时，终止获取光模块的链路协商信息。所述终止获取光模块的链路协商信息，可以通过退出光模块的驱动管理流程的方式实现。这样，对于不支持分区选通字段写操作的光模块，例如不支持page select byte写的光模块，也给出了有效的处理机制，提高了读取光模块链路协商信息的兼容性。
在一种可能的实现方式中，所述方法还包括：
当获取所述光模块可读取的分区的信息失败且记录的获取光模块链路协商信息的次数未达到预设阈值时，重新获取所述光模块可读取的分区的信息，并将记录的获取光模块链路协商信息的次数加1。可选的，可以通过对所述第一计数器加1的方式，在获取所述光模块可读取的分区的信息失败时，将记录的获取光模块链路协商信息的次数加1。即当获取所述光模块可读取的分区的信息失败时，可以只通过所述第一计数器，记录获取光模块链路协商信息的次数。
在一种可能的实现方式中，所述方法还包括：
当获取所述光模块可读取的分区的信息失败时，重新获取所述光模块可读取的分区的信息。
可选的，可以对获取光模块可读取的分区信息失败的次数通过另外一个计数器计数。当获取光模块可读取的分区信息失败的次数达到预设的另外一个预设阈值时，例如第二预设阈值时，发送获取光模块可读取的分区信息失败的信息。可选的，可以通过MCU中的第二计数器对获取光模块可读取的分区信息失败的次数进行统计。当获取光模块可读取的分区信息失败时，将所述第二计数器加1。即用于记录获取光模块可读取的分区信息失败次数的计数器，可以与用于记录获取光模块链路协商信息的次数的计数器可以不同。
第二方面，本申请提供了一种控制芯片，包括控制单元和获取单元，
所述获取单元，用于获取光模块可读取的分区的信息；
所述控制单元，用于在所述获取单元获取的所述光模块可读取的分区的信息对应的分区，与所述光模块中存储链路协商信息的分区不同，且记录的获取光模块链路协商 信息的次数未达到预设阈值时，将所述光模块可读取的分区的信息修改为所述光模块中存储链路协商信息的分区的信息；
所述获取单元，还用于重新获取所述光模块可读取的分区的信息，并在获取的所述光模块可读取的分区的信息对应的分区，与所述光模块中存储链路协商信息的分区相同时，获取所述光模块的链路协商信息。
上述控制芯片中，获取单元获取所述光模块可读取的分区的信息；控制单元在所述获取单元获取的所述光模块可读取的分区的信息对应的分区，与所述光模块中存储链路协商信息的分区不同，且记录的获取光模块链路协商信息的次数未达到预设阈值时，将所述光模块可读取的分区的信息修改为所述光模块中存储链路协商信息的分区的信息，以获取所述光模块的链路协商信息。这样，能够避免因供电闪断、链路异常复位等情况导致控制芯片读取光模块链路协商信息失败的情况，提高了读取光模块链路协商信息的可靠性。
可选的，所述控制单元将所述光模块可读取的分区的信息修改为所述光模块中存储链路协商信息的分区的信息，可以通过所述控制单元将所述光模块中用于记录已经选通的所述光模块的分区的字段对应的值，修改为所述光模块中存储链路协商信息的分区的信息所对应的值的方式实现。可选的，已经选通的所述光模块的分区是指可以读取其存储的内容的分区。
可选的，所述控制芯片是存储系统的控制设备中的控制芯片，或所述控制芯片是存储系统的存储设备中的控制芯片。
可选的，所述光模块是MINI SAS光模块。所述存储链路协商信息的分区是MINI SAS光模块中的page0分区。
可选的，所述光模块可读取的分区的信息，是所述光模块选通的分区的信息。例如，当控制芯片为MCU，光模块为MINI SAS光模块，如果光模块选通page0分区，则MCU可以通过与光模块之间的连接读取page0分区中的信息。可选的，所述预设阈值为3。可选的，所述记录的获取光模块链路协商信息的次数的预设阈值，可以是第一预设阈值。
在一种可能的实现方式中，所述光模块的链路协商信息，用于对所述光模块驱动管理过程中的链路协商；所述光模块的链路协商信息包括：
连接器类型、光电参数、多模或单模、电压和发送偏移。
可选的，所述光模块的链路协商信息还包括工作温度或厂商信息等。
在一种可能的实现方式中，所述控制芯片还包括计数单元；
所述计数单元用于在将所述光模块可读取的分区的信息修改为所述光模块中存储链路协商信息的分区的信息后，将记录的获取光模块信息的次数加1。
在一种可能的实现方式中，所述计数单元还用于当获取所述光模块可读取的分区的信息失败且记录的获取光模块链路协商信息的次数未达到预设阈值时，将记录的获取光模块链路协商信息的次数加1。
可选的，上述计数单元可以是所述控制芯片中的计数器。
在一种可能的实现方式中，所述获取单元还用于在所述获取单元获取的所述光模块可读取的分区的信息对应的分区，与所述光模块中存储链路协商信息的分区不同，且记录的获取光模块链路协商信息的次数达到预设阈值时，终止获取所述光模块的链路协商 信息。
由于在获取的所述光模块可读取的分区的信息对应的分区与所述光模块中存储链路协商信息的分区不同，且记录的获取光模块链路协商信息的次数达到所述预设阈值时，所述控制芯片中的获取单元终止获取所述光模块的链路协商信息。例如，可以通过所述控制芯片退出光模块的驱动管理流程的方式，使得所述获取单元终止获取所述光模块的链路协商信息。这样，对于不支持分区选通字段写操作的光模块，例如不支持page select byte写的光模块，所述控制芯片也能够有效处理，，提高了读取光模块链路协商信息的兼容性。
在一种可能的实现方式中，所述获取单元还用于当获取光模块可读取的分区的信息失败时，重新获取光模块可读取的分区的信息。
