CN111984568B - Method and system for PHY port polarity self-adaption of SAS controller - Google Patents
Method and system for PHY port polarity self-adaption of SAS controller Download PDFInfo
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Abstract
The invention provides a method and a system for self-adapting the PHY port polarity of an SAS controller, wherein the method comprises the following steps: reading polarity configuration information of a PHY port of the SAS controller; initiating a link training operation to a port of downlink equipment according to the acquired polarity configuration information; judging the port link state of the downlink equipment according to the result of reading the link training; if the port link of the downlink device is in an activated state, the polarity of the PHY port is maintained and the polarity flag of the PHY port is set as a default value. If the port link of the downlink equipment is in a forbidden state, setting the polarity inversion of a PHY port of the downlink equipment; reinitiating link training operation; if the port link of the downlink device is in an activated state, the polarity of the PHY port is maintained and the polarity flag of the PHY port is set to be a counter-selection value. The time of adaptation and test of developers is saved, the product development period is shortened, and the product competitiveness is improved.
Description
Technical Field
The invention relates to the technical field of hard disk communication link design, in particular to a method and a system for polarity self-adaption of a PHY (physical layer) port of an SAS (serial attached SCSI) controller.
Background
In the field of cloud computing data centers, with the development of internet technology, network data is increased sharply, requirements for network storage are higher and higher, and expansion and management of hard disks are realized by matching SAS controllers based on SAS protocols with expanders. The SAS (Serial Attached SCSI) has the highest interface rate in the current disk channel technology, and by adopting a channel merging technology, the SAS supports that multiple PHYs (Port physical Layer, which may be referred to as Port physical Layer in chinese, which is a common abbreviation for OSI model physical Layer) are merged into one Port, which can provide channel bandwidth up to dozens of G, for example, a commonly used 4 × SAS wide Port, and the bandwidth can reach 12Gbit/s; the SAS switching framework supports the expansion of a plurality of devices, one SAS domain can theoretically connect 16128 devices at most, and meanwhile, the SAS device supports 24 x 7 multi-thread design and can meet multi-task application; the SAS equipment is based on the most mature SCSI technology in the current storage field, and can be compatible with SATA, so that the SAS channel technology has wide application range and good compatibility.
Currently, there are many SAS cards for hard disk expansion, and different manufacturers and models have different PHY numbers and PHY polarities. At present, the polarities of physical PHY ports TX and RX of a plurality of pm80xx series SAS-based self-research cards are inconsistent with those of other SAS cards, the polarities of TX and RX of PHY ports of some storage machines are onboard SAS expansion slots, so that whether the polarities of physical PHYs are consistent or not needs to be confirmed firstly when product development is carried out every time, adaptation is needed to be carried out when the polarities of the PHYs are inconsistent, the consistency of the polarities of the PHYs is achieved by modifying the polarity of a logic PHY, although the problem is solved, a large amount of manpower resources are consumed, a plurality of drive versions need to be maintained, and development and nursing cost is increased.
Disclosure of Invention
The invention provides a method and a system for self-adapting PHY port polarity of an SAS controller, aiming at the problems that in the prior art, although the problem of consistent PHY polarity is solved, a large amount of human resources are consumed, a plurality of driving versions need to be maintained, and the development and nursing cost is increased.
The technical scheme of the invention is as follows:
in one aspect, the technical solution of the present invention provides a method for polarity adaptation of a PHY port of an SAS controller, which is applied to an adaptive system, where the system includes the SAS controller and a downstream device connected to the SAS controller, and the method includes the following steps:
reading polarity configuration information of a PHY port of the SAS controller;
initiating a link training operation to a port of the downlink equipment according to the acquired polarity configuration information;
reading a link training result after the link training is finished;
judging the port link state of the downlink equipment according to the result of reading the link training;
and if the port link of the downlink equipment is in an activated state, the link between the SAS controller and the downlink equipment is considered to be in a connected state, the polarity of the PHY port is maintained, and the polarity mark of the PHY port is set as a default value.
Further, the step of performing adaptive setting of the polarity of the PHY port according to the determination result further includes:
if the port link of the downlink equipment is in a forbidden state, setting the polarity inversion of a PHY port of the downlink equipment;
reinitiating link training operation and judging according to the result of the link training;
and if the port link of the downlink equipment is in an activated state, the link between the SAS controller and the downlink equipment is considered to be in a connected state, the polarity of the PHY port is maintained, and the polarity flag of the PHY port is set as a reverse selection value. The confirmation of PHY polarity is conveniently done.
