CN112631973A - Hot plug control method and device for NVMe solid state disk and control mainboard - Google Patents
Hot plug control method and device for NVMe solid state disk and control mainboard Download PDFInfo
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- CN112631973A CN112631973A CN202011643491.3A CN202011643491A CN112631973A CN 112631973 A CN112631973 A CN 112631973A CN 202011643491 A CN202011643491 A CN 202011643491A CN 112631973 A CN112631973 A CN 112631973A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR 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
- G06F13/40—Bus structure
- G06F13/4063—Device-to-bus coupling
- G06F13/4068—Electrical coupling
- G06F13/4081—Live connection to bus, e.g. hot-plugging
Abstract
The invention provides a hot plug control method, a hot plug control device, a control chip and a control mainboard for an NVMe solid state disk, wherein the method comprises the following steps: when the NVMe solid state disk is plugged and unplugged, software filtering processing is carried out on the in-place signal, and after the in-place signal is confirmed to be stable, the hot plugging related register in the chip configuration space is modified, so that the PCIe driver scans or deletes the NVMe solid state disk. The invention can improve the hot plug reliability of the NVMe solid state disk.
Description
Technical Field
The invention relates to the technical field of computers, in particular to a hot plug control method and device for an NVMe solid state disk and a control mainboard.
Background
An enterprise-level NVMe (Nonvolatile Memory Express) solid state disk uses SFF-8639 as a connector. SFF-8639, also called U.2, may have a physical structure compatible with SAS/SATA/SATA Express/NVMe. The PRSNT # and IfDet # signals specified in PCIe SFF-8639Module Specification are longer than PCIe in-band signals, as opposed to the PCIe Specification long and short pin signals. In the prior art, after the NVMe solid state disk is inserted into the SFF-8639 connector, the control chip detects that an IfDet # signal of the SFF-8639 connector is pulled low, and if the IfDet # signal is reported to be interrupted to the PCIe driver immediately, the driver turns on a power supply and scans the NVMe solid state disk. Due to signal jitter, PCIe signals of the NVMe solid state disk may not be well contacted yet, which may cause that the PCIe signals of the NVMe solid state disk cannot be connected within a specified time, resulting in that the NVMe solid state disk cannot access the system. Similarly, when the NVMe hard disk is pulled out, the situation that the NVMe solid state disk is deleted without disconnecting the PCIe signal occurs. Therefore, the reliability of the NVMe solid state disk during hot plug is required to be improved.
Disclosure of Invention
In order to solve the problems, the invention provides a hot plug control method, a hot plug control device, a control chip and a control mainboard for an NVMe solid state disk, which can improve the hot plug reliability of the NVMe solid state disk.
In a first aspect, the present invention provides a hot plug control method for an NVMe solid state disk, which is applied to a hot plug control chip, and includes:
when detecting that an in-place signal jumps from a high level to a low level, carrying out software filtering processing on the in-place signal;
judging whether the in-place signal of the low level after the software filtering is stable, if so, modifying a hot plug related register in a chip configuration space to be a first state value so as to enable a PCIe driver to scan the NVMe solid state disk;
or when detecting that the in-place signal jumps from a low level to a high level, performing software filtering processing on the in-place signal;
and judging whether the in-place signal of the high level after the software filtering is stable, and if so, modifying the hot plug related register in the chip configuration space to be a second state value so that the PCIe driver deletes the NVMe solid state disk.
Optionally, the in-place signal is an in-place signal processed by a hardware filtering circuit.
Optionally, the bit signal is an IfDet # signal on the SFF-8639 connector.
In a second aspect, the present invention provides a hot plug control device for an NVMe solid state disk, which is applied to a hot plug control chip, and includes:
the software filtering module is used for carrying out software filtering processing on the in-place signal when the in-place signal is detected to jump from a high level to a low level;
the control module is used for judging whether the in-place signal of the low level after the software filtering is stable or not, and if so, modifying a hot plug related register in a chip configuration space to be a first state value so as to enable the PCIe driver to scan the NVMe solid state disk;
the software filtering module is further used for performing software filtering processing on the in-place signal when the in-place signal is detected to jump from a low level to a high level;
the control module is further configured to determine whether the in-place signal of the high level filtered by the software is stable, and if so, modify the hot plug related register in the chip configuration space to a second state value, so that the PCIe drive deletes the NVMe solid state disk.
Optionally, the in-place signal is an in-place signal processed by a hardware filtering circuit.
Optionally, the bit signal is an IfDet # signal on the SFF-8639 connector.
In a third aspect, the invention provides a hot plug control chip, which includes the hot plug control device of the NVMe solid state disk provided in the second aspect.