可选的，可以通过所述控制芯片中的另一计数单元对获取光模块可读取的分区的信息失败的次数进行计数。当所述另一计数单元计数达到预设的另外一个预设阈值时，例如第二预设阈值时，所述控制芯片发送获取光模块可读取的分区的信息失败的信息。
可选的，上述另一计数单元可以是所述控制芯片中的另一计数器。
在一种可能的实现方式中，所述获取单元通过获取所述光模块的page select byte中的控制字节对应的内容获取光模块可读取的分区的信息，所述控制字节记录的是选通的分区的信息。例如，光模块的page select byte中的控制字节对应的内容为0，表明选通的分区为page0分区。
可选的，page select byte中的控制字节是所述page select byte中的第127位字节。
在一种可能的实现方式中，所述获取单元还用于当获取光模块可读取的分区的信息失败且记录的获取光模块链路协商信息的次数未达到预设阈值时，重新所述获取光模块可读取的分区的信息。
第三方面，本申请还提供一种控制设备，包括中央处理器、主存储器，以及上述第二方面所述的控制芯片。
第四方面，本申请还提供一种存储设备，包括存储介质以及上述第二方面所述的控制芯片。
第五方面，本申请还提供一种存储系统，所述存储系统包括控制设备和存储设备，
所述控制设备包括中央处理器、主存储器，以及上述第二方面所述的控制芯片；
所述存储设备包括存储介质以及上述第二方面所述的控制芯片。
第六方面，本申请提供了一种计算机存储介质，用于储存为控制芯片所用的计算机软件指令，其包含用于执行上述第一方面方面所设计的程序。
第七方面，本申请提供了一种计算机程序，当计算机设备或服务器中的控制芯片运行该计算机程序时，该控制芯片执行上述第二方面中所述控制芯片的功能。
附图说明
为了更清楚地说明本申请实施例的技术方案，下面将对实施例描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于 本领域普通技术人员来讲，在不付出创造性劳动性的前提下，还可以根据这些附图获得其他的附图。
图1A为本申请实施例提供的存储系统的一种结构示意图；
图1B为本申请实施例提供的存储系统的另一种结构示意图；
图2为本申请实施例提供的MCU通过I2C总线与MINI SAS光模块连接的结构示意图；
图3为本申请实施例提供的MCU获取光模块信息的流程示意图；
图4A为本申请实施例提供的一种获取光模块链路协商信息的方法流程示意图；
图4B为本申请实施例提供的一种获取光模块链路协商信息的具体方法流程示意图；
图5为本申请实施例提供的一种控制芯片500的结构示意图；
图6为本申请实施例提供的另一种控制芯片500的结构示意图；
图7为本申请实施例提供的控制设备700的结构示意图；
图8为本申请实施例提供的存储设备800的结构示意图；
图9为本申请实施例提供的存储系统900的结构示意图。
具体实施方式
下面结合附图，对本发明的实施例进行描述。
本申请实施例中的术语“第一”、“第二”仅用于描述目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括一个或者更多个该特征。
图1A为存储系统的一种结构示意图，包括控制设备100和存储设备200。控制设备100主要包括中央处理器(central processing unit，CPU)、主存储器(例如随机存取存储器RAM等)以及MCU等硬件资源。图1A中以只显示MCU101为例进行说明。存储设备200用于存储数据，可以包括但不限于硬盘驱动器(hard disk drive，HDD)、固态硬盘(solid-state disk，SSD)等存储介质。图1A中以存储设备200包括硬盘为例进行说明。控制设备100与光模块102连接，存储设备200与光模块202连接，光模块102与光模块202之间通过SAS线缆连接，实现控制设备100与存储设备200之间的通信。
光模块102接入控制设备100后，控制设备100中的MCU101能够检测到光模块的接入，启动驱动的管理流程，以建立与光模块102的连接。本申请实施例中，MCU是一种具有管理控制功能的芯片，为不同的应用场合做不同的组合控制。例如，MCU可以是把CPU的频率与规格做适当缩减，并将主存储器(memory)、计时器(Timer)、计数器、通用串行总线(Universal Serial Bus，USB)、模/数(analog/digit，A/D)转换、通用异步收/发器(universal asynchronous receiver/transmitter，UART)、可编程序逻辑控制器(programmable logic controller，PLC)、直接内存访问(direct memory access，DMA)等周边接口，甚至光耦合器件(light coupled device，LCD)驱动电路都整合在单一芯片上，形成芯片级的计算机。
MCU101与光模块102之间，可以通过I2C总线通信，即MCU101可以通过I2C总线获取光模块102的内部信息。由于I2C总线结构清晰，包括一根数据线和一根时钟线， 并且实现原理简单，是获取光模块信息的常用总线。但本申请实施例不限定MCU101与光模块102之间的通信总线的形式，其它能够实现MCU101获取光模块102内部信息的总线，也可以通过本申请实施例提供的技术方案来实现。本申请实施例以I2C总线为例进行说明。