Further, the step of reinitiating the link training operation and determining according to the result of the link training further includes:
and after the link training operation with the set threshold times is initiated again, if the port link of the downlink equipment is in a disabled state, quitting the loading of the drive and outputting prompt information.
Further, the method further comprises:
storing the polarity mark of the PHY port into the EEPROM;
when the system is electrified and started again, the polarity mark of the PHY port stored in the EEPROM is read for setting, and the confirmation of the PHY polarity is completed.
Further, the step of reading the polarity configuration information of the PHY port of the SAS controller may comprise:
reading PHY port information and downlink equipment port information of the SAS controller;
and determining the PHY port ID to be subjected to polarity self-adaptation according to the read port information. The PHY port requiring polarity adaptation is determined.
Further, the step of reading the polarity configuration information of the PHY port of the SAS controller includes:
and reading the polarity configuration information of the corresponding PHY port saved in the EEPROM according to the ID of the PHY port. And the subsequent self-adaptive setting is convenient according to the polarity configuration information.
Further, the step of reading the PHY port information and the downstream device port information of the SAS controller further includes:
enabling a PCIe device;
setting the PCIe device as a master device; the primary device is connected with the SAS controller.
On the other hand, the technical scheme of the invention also provides a system for polarity self-adaptation of a PHY port of the SAS controller, which comprises PCIe equipment, wherein the PCIe equipment comprises main equipment and a plurality of downlink equipment, and the main equipment is connected with the downlink equipment through the SAS controller;
the system also comprises a polarity configuration information reading module, a link training module, a training result reading module, a judging module and a self-adaptive setting module;
the polarity configuration information reading module is used for reading the polarity configuration information of the PHY port of the SAS controller;
the link training module is used for initiating link training operation to a port of the downlink equipment according to the polarity configuration information;
the training result reading module is used for reading the link training result output by the link training module after the link training is finished;
the judging module is used for judging the port link state of the downlink equipment according to the result of the read link training;
the self-adaptive setting module comprises a holding setting unit;
and the keeping setting unit is used for considering that the link between the SAS controller and the downlink equipment is in a communication state if the port link of the downlink equipment output by the judging module is in an activated state, keeping the polarity of the PHY port and setting the polarity mark of the PHY port as a default value.
Furthermore, the self-adaptive setting module also comprises a reverse setting unit;
the reverse setting unit is used for setting the polarity reverse of the PHY port of the downlink equipment if the port link of the downlink equipment output by the judging module is in a forbidden state;
the link training module is also used for reinitiating the link training operation;
and the holding setting unit is further configured to, if the port link of the output downlink device is in an activated state after the determination module determines the training result of the reinitiated link training, consider that the link between the SAS controller and the downlink device is in a connected state, hold the polarity of the PHY port, and set the polarity flag of the PHY port to a deselected value.
Furthermore, the system also comprises a prompt message output module;
and the prompt information output module is used for quitting the loading of the driver and outputting prompt information if the port link of the downlink equipment is in a forbidden state after the link training operation of the set threshold times is initiated again.
Further, the system also comprises an EEPROM;
the maintaining and setting unit is also used for storing the polarity mark of the PHY port into the EEPROM;
and the configuration information reading module is used for reading the polarity mark of the PHY port stored in the EEPROM when the system is electrified and started again.
Further, the system also comprises an information reading module and a determining module;
the information reading module is used for reading PHY port information and downlink equipment port information of the SAS controller;
the determining module is used for determining the PHY port ID to be subjected to polarity self-adaptation according to the read port information;
and the configuration information reading module is specifically used for reading the polarity configuration information of the corresponding PHY port stored in the EEPROM according to the ID of the PHY port.
According to the technical scheme, the invention has the following advantages: the problem that different models of machines use SAS cards with different PHY polarities and need to be adapted in advance is solved, the adaptation and testing time of developers is saved, the product development period is shortened, and the product competitiveness is improved.
In addition, the invention has reliable design principle, simple structure and very wide application prospect.
Therefore, compared with the prior art, the invention has prominent substantive features and remarkable progress, and the beneficial effects of the implementation are also obvious.