In a fourth aspect, the invention provides a hot plug control motherboard of an NVMe solid state disk, comprising an SFF-8639 connector, a PCIe driver, and the hot plug control chip provided in the third aspect, wherein,
the SFF-8639 connector is used for connecting the NVMe solid-state disk and outputting an in-place signal;
the hot plug control chip is connected with the SFF-8639 connector and used for carrying out software filtering processing on the in-place signal when the in-place signal is detected to jump from a high level to a low level; judging whether the in-place signal of the low level after the software filtering is stable, if so, modifying a hot plug related register in a chip configuration space to be a first state value so as to enable a PCIe driver to scan the NVMe solid state disk; or when the in-place signal is detected to jump from low level to high level, software filtering processing is carried out on the in-place signal; judging whether the in-place signal of the high level after the software filtering is stable, if so, modifying a hot plug related register in a chip configuration space to be a second state value so that the PCIe driver deletes the NVMe solid state disk;
and the PCIe driver is connected with the hot plug control chip and used for scanning or deleting the NVMe solid state disk according to the state value of the hot plug related register in the chip configuration space.
Optionally, the method further comprises:
and the hardware filtering circuit is connected between the SFF-8639 connector and the hot plug control chip and is used for performing hardware filtering processing on the in-place signal and inputting the in-place signal subjected to hardware filtering to the hot plug control chip.
Optionally, the bit signal is an IfDet # signal on the SFF-8639 connector.
According to the hot plug control method, the device, the control chip and the control mainboard for the NVMe solid state disk, when the NVMe solid state disk is inserted or pulled out, filtering can be performed by the hardware filter circuit, after the in-place signal is stable, the chip receives the in-place signal, and after the in-place signal is confirmed to be stable through software filtering, the chip configuration space is updated, so that the PCIe signal is stable when the PCIe driver scans or deletes the NVMe solid state disk. By combining software and hardware, the problem of reliability of the NVMe solid state disk during plugging and unplugging is effectively solved.
Drawings
Fig. 1 is a schematic processing flow diagram of a hot plug control method of an NVMe solid state disk to which an embodiment of the present invention is applied when the NVMe solid state disk is inserted;
fig. 2 is a schematic processing flow diagram of a hot plug control method of an NVMe solid state disk to which an embodiment of the present invention is applied when the NVMe solid state disk is pulled out;
fig. 3 is a schematic structural diagram of a hot plug control device of an NVMe solid state disk according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a control motherboard according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The embodiment of the invention provides a hot plug control method of an NVMe solid state disk, which is applied to a hot plug control chip. Due to the fact that the NVMe solid-state disk is inserted and the NVMe solid-state disk is pulled out, the states of corresponding bit signals are different, and therefore the states need to be discussed separately.
The processing flow of inserting the NVMe solid state disk can refer to fig. 1. Corresponding to a scene of inserting an NVMe solid state disk, the control method provided by the embodiment of the invention comprises the following steps:
and step 101, when the situation that the in-place signal jumps from a high level to a low level is detected, performing software filtering processing on the in-place signal.
And step 102, judging whether the in-place signal of the low level filtered by the software is stable, and if so, modifying a hot plug related register in a chip configuration space to be a first state value so as to enable the PCIe driver to scan the NVMe solid state disk.
In the embodiment of the invention, the bit signal is an IfDet # signal on an SFF-8639 connector. NVMe solid state disk is inserted into the SFF-8639 connector, and the IfDet # signal is pulled low. And the control chip receives the IfDet #, and performs software filtering on the IfDet # through a filtering algorithm. Further, the bit signal IfDet # may be subjected to a hardware filtering process before being input to the chip.
After the control chip confirms that the IfDet # signal of the low level is stable, the chip firmware modifies the hot plug related register in the chip configuration space to be a first state value, so that the PCIe driver scans the NVMe solid state disk.
Fig. 2 may be referred to in a process flow of pulling out the NVMe solid state disk. Corresponding to a scene of pulling out an NVMe solid state disk, the control method provided by the embodiment of the invention comprises the following steps:
step 201, when detecting that the in-place signal jumps from low level to high level, performing software filtering processing on the in-place signal.
Step 202, judging whether the high-level in-place signal after software filtering is stable, and if so, modifying a hot plug related register in a chip configuration space to be a second state value so that the PCIe drive deletes the NVMe solid state disk.
In the embodiment of the invention, the bit signal is an IfDet # signal on an SFF-8639 connector. The NVMe solid state disk pulls out the SFF-8639 connector, and the IfDet # signal is pulled high. And the control chip receives the IfDet #, and performs software filtering on the IfDet # through a filtering algorithm. Further, the bit signal IfDet # may be subjected to a hardware filtering process before being input to the chip.