同样的，MCU201在检测到光模块202接入存储设备200后，通过I2C总线启动驱动的管理流程，并建立与光模块202的连接。
图1A只是以一个控制设备和一个存储设备为例进行说明。可以理解，在具体实现时，控制设备100还可以连接多个存储设备。当控制设备连接多个存储设备的情况下，每个控制设备通过光模块与存储设备连接的实现方式，与控制设备100与存储设备200的连接的实现方式类似，不再赘述。
图1B为另一种场景下存储系统实现的结构示意图。图1B中，存储设备200还与存储设备300通过SAS线缆连接，即存储设备200通过光模块204、SAS线缆和光模块302，与存储设备300连接。存储设备300中的MCU301和光模块302的连接关系，与存储设备200中MCU203和光模块204的连接关系类似，不再赘述。
可以理解，上述SAS通道只是举例。在具体实现时，控制设备与存储设备之间，也可以通过快速外围部件互连(Peripheral Component Interconnect Express，PCIe)通道或以太网通道等。本申请实施例以SAS通道为例进行说明，但本申请实施例公开的技术方案并不限定于SAS通道的实现方式，对于PCIe通道或以太网通道等其它实现方式，也可以参照SAS通道的实现方式来实现，不再赘述。
图1A和图1B所示的通信系统中，控制设备100与存储设备200之间通信的稳定性，以及存储设备200与存储设备300之间通信的稳定性，决定着存储系统的性能和稳定性。控制设备100与存储设备200之间通信的稳定性，取决于光模块102通过SAS线缆与光模块202之间通信的稳定性。存储设备200与存储设备300之间通信的稳定性，取决于光模块204通过SAS线缆与光模块302之间通信的稳定性。
在影响高速SAS通信通道稳定性的因素中，MCU获取光模块中链路协商的信息，以进行链路协商是关键因素。如果MCU获取光模块链路协商信息失败，就会影响到链路协商的成功与否，最终影响SAS通道的稳定性。
MCU在检测到光模块接入后，会启动对光模块的驱动管理过程。在对光模块的驱动管理过程中，MCU会获取光模块链路协商的信息。例如：MCU101在对光模块102的驱动管理中，会获取光模块102的内部关于链路协商相关的信息以进行链路协商；MCU201对光模块202的驱动管理中会获取光模块202的内部关于链路协商相关的信息以进行链路协商。
以MINI SAS光模块为例，光模块内部共存储有四个分区的分区信息：page0-page3，其中用于链路协商的信息存放在page0分区，page1-page3主要是扩散信息部分，有应用编码，用户自定义区间等等。在具体实现时，MCU可以通过I2C协议读/写配置page select byte字段，选择page分区并读取分区中的信息。
参考图2，图2为MCU通过I2C总线与MINI SAS光模块连接，以及光模块内部分区信息的结构示意图。可以理解，MCU也可以通过其它总线与光模块连接，只要能够实现光模块信息的获取，都在本申请实施例公开的范围之内。
MCU对MINI SAS光模块的驱动管理包括但不限于：光模块在位检查、光模块信息获取、根据获取到的信息进行带外参数配置和使能SAS链路速率协商。其中：
光模块在位检查，主要是监控光模块是否接入系统。
光模块信息获取，主要是获取光模块链路协商的信息，一般而言，即为page0分区的信息。光模块链路协商信息包括但不限于连接器类型，是光缆还是电缆，光电参数，多模或单模，电压和发送偏移等信息。光模块链路协商信息还可以包括工作温度或厂商等信息。
带外参数配置，主要是根据获取到的光模块内部信息，进行链路参数，例如预加重，摆幅，中心参数等配置。
使能链路协商，主要是开启SAS链路速率协商。
在上述四项驱动管理中，光模块链路协商信息的获取是整个驱动管理的核心部分，直接关系链路的稳定。
图3为基于图2所示的场景，MCU获取光模块信息的流程示意图。如图3所示，包括：
步骤100：MCU检测到MINI SAS光模块接入后，首先将page select byte配置为0，选通page0分区；
MCU将page select byte配置为0时，即选通page0分区。MCU选通page0分区后，就可以获取page0分区的信息。
步骤102：MCU读取page0的信息；
步骤104：判断读取page0信息是否成功，如果成功，则执行步骤106，如果不成功，则执行108；
步骤106：读取成功，根据获取到的page0的信息，进行链路协商等驱动管理的后续流程；
步骤108：读取失败，退出驱动管理流程。
上述步骤102中，MCU获取page0信息只执行一次，没有确认机制，导致获取page0信息时可靠性不高。并且，在一些场景下，例如供电闪断、I2C主异常复位等场景，存在首次I2C访问不稳定因素，可能获取信息异常或读取到其他分区的参数等，导致参数配置失败和链路协商的失败。
此外，部分厂商所生产的光模块的驱动访问接口未遵循SFF-8636 Specification for COMMON MANAGEMENT INTERFACE管理协议，不支持写page select byte操作。这些光模块在接入控制设备或存储设备时，驱动管理过程中也无法读取光模块的信息，没有有效的处理机制。其中，所述SFF为Small Form Factor的缩写，主要用于定义存储系统上的一些接插件标准。
本申请实施例提供一种获取光模块链路协商信息的方法，以解决上述获取光模块信息时可靠性不高的问题。
参考图4A，为本申请实施例提供的一种获取光模块链路协商信息的方法流程示意图，所述方法包括：