Drawings
In order to more clearly illustrate the embodiments or prior art solutions of the present invention, the drawings used in the description of the embodiments or prior art will be briefly described below, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic flow diagram of a method of one embodiment of the invention.
FIG. 2 is a schematic block diagram of a system of one embodiment of the present invention.
Detailed Description
In order to make those skilled in the art better understand the technical solutions of the present invention, 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.
As shown in fig. 1, an embodiment of the present invention provides a method for polarity adaptation of a PHY port of an SAS controller, which is applied to an adaptive system, where the system includes the SAS controller and a downstream device connected to the SAS controller, and the method includes the following steps:
s1: reading polarity configuration information of a PHY port of the SAS controller;
s2: initiating a link training operation to a port of the downlink equipment according to the acquired polarity configuration information;
s3: reading a link training result after the link training is finished;
s4: judging the port link state of the downlink equipment according to the result of reading the link training;
s5: and if the port link of the downlink equipment is in an activated state, the link between the SAS controller and the downlink equipment is considered to be in a connected state, the polarity of the PHY port is maintained, and the polarity mark of the PHY port is set as a default value.
In some embodiments, the method further comprises S6, and the specific step S6 includes:
s61: if the port link of the downlink equipment is in a forbidden state, setting the polarity inversion of a PHY port of the downlink equipment;
s62: reinitiating link training operation and judging according to the result of the link training;
s63: if the port link of the downstream device is in an activated state, the link between the SAS controller and the downstream device is considered to be in a connected state, the polarity of the PHY port is maintained, and the polarity flag of the PHY port is set to be a reverse selection value. The confirmation of PHY polarity is conveniently done.
In some embodiments, in step S62, the step of reinitiating the link training operation and making a determination according to the result of the link training further includes:
and after the link training operation with the set threshold times is initiated again, if the port link of the downlink equipment is in a disabled state, quitting the loading of the drive and outputting prompt information.
In some embodiments, the method further comprises:
storing the polarity mark of the PHY port into the EEPROM;
when the system is electrified and started again, the polarity mark of the PHY port stored in the EEPROM is read for setting, and the confirmation of the PHY polarity is completed.
It is further noted that the step of reading the polarity configuration information of the PHY port of the SAS controller may be preceded by the steps of:
enabling a PCIe device;
setting the PCIe device as a master device; the main equipment is connected with the SAS controller;
reading PHY port information and downstream equipment port information of the SAS controller;
and determining the PHY port ID to be subjected to polarity self-adaptation according to the read port information. The PHY port requiring polarity adaptation is determined.
In some embodiments, reading the polarity configuration information of the SAS controller PHY port includes:
and reading the polarity configuration information of the corresponding PHY port saved in the EEPROM according to the ID of the PHY port. And the subsequent self-adaptive setting is convenient according to the polarity configuration information.
It should be noted that each PHY has physical Tx and Rx, referred to herein as its polarity. Each PHY has a SAS address and a unique identifier. When the PHY polarity of the SAS card is not identical to the PHY polarity of the expansion board or the hard disk, communication with the hard disk may be disabled. By changing the logical Tx and Rx directions of different PHY ports, the PHY polarity of the SAS can be consistent with that of the connected device.
The specific PHY polarity adaptation flow is as follows:
(1) Configuring and setting equipment, specifically comprising: enabling a PCIe device; setting the current PCIe device as a master device; setting a pci slot bus master by setting a pci command register;
(2) Reading the information of a PHY port and a downlink device port of the SAS controller, and determining a PHY ID needing polarity self-adaptation;
(3) Firstly, initiating a link training operation to a port of downlink equipment according to default PHY polarity configuration information, reading a link training result, if a port link of the downlink equipment is in an active state, considering that a link between an SAS controller and the downlink equipment is in a connected state, keeping the polarity of a PHY port and setting a polarity flag of the PHY port as a default value default.
(4) If the port link of the downlink equipment is in the disabled state De-active after the link training in the step (3), setting the polarity inversion l of the PHY port of the downlink equipment, then restarting the link training operation, reading the result of the link training after the link training is finished, and if the link of the port of the downlink equipment is in the activated state active, indicating that the link between the SAS controller and the downlink equipment is in a connected state, keeping the polarity of the PHY port, and setting a PHY polarity flag as a reverse value invert;
(5) And (4) if the link state is the disabled state De-active after the link training operation in the steps (3) and (4), repeating the steps (3) and (4), if the link training operation is not successful for three times, printing the log, and exiting the driving process.
