JP2536408B2 - Data transfer device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data transfer apparatus for connecting different types of devices for controlling data transfer between information processing apparatuses using an optical transmission line.

[0002]

2. Description of the Related Art Conventionally, a channel processing device has been proposed in Japanese Patent Application Laid-Open No. 1-30170 as one of data transfer devices of this type. In this channel processing device, in order to absorb the transfer protocols and transfer speeds diversified between the channel device and the input / output device, the input / output processing device is provided with a control information transmission accessible from both the channel path control unit and the channel unit. A buffer storage is provided for each channel device, and the interface between the channel device and the input / output device is unified and controlled.

However, such a channel processing device does not have a configuration in which an optical transmission line is specially conscious, and is an input / output device that supports exactly the same function with different protocols, that is, operating software of different design concepts (hereinafter referred to as operating software). OS controlled by S370SN, for example
There is no consideration for sharing the A-compatible device and the UNIX system device in one data transfer device of the same system.

[0004]

In recent years, with the increase in the scale of the system, user demands on the data transfer device have increased demands not only on the basic transfer performance but also on the performance such as connectivity, openness, operability, and expandability. Is coming. Also, due to the downsizing trend, integration of large-scale general-purpose machines and systems that cross the boundaries of workstations (WS) has become more common. At this time, the input / output device wants to move the work unit from the general-purpose machine to the WS as it is, but wants to connect different devices at the time of migration, or to connect those devices to share the work between different devices. Is increasing.

When there is such a system request, it is difficult for the conventional data transfer device to cope with it in two respects. First, it is impossible to open the physical interface. Since the conventional data transfer device only supports at most several types of protocols that are predetermined by the type of OS, the number of design man-hours is the same as that of redesign to connect the input / output device that has not been considered in the initial design. However, there have been drawbacks such as high cost, poor performance and expandability due to the fact that functions are often implemented with additional devices such as adapters, and poor transfer performance. Moreover, the optical transmission line peripheral circuit may not be open-oriented. Since the optical transmission line is serial transfer and data is transmitted and received bit by bit, the Fiber is physically an interface of a large-scale loop type local area network.
Destributed Data Interface
Many of them are advocating open systems because they are compliant with e (FDDI). In an information processing system including a data transfer device, since all data is processed in parallel, a large-scale buffer is required at both ends, and the processing unit of the data on the buffer is between the data transfer devices of different OSs having different processing methods. Or, there is a drawback in that it cannot be used logically because it is physically connected because the optical adapters are not unified.

Secondly, there is a problem that the interface with the OS is not unified and the input / output device having incompatible channel programs cannot be controlled. The channel program itself is a collection of command sequences, but in order to manage devices with completely different timings when they are executed by different OSs, it is necessary to prefetch the entire channel program and a dedicated protocol absorption function in the channel section. However, the conventional data transfer device does not have such a function, so that it has a drawback in that the heterogeneous device cannot be completely controlled.

[0007]

A first data transfer method of the present invention.
The transmission device includes a serial transmission line and one of the serial transmission lines.
At least one channel unit connected to the end;
Connected to the other end of the serial transmission line
With two different parallel I / O protocols
Multiple remote channel units connected to output devices
In a data transfer device including
The channel unit side of the transmission path and the remote channel
A delimiter indicating the data width is added to the data on both sides of the channel.
Frame to configure the frame and
A means for transmitting to a real transmission line and the serial transmission line
And receives the delimiter and indicates the delimiter.
Determine the data width of the frame according to the data width
Means for controlling the channel unit and the channel unit.
Number of channel units through the serial transmission line
The director device is connected and this director device
How much serial data is given through the serial transmission line
Switch selection to select whether to give to each channel unit
Means and the bus selection route of this switch selection means
And a control table for controlling.

A second data transfer device of the present invention is the above-mentioned first data transfer device .
No. 1 data transfer device, which is installed in the channel controller.
Access from icro program control circuit and channel device
To local and main memory where possible and share resources
Memory access circuit and microprogram
I / O from the central processing unit
Channel program in local memory according to the instruction start
Preemption / decoding / checking / data range on memory
Address translation and checking of position, prefetching part of data
・ Check, channel device ・ Remote channel configuration system
Different I / O due to control / error control
I / O device with protocol and OS interface
Devices can be shared logically within one data transfer device
Configured to do.

A third data transfer device of the present invention is the above-mentioned first data transfer device .
No. 2 data transfer device,
Means for storing a plurality of specific address ranges designated by S
(Hereafter, fixed address access table) is provided, and OS and book
Channel protocol for each I / O is defined as a rule between data transfer devices.
By setting the gram area and performing I / O control,
Configured to enable simple and high-speed lessing process
It is.

A fourth data transfer apparatus of the present invention is the above-mentioned first data transfer apparatus .
No. 2 data transfer device,
Read the data area of the channel program specified by S
A means for storing from the in-memory is provided, and the OS and this data
Channel for each I / O device as a rule between transfer devices
At the same time as modifying the program address,
Different I / O data can be obtained by pre-reading the program.
To enable improvement of control performance when controlling the vice
Composed.