步骤200A：获取光模块可读取的分区的信息；
步骤202A：当获取的所述光模块可读取的分区的信息对应的分区，与所述光模块中 存储链路协商信息的分区不同，且记录的获取光模块链路协商信息的次数未达到预设阈值时，将所述光模块可读取的分区的信息修改为所述光模块中存储链路协商信息的分区的信息；
步骤204A：重新获取所述光模块可读取的分区的信息，并在获取的所述光模块可读取的分区的信息对应的分区，与所述光模块中存储链路协商信息的分区相同时，获取所述光模块的链路协商信息。
上述方法通过先获取可读取的分区的信息，在获取的可读取的分区的信息对应的分区，与所述光模块中存储链路协商信息的分区不同，且记录的获取光模块链路协商信息的次数未达到预设阈值时，将所述光模块可读取的分区的信息修改为所述光模块中存储链路协商信息的分区的信息，以获取所述光模块的链路协商信息。这样，可以避免现有技术中先将光模块可读取的分区的信息修改为所述光模块中存储链路协商信息的分区的信息，造成的在修改之后读取之前这段时间内，因供电闪断、链路异常复位等情况导致获取失败的情况。提高了读取光模块链路协商信息的可靠性。
上述方法可以由MCU实现，该MCU可以是存储系统中作为控制设备的计算机设备或服务器中的MCU，也可以是存储系统中作为存储设备的计算机设备或服务器中的MCU。
可选的，在所述步骤204A之前，所述方法还包括：将记录的获取光模块链路协商信息的次数加1。
可选的，上述将记录的获取光模块链路协商信息的次数加1，可以通过MCU中的计数器加1的方式实现。例如，可以通过MCU中的第一计数器记录获取光模块链路协商信息的次数。可以在MCU将所述光模块可读取的分区的信息修改为所述光模块中存储链路协商信息的分区的信息后，将所述第一计数器加1。
可选的，所述预设阈值可以为第一预设阈值。所述第一预设阈值可以为3次。
可选的，在所述步骤204A之后，所述方法还包括：
如果获取的所述光模块可读取的分区的信息对应的分区，与所述光模块中存储链路协商信息的分区不同，且记录的获取光模块链路协商信息的次数未达到所述预设阈值时，则再次将所述光模块可读取的分区的信息修改为所述光模块中存储链路协商信息的分区的信息，再次获取所述光模块可读取的分区的信息，并再次将记录的获取光模块链路协商信息的次数加1。具体的，再次将记录的获取光模块链路协商信息的次数加1，可以通过将所述第一计数器加1的方式实现。
在一种可能的实现方式中，上述方法还可以包括：
如果获取的可读取的分区的信息对应的分区，与所述光模块中存储链路协商信息的分区不同，且记录的获取光模块链路协商信息的次数达到所述预设阈值，则终止获取光模块的链路协商信息。
终止获取光模块的链路协商信息的方式，可以是退出光模块的驱动管理流程。这样，对于不支持分区选通字段写操作的光模块，例如不支持page select byte写的光模块，也给出了有效的处理机制。从而提供了在光模块不支持分区选通字段写操作的处理方式，提高了读取光模块链路协商信息的兼容性。
可选的，在所述步骤200A之后，可能会因为MCU与光模块之间的链路的问题导致获取光模块可读取的分区的信息失败。在这种情况下，所述方法还可以包括：判断记录 的获取光模块链路协商信息的次数是否达到所述预设阈值，如果未达到所述预设阈值，则重新执行步骤200A，并将记录的获取光模块链路协商信息的次数加1。具体的，在获取光模块链路协商信息失败后，可以对所述第一计数器加1，作为记录的获取光模块链路协商信息的次数。
当然，获取光模块链路协商信息失败的原因有些是暂时的、可修复的，有些是不可修复的。为避免在获取光模块链路协商信息失败重复执行步骤200A导致的死循环等原因，可以针对获取光模块链路协商信息失败设置第二计数器，用于记录获取光模块可读取的分区的信息的次数。每执行步骤200A失败一次，所述第二计数器加1一次。当所述第二计数器记录的次数达到一定预设阈值，例如达到第二预设阈值时，则发送获取光模块链路协商信息失败的信息，并停止执行步骤200A。可选的，所述第二预设阈值可以为10。
作为另外一种实现方式，在所述步骤200A之后，如果获取光模块可读取的分区的信息失败，可以不用计数，即不需要将所述第一计数器加1，直接重新执行步骤200A。
可选的，所述光模块的链路协商信息，用于对所述光模块驱动管理过程中的链路协商；所述光模块的链路协商信息可以包括：连接器类型、光电参数、多模或单模、电压和发送偏移。
可选的，所述光模块的链路协商信息还可以包括工作温度或厂商信息等。
可选的，上述步骤200A中，可以通过获取所述光模块的page select byte中的控制字节获取光模块可读取的分区的信息。所述控制字节记录的是选通的分区的信息，选通分区后，MCU可以读取选通的分区的信息。可选的，所述光模块的page select byte中的控制字节可以是所述page select byte中的第127位字节。
下面以MINI SAS光模块为例，对本申请实施例提供的一种获取光模块链路协商信息的方法进行说明。如图4B所示，所述方法包括：
步骤200B：MCU检测到光模块接入后，获取page select byte控制字节；
所述page select byte控制字节，记录的是光模块可读取的分区的信息。光模块中包括page select byte字段，可以用于实现光模块分区的选择。其中的page select byte控制字节，记录的是可读取的分区的信息。