And after the control chip confirms that the high-level IfDet # signal is stable, the chip firmware modifies the hot plug related register in the chip configuration space to be a second state value, so that the PCIe driver deletes the NVMe solid state disk.
According to the hot plug control method of the NVMe solid state disk provided by the embodiment of the invention, when the NVMe solid state disk is inserted or pulled out, filtering can be performed by the hardware filter circuit, the in-place signal is stable and then enters the hot plug control chip, and the hot plug control chip updates the chip configuration space after confirming that the in-place signal is stable through software filtering, so that a PCIe signal is stable when a PCIe driver scans or deletes the NVMe solid state disk. By combining software and hardware, the problem of reliability of the NVMe solid state disk during plugging and unplugging is effectively solved.
Fig. 3 shows a schematic structural diagram of a hot plug control device of an NVMe solid state disk according to an embodiment of the present invention. As shown in fig. 3, an embodiment of the present invention provides a hot plug control device for an NVMe solid state disk, where the device includes: a software filtering module 301 and a control module 302, wherein,
a software filtering module 301, configured to perform software filtering processing on an in-place signal when it is detected that the in-place signal jumps from a high level to a low level;
the control module 302 is configured to determine whether the low-level in-place signal after the software filtering is stable, and if so, modify a hot plug related register in a chip configuration space to a first state value, so that the PCIe drive scans the NVMe solid state disk;
the software filtering module 301 is further configured to perform software filtering processing on the in-place signal when it is detected that the in-place signal jumps from a low level to a high level;
the control module 302 is further configured to determine whether the in-place signal of the high level after the software filtering is stable, and if so, modify the hot plug related register in the chip configuration space to a second state value, so that the PCIe drive deletes the NVMe solid state disk.
Specifically, in the embodiment of the invention, the bit signal is an IfDet # signal on the SFF-8639 connector. Before the bit signal IfDet # is input to the chip, the bit signal IfDet # may be subjected to hardware filtering.
The hot plug control device for the NVMe solid state disk provided in the embodiment of the present invention is used for executing the above method embodiment, and for the specific flow and the detailed content, reference is made to the above embodiment, which is not described herein again.
Based on the hot plug control device of the NVMe solid state disk provided by the embodiment, the embodiment of the invention also provides a hot plug control chip, which comprises the hot plug control device of the NVMe solid state disk.
Further, an embodiment of the present invention further provides a hot plug control motherboard 400 of the NVMe solid state disk, and fig. 4 is a schematic structural diagram of the control motherboard 400 provided in the embodiment of the present invention. As shown in fig. 4, the control board 400 may include: the system comprises an SFF-8639 connector 401, a hot-plug control chip 403 and a PCIe driver 404, wherein the SFF-8639 connector 401 is used for connecting the NVMe solid state disk and outputting a bit signal.
The hot plug control chip 403 stores firmware in the chip, and may execute program instructions to implement the hot plug control method for the NVMe solid state disk provided in the foregoing embodiments, for example, the method includes: when detecting that the in-place signal jumps from a high level to a low level, carrying out software filtering processing on the in-place signal; judging whether the in-place signal of the low level after the software filtering is stable, if so, modifying a hot plug related register in a chip configuration space to be a first state value so as to enable a PCIe driver to scan the NVMe solid state disk; or when the in-place signal is detected to jump from low level to high level, software filtering processing is carried out on the in-place signal; and judging whether the in-place signal of the high level after the software filtering is stable, and if so, modifying the hot plug related register in the chip configuration space to be a second state value so that the PCIe driver deletes the NVMe solid state disk.
And the PCIe driver 404 is connected to the hot-plug control chip 403, and configured to scan or delete the NVMe solid state disk according to the state value of the hot-plug related register in the chip configuration space.
Further, a hardware filtering circuit 402 may be disposed on the control motherboard, and connected between the SFF-8639 connector and the hot plug control chip, and configured to perform hardware filtering processing on the in-place signal, and input the in-place signal after the hardware filtering to the hot plug control chip 403. The bit signal used in this embodiment is the IfDet # signal on the SFF-8639 connector. It should be noted that the hardware filter circuit 402 may be disposed outside the hot plug control chip 403, or may be disposed inside the hot plug control chip.
According to the hot plug control mainboard for the NVMe solid state disk, when the NVMe solid state disk is inserted or pulled out, filtering can be performed by the hardware filter circuit, after the in-place signal is stable, the chip receives the in-place signal, and after the in-place signal is confirmed to be stable through software filtering, the chip configuration space is updated, so that the PCIe signal is stable when the PCIe driver scans or deletes the NVMe solid state disk. By combining software and hardware, the problem of reliability of the NVMe solid state disk during plugging and unplugging is effectively solved.