(6) And (5) the step (5) is unsuccessful after three times, which indicates that the SAS controller has other hardware problems, and in this case, the loading of the driver needs to be quitted, so that a developer is prompted to continuously check whether other problems possibly causing link connection exist.
(7) And (4) successfully executing the step (3) or the step (4), storing the PHY polarity mark into the EEPROM, reading the PHY polarity mark stored in the EEPROM to set the PHY polarity mark when the system is powered on again next time, and repeating the steps (3) and (4) to finish the confirmation of the PHY polarity.
SAS cards with different PHY polarities can be automatically adapted by using the same drive, and the problem that different models of machines using SAS cards with different PHY polarities need to be adapted in advance is solved.
As shown in fig. 2, the technical solution of the present invention further provides a system for polarity adaptation of a PHY port of an SAS controller, including a PCIe device, where the PCIe device includes a main device and a plurality of downstream devices, and the main device is connected to the downstream devices through the SAS controller;
the system also comprises a polarity configuration information reading module, a link training module, a judging module and a self-adaptive setting module;
the polarity configuration information reading module is used for reading the polarity configuration information of the PHY port of the SAS controller;
the link training module is used for initiating link training operation to a port of the downlink equipment according to the polarity configuration information;
the training result reading module is used for reading the link training result output by the link training module after the link training is finished;
the judging module is used for judging the port link state of the downlink equipment according to the result of reading the link training;
the self-adaptive setting module comprises a holding setting unit;
and the holding setting unit is used for considering that a link between the SAS controller and the downlink equipment is in a communication state if the port link of the downlink equipment output by the judging module is in an activated state, holding the polarity of the PHY port and setting the polarity flag of the PHY port as a default value.
In some embodiments, the adaptive setting module further comprises a reverse setting unit;
the reverse setting unit is used for setting the polarity reverse of the PHY port of the downlink equipment if the port link of the downlink equipment output by the judging module is in a forbidden state;
the link training module is also used for reinitiating link training operation;
and the holding setting unit is also used for considering that the link between the SAS controller and the downlink equipment is in a connected state if the port link of the downlink equipment is in an activated state after the judgment module judges the training result of the reinitiated link training, maintaining the polarity of the PHY port and setting the polarity flag of the PHY port as a reverse selection value.
In some embodiments, the system further comprises a prompt message output module;
and the prompt information output module is used for quitting the loading of the driver and outputting prompt information if the port link of the downlink equipment is in a forbidden state after the link training operation of the set threshold times is initiated again.
In some embodiments, the system further comprises an EEPROM;
the maintaining and setting unit is also used for storing the polarity mark of the PHY port into the EEPROM;
and the configuration information reading module is used for reading the polarity mark of the PHY port stored in the EEPROM when the system is electrified and started again.
In some embodiments, the system further comprises an information reading module and a determining module;
the information reading module is used for reading PHY port information and downlink equipment port information of the SAS controller;
the determining module is used for determining the PHY port ID to be subjected to polarity self-adaptation according to the read port information;
and the configuration information reading module is specifically used for reading the polarity configuration information of the corresponding PHY port stored in the EEPROM according to the ID of the PHY port.
Although the present invention has been described in detail by referring to the drawings in connection with the preferred embodiments, the present invention is not limited thereto. Various equivalent modifications or substitutions can be made on the embodiments of the present invention by those skilled in the art without departing from the spirit and scope of the present invention, and these modifications or substitutions should be within the scope of the present invention/any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present disclosure and 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 (8)
1. A method for PHY port polarity adaptation of an SAS controller is applied to an adaptive system, the system comprises the SAS controller and downstream equipment connected with the SAS controller, physical Tx and Rx of each PHY port are called as polarities, and the method comprises the following steps:
reading polarity configuration information of a PHY port of the SAS controller;
initiating a link training operation to a port of the downlink equipment according to the acquired polarity configuration information;
reading a link training result after the link training is finished;
judging the port link state of the downlink equipment according to the result of reading the link training;
if the port link of the downlink equipment is in an activated state, the link between the SAS controller and the downlink equipment is considered to be in a communicated state, the polarity of the PHY port is kept, and the polarity flag of the PHY port is set as a default value;
if the port link of the downlink equipment is in a forbidden state, setting the polarity inversion of a PHY port of the downlink equipment;
reinitiating link training operation and judging according to the result of the link training;
if the port link of the downstream device is in an activated state, the link between the SAS controller and the downstream device is considered to be in a connected state, the polarity of the PHY port is maintained, and the polarity flag of the PHY port is set to be a reverse selection value.