例如，如果page select byte控制字节记录的值为0，表示可读取page0分区的信息；如果page select byte控制字节记录的值为3，表示可读取page3分区的信息。
在一种实现方式中，page select byte中的第127位为page select byte控制字节。即MCU可以通过获取page select byte中第127位字节的内容，获取可读取的分区的信息。
本步骤中，当MCU检测到光模块接入系统后，通过通信总线(例如I2C总线)向光模块发送获取page select byte控制字节的指示。可以避免现有技术中，MCU先向page select byte控制字节写0然后再读取page0信息时，在page select byte控制字节被写0之后MCU读取page0之前这段时间内，因为供电闪断、I2C主异常复位等情况导致MCU读取page0信息失败的情况。
同时，如果page select byte控制字节记录的值为0，说明可读取的分区是page0分区。即在可读取的分区刚好就是page0分区的情况下，就可以减少执行写page select  byte字段的步骤，能够提升获取光模块信息的效率。
步骤202B：MCU判断是否获取成功；如果成功则执行步骤206B，如果失败则执行步骤204B；
以MCU通过I2C总线与光模块连接为例，MCU会基于I2C通信协议关于获取成功的判断标准，判断获取page select byte控制字节是否成功。I2C总线包括时钟线和数据线，MCU会通过数据线接收光模块传输的内容。接收到的内容，包括但不限于：校验位、应答信号、数据内容等。MCU接收到光模块通过数据线传输的内容后，根据I2C通信协议判断获取是否成功。
需要说明的是，在本步骤中，MCU只需要判断获取是否成功，不需要判断获取的内容。
步骤204B：MCU进行重试，重新执行步骤200B；
在具体实现时，可能会因为I2C链路故障导致MCU获取page select byte控制字节时失败。在这种情况下，MCU重新获取光模块链路协商的信息，即重新执行步骤200B。
同时MCU可以将记录的获取光模块链路协商信息的次数加1。具体实现时，可以通过计数器的方式，设置计数值。计数值默认为0，当首次执行步骤204B时，将计数器加1，依次类推。例如，可以将MCU中的第一计数器加1，以记录获取光模块链路协商信息的次数。
可选的，MCU也可以通过第二计数器，用于记录获取光模块链路协商信息失败的次数。当所述第二计数器达到预设的第二预设阈值，例如所述第二预设阈值为10时，不再执行步骤204B，也不再返回执行步骤200B。即MCU获取page select byte控制字节失败的次数所用的计数器，与统计下面步骤214B中将page select byte控制字段写0时的计数器不同。这样，可以针对不同的情况分别统计不同的执行次数，在分别达到不同的预设阈值时，进行不同的处理，能够提高获取光模块链路协商信息时的处理精度。
可选的，MCU还可以向MCU所在的计算机设备或服务器中的管理控制器，例如主板管理控制(baseboard management controller)BMC，发送获取失败的信息。
步骤206B：MCU获取page select byte控制字节成功，MCU判断获取到的page select byte控制字节的值是否为0。如果为0，说明已经选通page0分区，能够读取page0分区的信息，则执行步骤208B；如果不为0，说明还未选通page0分区，还不能读取page0分区的信息，则执行步骤210B；
需要说明的是，上述是以page select byte控制字节的值为0作为选通page0分区的实现方式进行描述的。在具体实现时，也可以用其它的值作为选通page0的page select byte控制字节的值。本申请实施例不限定具体的代表选通page0分区的值。
步骤208B：MCU读取page0分区的信息，并执行光模块驱动管理中读取page0分区成功的后续流程；
步骤210B：判断记录的获取光模块信息的次数是否达到预设阈值；如果超过预设阈值，则执行步骤212B，如果未超过预设阈值，则执行步骤214B；
具体实现时，可以通过计数器计数的方式，记录获取光模块链路协商信息的次数。例如，可以是判断上述步骤204B中的第一计数器记录的值是否超过预设阈值。当第一计数器记录的值达到预设阈值，例如达到上述第一预设阈值时，则执行步骤212B；当第 一计数器记录的值未达到预设阈值，例如未达到上述第一预设阈值时，则执行步骤214B。
通过同一个计数器，例如第一计数器，对不同情况下获取光模块链路协商信息未成功都作为一次获取的尝试，可以在达到预设阈值仍未成功获取光模块链路协商信息时，不再尝试获取，并退出驱动管理流程，能够提高获取光模块链路协商信息时的效率。
当记录的获取光模块信息的次数达到预设阈值时，例如第一预设阈值时，说明存在的故障较严重，获取光模块信息失败。在这种情况下，不再获取光模块信息，退出光模块驱动管理流程。
可选的，所述第一预设阈值为3。在具体实现时，还可以根据具体的业务需求灵活设置，例如所述第一预设阈值也可以为2次或4次等，本申请实施例不做具体限定。
步骤212B：获取光模块信息失败，退出驱动管理流程；
MCU确定获取page0信息失败，退出驱动管理流程，本次驱动管理流程结束。
步骤214B：MCU将page select byte控制字段写0，以选通page0分区，并将记录的获取光模块信息的次数加1；