The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. With this understanding in mind, the above-described technical solutions may be embodied in the form of a software product, which can be stored in a computer-readable storage medium such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods described in the embodiments or some parts of the embodiments.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A hot plug control method of an NVMe solid state disk is applied to a hot plug control chip and is characterized by comprising the following steps:
when detecting that an in-place signal jumps from a high level to a low level, carrying out software filtering processing on the in-place signal;
judging whether the in-place signal of the low level after the software filtering is stable, if so, modifying a hot plug related register in a chip configuration space to be a first state value so as to enable a PCIe driver to scan the NVMe solid state disk;
or when detecting that the in-place signal jumps from a low level to a high level, performing software filtering processing on the in-place signal;
and judging whether the in-place signal of the high level after the software filtering is stable, and if so, modifying the hot plug related register in the chip configuration space to be a second state value so that the PCIe driver deletes the NVMe solid state disk.
2. The method of claim 1, wherein the in-place signal is a hardware filter circuit processed in-place signal.
3. The method of claim 1 or 2, wherein the in-place signal is an IfDet # signal on an SFF-8639 connector.
4. The utility model provides a hot plug controlling means of NVMe solid state hard drives, is applied to hot plug control chip, its characterized in that includes:
the software filtering module is used for carrying out software filtering processing on the in-place signal when the in-place signal is detected to jump from a high level to a low level;
the control module is used for judging whether the in-place signal of the low level after the software filtering is stable or not, and if so, modifying a hot plug related register in a chip configuration space to be a first state value so as to enable the PCIe driver to scan the NVMe solid state disk;
the software filtering module is further used for performing software filtering processing on the in-place signal when the in-place signal is detected to jump from a low level to a high level;
the control module is further configured to determine whether the in-place signal of the high level filtered by the software is stable, and if so, modify the hot plug related register in the chip configuration space to a second state value, so that the PCIe drive deletes the NVMe solid state disk.
5. The apparatus of claim 4, wherein the in-place signal is a processed in-place signal of a hardware filter circuit.
6. The apparatus of claim 4 or 5, wherein the bit signal is an IfDet # signal on an SFF-8639 connector.
7. A hot plug control chip is characterized by comprising the hot plug control device of the NVMe solid state disk of any one of claims 4-6.
8. A hot plug control mainboard of an NVMe solid state disk is characterized by comprising an SFF-8639 connector, a hot plug control chip and a PCIe driver, wherein,
the SFF-8639 connector is used for connecting the NVMe solid-state disk and outputting an in-place signal;
the hot plug control chip is connected with the SFF-8639 connector and used for carrying out software filtering processing on the in-place signal when the in-place signal is detected to jump from a high level to a low level; judging whether the in-place signal of the low level after the software filtering is stable, if so, modifying a hot plug related register in a chip configuration space to be a first state value so as to enable a PCIe driver to scan the NVMe solid state disk; or when the in-place signal is detected to jump from low level to high level, software filtering processing is carried out on the in-place signal; judging whether the in-place signal of the high level after the software filtering is stable, if so, modifying a hot plug related register in a chip configuration space to be a second state value so that the PCIe driver deletes the NVMe solid state disk;
and the PCIe driver is connected with the hot plug control chip and used for scanning or deleting the NVMe solid state disk according to the state value of the hot plug related register in the chip configuration space.
9. The NVMe solid state disk hot plug control mainboard of claim 8, further comprising:
and the hardware filtering circuit is connected between the SFF-8639 connector and the hot plug control chip and is used for performing hardware filtering processing on the in-place signal and inputting the in-place signal subjected to hardware filtering to the hot plug control chip.
10. The hot plug control mainboard of NVMe solid state disk of claim 8 or 9, wherein the in-place signal is an IfDet # signal on an SFF-8639 connector.
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| CN202011643491.3A CN112631973A (en) | 2020-12-30 | 2020-12-30 | Hot plug control method and device for NVMe solid state disk and control mainboard |
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| CN202011643491.3A CN112631973A (en) | 2020-12-30 | 2020-12-30 | Hot plug control method and device for NVMe solid state disk and control mainboard |
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| CN113448416A (en) * | 2021-06-04 | 2021-09-28 | 山东英信计算机技术有限公司 | Hot plug stabilizing equipment and computer |
| CN114415939A (en) * | 2021-12-16 | 2022-04-29 | 中科可控信息产业有限公司 | Hard disk control method, hard disk control device, computer equipment, storage medium and program product |
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