2. The method of claim 1, wherein the step of reinitiating the link training operation and determining based on the result of the link training further comprises:
and after the link training operation with the set threshold times is initiated again, if the port link of the downlink equipment is in a disabled state, quitting the loading of the drive and outputting prompt information.
3. The method of claim 1, wherein the method further comprises:
storing the polarity mark of the PHY port into the EEPROM;
when the system is electrified and started again, the polarity mark of the PHY port stored in the EEPROM is read for setting, and the confirmation of the PHY polarity is completed.
4. The method of claim 3, wherein reading the polarity configuration information of the SAS controller PHY port is preceded by the step of:
reading PHY port information and downstream equipment port information of the SAS controller;
and determining the PHY port ID to be subjected to polarity self-adaptation according to the read port information.
5. The method of claim 4, wherein reading the polarity configuration information of the SAS controller PHY port comprises:
and reading the polarity configuration information of the corresponding PHY port saved in the EEPROM according to the ID of the PHY port.
6. A polarity self-adaptive system of a PHY port of an SAS controller is characterized by comprising PCIe equipment, wherein the PCIe equipment comprises main equipment and a plurality of downlink equipment, and the main equipment is connected with the downlink equipment through the SAS controller; the physical Tx and Rx of each PHY port is called polarity; the system also comprises a polarity configuration information reading module, a link training module, a training result reading module, a judging module and a self-adaptive setting module;
the polarity configuration information reading module is used for reading the polarity configuration information of the PHY port of the SAS controller;
the link training module is used for initiating link training operation to a port of the downlink equipment according to the polarity configuration information;
the training result reading module is used for reading the link training result output by the link training module after the link training is finished;
the judging module is used for judging the port link state of the downlink equipment according to the result of the read link training;
the self-adaptive setting module comprises a holding setting unit;
a hold setting unit, configured to, if the port link of the downstream device output by the determination module is in an activated state, consider that the link between the SAS controller and the downstream device is in a connected state, hold the polarity of the PHY port, and set the polarity flag of the PHY port to a default value;
the self-adaptive setting module also comprises a reverse setting unit;
the reverse setting unit is used for setting the polarity reverse of the PHY port of the downlink equipment if the port link of the downlink equipment output by the judging module is in a forbidden state;
the link training module is also used for reinitiating the link training operation;
and the holding setting unit is also used for considering that the link between the SAS controller and the downlink equipment is in a connected state if the port link of the downlink equipment is in an activated state after the judgment module judges the training result of the reinitiated link training, maintaining the polarity of the PHY port and setting the polarity flag of the PHY port as a reverse selection value.
7. The SAS controller PHY port polarity adaptive system of claim 6, further comprising a hint information output module;
and the prompt information output module is used for quitting the loading of the driver and outputting prompt information if the port link of the downlink equipment is in a forbidden state after the link training operation of the set threshold times is initiated again.
8. The SAS controller PHY port polarity adaptive system of claim 6, further comprising an EEPROM;
the maintaining and setting unit is also used for storing the polarity mark of the PHY port into the EEPROM;
and the configuration information reading module is used for reading the polarity mark of the PHY port stored in the EEPROM when the system is electrified and started again.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102693201A (en) * | 2011-02-07 | 2012-09-26 | Lsi公司 | SAS controller with persistent port configuration |
| CN107993430A (en) * | 2017-12-05 | 2018-05-04 | 积成电子股份有限公司 | A kind of method for improving concentrator Ethernet PHY chip stability |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102693201A (en) * | 2011-02-07 | 2012-09-26 | Lsi公司 | SAS controller with persistent port configuration |
| CN107993430A (en) * | 2017-12-05 | 2018-05-04 | 积成电子股份有限公司 | A kind of method for improving concentrator Ethernet PHY chip stability |
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