具体的，MCU可以通过I2C总线向光模块发送指令，所述指令用于指示光模块将page select byte控制字段写0，以选通page0分区。选通page0分区后，MCU即能够读取page0分区中的信息。
将记录的获取光模块信息的次数加1，可以通过将上述步骤204B、步骤210B中统计次数的所述第一计数器加1的方式来实现。这样，能够提高获取光模块链路协商信息时的效率
上述图4B所示的方法实施例中，MCU在检测到光模块接入后，先获取page select byte控制字节的内容。如果获取成功再判断选通的是否为page0分区。在选通的不是page0分区时，向page select byte控制字节写入page0分区对应的值，并重新获取page select byte控制字节的内容再次尝试获取page0分区的信息。这样，能够避免因供电闪断、I2C主异常复位等情况导致MCU读取page0信息失败的情况，提高了读取page0分区信息的可靠性。
并且，无论MCU将page select byte控制字节写0操作成功与否，都返回执行步骤200B。这样，对于支持page select byte控制字节写操作的光模块，重新执行步骤200B后能够获取的光模块的信息，以进行后续的驱动管理的流程。对于不支持page select byte控制字节写操作的光模块，重新执行步骤200B后，如果在步骤210B判断达到预设阈值，就结束光模块的驱动管理流程。即在光模块不兼容的情况下，也有有效的处理机制来处理，提高了获取光模块链路协商信息时的兼容性。
本申请实施例中，上述是以MINI SAS光模块为例进行说明。对于其它的光模块，例如网卡的光模块、光纤通道(Fiber Channel，FC)的光模块、以及PCIE的光模块，由于驱动的机制或方式都类似，也可以使用本申请实施例提供的方案。
图5为本申请实施例提供的一种控制芯片500的结构示意图。如图5所示，控制芯片500包括控制单元501和获取单元502，
所述获取单元501，用于获取光模块可读取的分区的信息；
所述控制单元502，用于在所述获取单元获取的所述光模块可读取的分区的信息对应的分区，与所述光模块中存储链路协商信息的分区不同，且记录的获取光模块链路协 商信息的次数未达到预设阈值时，将所述光模块可读取的分区的信息修改为所述光模块中存储链路协商信息的分区的信息；
所述获取单元502，还用于重新获取所述光模块可读取的分区的信息，并在获取的所述光模块可读取的分区的信息对应的分区，与所述光模块中存储链路协商信息的分区相同时，获取所述光模块的链路协商信息。
其中，所述光模块的链路协商信息，用于对所述光模块驱动管理过程中的链路协商；
所述光模块的链路协商信息包括：连接器类型、光电参数、多模或单模、电压和发送偏移。
可选的，所述光模块的链路协商信息还包括工作温度或厂商信息等。
可选的，如图6所示，控制芯片500还包括计数单元503；
所述计数单元503用于在将所述光模块可读取的分区的信息修改为所述光模块中存储链路协商信息的分区的信息后，将记录的获取光模块信息的次数加1。
可选的，所述计数单元503还用于当获取光模块可读取的分区信息失败且记录的获取光模块链路协商信息的次数未达到预设阈值时，将记录的获取光模块链路协商信息的次数加1。
在一种可能的实现方式中，所述获取单元503还用于当获取光模块可读取的分区信息失败时，重新获取光模块可读取的分区信息。
可选的，可以通过所述控制芯片500中的另一计数单元，例如第二计数单元(图中未示出)，统计获取光模块可读取的分区信息失败的次数。当所述另一计数单元计数达到预设的另外一个预设阈值时，例如第二预设阈值时，所述控制芯片500可以退出光模块的驱动管理流程，并发送获取光模块可读取的分区信息失败的信息。例如可以发送给控制芯片500所在的计算机设备或服务器的BMC等。
可选的，所述计数单元503可以是所述控制芯片500中的计数器。
可选的，所述获取单元502通过获取所述光模块的page select byte中的控制字节对应的内容获取光模块可读取的分区的信息，所述控制字节记录的是选通的分区的信息。
可选的，所述获取单元502还用于当获取光模块可读取的分区信息失败且记录的获取光模块链路协商信息的次数未达到预设阈值时，重新获取光模块可读取的分区信息。
可选的，所述获取单元502还用于在所述获取单元获取的可读取的分区的信息对应的分区，与所述光模块中存储链路协商信息的分区不同，且记录的获取光模块链路协商信息的次数达到预设阈值(例如上述第一预设阈值或上述第二预设阈值)时，终止获取所述光模块的链路协商信息。
所述获取单元502终止获取所述光模块的链路协商信息后，所述控制芯片500退出光模块的驱动管理流程。
上述控制芯片500的实现方式中，获取单元502获取可读取的分区的信息；控制单元501在所述获取单元502获取的可读取的分区的信息对应的分区，与所述光模块中存储链路协商信息的分区不同，且记录的获取光模块链路协商信息的次数未达到预设阈值时，将所述光模块可读取的分区的信息修改为所述光模块中存储链路协商信息的分区的信息，以获取所述光模块的链路协商信息。这样，能够避免因供电闪断、链路异常复位 等情况导致控制芯片500读取光模块链路协商信息失败的情况，提高了读取光模块链路协商信息的可靠性。
同时，由于在获取的可读取的分区的信息对应的分区与所述光模块中存储链路协商信息的分区不同，且记录的获取光模块链路协商信息的次数达到所述预设阈值时，所述控制芯片500中的获取单元502终止获取光模块的链路协商信息。对于不支持分区选通字段写操作的光模块，例如不支持page select byte写的光模块，所述控制芯片500也能够有效的处理，提高了读取光模块链路协商信息的兼容性。
图7为本申请实施例提供的控制设备700的结构示意图。如图7所示，所述控制设备700包括控制芯片701。具体的，控制设备700可以是存储系统中的控制设备，控制设备700通过光模块与存储系统中的存储设备连接。当光模块连接到控制设备700后，控制芯片701检测到光模块的接入，启动光模块的驱动管理流程。当控制芯片701获取光模块链路协商信息时，可以参照上述图4A或图4B所示的方法中MCU的实现方式来实现，也可以参照上述图5或图6所示的控制芯片500的实现方式来实现。具体不再赘述。
图8为本申请实施例提供的存储设备800的结构示意图。如图8所示，所述存储设备800包括控制芯片801。具体的，存储设备800可以是存储系统中的存储设备，并通过光模块与存储系统中的控制设备或存储设备连接。当光模块连接到存储设备800后，控制芯片801检测到光模块的接入，启动光模块的驱动管理流程。当控制芯片801获取光模块链路协商信息时，可以参照上述图4A或图4B所示的方法中MCU的实现方式来实现，也可以参照上述图5或图6所示的控制芯片500的实现方式来实现。具体不再赘述。
图9为本申请实施例提供的存储系统900的结构示意图。如图9所示，所述存储系统900包括控制设备901和存储设备902，其中，控制设备901包括控制芯片9011，存储设备902包括控制芯片9021，控制设备901与光模块9012连接，存储设备902与光模块9022连接，光模块9012与光模块9022通过通信链路连接。例如光模块9012与光模块9022可以通过SAS链路连接。
当光模块9012与控制设备901连接后，控制芯片9011检测到光模块9012的接入，启动光模块的驱动管理流程。当控制芯片9011获取光模块9012链路协商信息时，可以参照上述图4A或图4B所示的方法中MCU的实现方式来实现，也可以参照上述图5或图6所示的控制芯片500的实现方式来实现。具体不再赘述。
当光模块9022与存储设备902连接后，控制芯片9021检测到光模块9022的接入，启动光模块的驱动管理流程。当控制芯片9021获取光模块链路协商信息时，可以参照上述图4A或图4B所示的方法中MCU的实现方式来实现，也可以参照上述图5或图6所示的控制芯片500的实现方式来实现。具体不再赘述。
本领域普通技术人员可以意识到，结合本文中所公开的实施例描述的各示例的单元及方法步骤，能够以电子硬件、计算机软件或者二者的结合来实现，为了清楚地说明硬件和软件的可互换性，在上述说明中已经按照功能一般性地描述了各示例的组成及步骤。这些功能究竟以硬件还是软件方式来执行，取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能，但是这种实现不应认为超出本发明的范围。
所属领域的技术人员可以清楚地了解到，为了描述的方便和简洁，上述描述的设备、 单元和系统的具体实现方式，可以参考前述方法实施例中的对应方式来实现，在此不再赘述。
在本申请所提供的几个实施例中，应该理解到，所揭露的系统、设备和方法，可以通过其它的方式实现。例如，以上所描述的装置实施例仅仅是示意性的，例如，所述单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到另一个系统，或一些特征可以忽略，或不执行。另外，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口、装置或单元的间接耦合或通信连接，也可以是电的，机械的或其它的形式连接。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本发明实施例方案的目的。
另外，在本发明各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以是两个或两个以上单元集成在一个单元中。上述集成的单元既可以采用硬件的形式实现，也可以采用软件功能单元的形式实现。
所述集成的单元如果以软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在一个计算机可读取存储介质中。基于这样的理解，本发明的技术方案本质上或者说对现有技术做出贡献的部分，或者该技术方案的全部或部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质中，包括若干指令用以使得一台计算机设备(可以是个人计算机，服务器，或者网络设备等)执行本发明各个实施例所述方法的全部或部分步骤。而前述的存储介质包括：U盘、移动硬盘、只读存储器(ROM，Read-Only Memory)、随机存取存储器(RAM，Random Access Memory)、磁碟或者光盘等各种可以存储程序代码的介质。
以上所述，仅为本发明的具体实施方式，但本发明的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本发明揭露的技术范围内，可轻易想到各种等效的修改或替换，这些修改或替换都应涵盖在本发明的保护范围之内。因此，本发明的保护范围应以权利要求的保护范围为准。

Claims (18)

  1. 一种获取光模块链路协商信息的方法，其特征在于，所述方法包括：
    获取光模块可读取的分区的信息；
    当获取的所述光模块可读取的分区的信息对应的分区，与所述光模块中存储链路协商信息的分区不同，且记录的获取光模块链路协商信息的次数未达到预设阈值时，将所述光模块可读取的分区的信息修改为所述光模块中存储链路协商信息的分区的信息；
    重新获取所述光模块可读取的分区的信息，并在获取的所述光模块可读取的分区的信息对应的分区，与所述光模块中存储链路协商信息的分区相同时，获取所述光模块的链路协商信息。
  2. 根据权利要求1所述的方法，其特征在于，在所述重新获取所述光模块可读取的分区的信息之前，所述方法还包括：
    将记录的获取光模块链路协商信息的次数加1。
  3. 根据权利要求1或2所述的方法，其特征在于，在所述重新获取所述光模块可读取的分区的信息之后，所述方法还包括：
    如果获取的所述光模块可读取的分区的信息对应的分区，与所述光模块中存储链路协商信息的分区不同，且记录的获取光模块链路协商信息的次数未达到所述预设阈值时，则再次将所述光模块可读取的分区的信息修改为所述光模块中存储链路协商信息的分区的信息，再次获取所述光模块可读取的分区的信息，并再次将记录的获取光模块链路协商信息的次数加1。
  4. 根据权利要求1-3所述的任一方法，其特征在于，所述方法还包括：
    如果获取的所述光模块可读取的分区的信息对应的分区，与所述光模块中存储链路协商信息的分区不同，且记录的获取光模块链路协商信息的次数达到所述预设阈值，则终止获取所述光模块的链路协商信息。
  5. 根据权利要求1-4所述的任一方法，其特征在于，所述方法还包括：
    当获取所述光模块可读取的分区信息失败且记录的获取光模块链路协商信息的次数未达到预设阈值时，重新获取所述光模块可读取的分区信息，并将记录的获取光模块链路协商信息的次数加1。
  6. 根据权利要求1-4所述的任一方法，其特征在于，所述方法还包括：
    当获取所述光模块可读取的分区的信息失败时，重新获取所述光模块可读取的分区的信息。
  7. 根据权利要求1-6所述的任一方法，其特征在于：
    所述光模块的链路协商信息，用于对所述光模块驱动管理过程中的链路协商；
    所述光模块的链路协商信息包括：
    连接器类型、光电参数、多模或单模、电压和发送偏移。
  8. 根据权利要求1-7所述的任一方法，其特征在于，所述方法还包括：
    通过获取所述光模块的page select byte中的控制字节对应的内容获取光模块可读取的分区的信息，所述控制字节记录的是选通的分区的信息。
  9. 一种控制芯片，其特征在于，包括控制单元和获取单元，
    所述获取单元，用于获取光模块可读取的分区的信息；
    所述控制单元，用于在所述获取单元获取的所述光模块可读取的分区的信息对应的分区，与所述光模块中存储链路协商信息的分区不同，且记录的获取光模块链路协商信息的次数未达到预设阈值时，将所述光模块可读取的分区的信息修改为所述光模块中存储链路协商信息的分区的信息；
    所述获取单元，还用于重新获取所述光模块可读取的分区的信息，并在获取的所述光模块可读取的分区的信息对应的分区，与所述光模块中存储链路协商信息的分区相同时，获取所述光模块的链路协商信息。
  10. 根据权利要求9所述的控制芯片，其特征在于，所述控制芯片还包括计数单元；
    所述计数单元用于在将所述光模块可读取的分区的信息修改为所述光模块中存储链路协商信息的分区的信息后，将记录的获取光模块信息的次数加1。
  11. 根据权利要求9或10所述的控制芯片，其特征在于，所述获取单元还用于在所述获取单元获取的所述光模块可读取的分区的信息对应的分区，与所述光模块中存储链路协商信息的分区不同，且记录的获取光模块链路协商信息的次数达到预设阈值时，终止获取所述光模块的链路协商信息。
  12. 根据权利要求9-11所述的任一控制芯片，其特征在于，所述计数单元还用于当获取所述光模块可读取的分区信息失败且记录的获取光模块链路协商信息的次数未达到预设阈值时，将记录的获取光模块链路协商信息的次数加1。
  13. 根据权利要求9-11所述的任一控制芯片，其特征在于，所述获取单元还用于当获取所述光模块可读取的分区的信息失败时，重新获取所述光模块可读取的分区的信息。
  14. 根据权利要求9-13所述的任一控制芯片，其特征在于：
    所述光模块的链路协商信息，用于对所述光模块驱动管理过程中的链路协商；
    所述光模块的链路协商信息包括：
    连接器类型、光电参数、多模或单模、电压和发送偏移。
  15. 根据权利要求9-14所述的任一控制芯片，其特征在于，所述获取单元通过获取所述光模块的page select byte中的控制字节对应的内容获取所述光模块可读取的分区的信息，所述控制字节记录的是所述光模块中选通的分区的信息。
  16. 一种控制设备，所述控制设备包括中央处理器、主存储器，其特征在于，所述控制设备还包括权利要求9-15所述的控制芯片。
  17. 一种存储设备，所述存储设备包括存储介质，其特征在于，所述存储设备还包括权利要求9-15所述的控制芯片。
  18. 一种存储系统，所述存储系统包括控制设备和存储设备，所述控制设备包括中央处理器、主存储器，所述存储设备包括存储介质，其特征在于：
    所述控制设备还包括权利要求9-15所述的控制芯片；
    所述存储设备还包括权利要求9-15所述的控制芯片。
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