A fifth data transfer device of the present invention is the above-mentioned first data transfer device .
A data transfer device according to item 2, which is provided in the channel control device.
Channel program of other device specified by OS
By providing a means to acquire data from other devices,
I / O device is defined as a protocol between the OS and this data transfer device.
Load channel program from other device
To control different I / O devices.
It is composed.

Further, the sixth data transfer apparatus of the present invention on
The above-mentioned second data transfer device, which is a channel control device
I / O device commands with different specifications are sorted by function
And a data transfer device for the OS
As a rule between the discs, the type of disc or MT
Instruct the channel program and channel with this data transfer device
The commands in the program were converted one after another and actually changed
Device controlled by protocol command from OS
Designed so that it can be handled as one device
Is made.

[0013]

[0014]

[0015]

An embodiment of the present invention will now be described in detail with reference to the drawings.

In the drawings, the same reference numerals indicate the same elements even if the drawings are different.

Referring to FIG. 1, one embodiment of the present invention is
A data transfer device that is connected to the main memory 1 and includes a channel control device 2 and channels 31 to 3n, and is different from the remote channels 41 to 4n by being connected by a common optical transmission line 61 to 6n which is a serial transmission line. The input / output (I / O) device groups 51 to 5n having the above protocol are controlled to exchange data with the main memory 1. A micro program control circuit 311 is included in each of the channels 31 to 3n.
To 31n, data buffers 321 to 32n, frame buffers 331 to 33n, serial-parallel conversion circuit 34
1 to 34n and arithmetic circuits 351 to 35n. In the remote channels 41 to 42, device interface control circuits 411 to 41n, micro program control circuits 421 to 42n, frame buffer 431.
To 43n, serial-parallel conversion circuits 441 to 44n,
It has data buffers 451 to 45n. At this time, the I / O devices 51 to 5n have different protocols A to
Suppose it is controlled by C.

When the microprogram of each section is initialized and becomes a ready state as a system and an input / output request is made from the operating software (OS), a central processing unit (not shown) inputs / outputs (hereinafter I / O) to / from the main memory 1. The command is prepared and notified to the data transfer device of the first embodiment. Upon receiving this notification, the channel control device 2 reads out necessary information from the main memory 1 and determines which device, channel and remote channel to activate. For example, if the input / output request is for the I / O device 52, the paths of the remote channel 42 and the channel 32 are used. Channel 32 and remote channel 4 at this time
Communication between the two microprograms is performed using the frame buffer.

FIG. 2A shows the types of communication frames on the frame buffer 33n in the channel 3n and the frame buffer 44n in the remote channel 4n. By transmitting and receiving a frame defined by the delimiter for Protocol B to support the I / O device 52 controlled by Protocol B, the microprogram operating on channel 32 and the microprogram operating on remote channel 42 I / O commands are executed. Even in the case of the I / O device 51, the frame for Protocol A is used to execute the I / O command.

In this way, I / Os of different protocols can be installed in a single data transfer device by using the optical transmission lines having the same specifications.
It has a device control mechanism and changes the frame format sent on the optical transmission line by a microprogram to control different I / O devices.

Referring to FIG. 2A, the 4-bit delimiter value "0011" indicates the channel program starting protocol B, the data width is 16 bytes (B), and the delimiter value "0001" indicates the channel program starting protocol A.
The data width is 10 bytes (B). This condition is met by the micro program control circuit 31 of the channels 31 to 3n.
If the microprogram stored in the 1-31n and the microprogram stored in the microprogram control circuits 421-42n of the remote channels 41 to 4n are recognized, the common optical transmission line 61-6n to the serial / parallel conversion circuit 341 are recognized. 34n or 441-44n and frame buffer 331-33n or 431-4
The delimiter of the standard frame given via 3n is used as the microprogram control circuit 311-31n or 421-.
42n microprogram detects. Next, if a check bit is added after the data width defined by the condition, the frame format can be changed. In addition, the receiving microprogram can check whether a frame with a specified data width is given after detecting the delimiter.

As a result, in the first embodiment, an I / O device having a plurality of parallel I / O protocols of different types can be controlled by one type of serial transmission line.

Referring to FIG. 3, the second embodiment of the present invention is a data transfer device which is connected to the main memory 1 and comprises a channel control device 2 and channels 31 to 3n, which are remote channels 41 to 4n. And the common optical transmission line 6
The I / O device groups 51 to 5n connected by 1 to 6n and having different protocols are controlled to exchange data with the main memory 1. Microprogram control circuits 311 to 31n, data buffers 321 to 32n, frame buffers 331 to 33n, serial / parallel conversion circuits 341 to 34n, and an arithmetic circuit 35 are included in the channels 31 to 3n.
It has 1 to 35n. In the remote channels 41 to 4n, device interface control circuits 411 to 41n,
Micro program control circuits 421 to 42n, frame buffers 431 to 43n, serial-parallel conversion circuit 4
41 to 44n, data buffers 451 to 45n, and optical transmission line branch circuits 461 to 46n. Also at this time I
The / O devices 51 to 5n are controlled by different protocols A to C.

When the microprogram of each part is initialized and the system becomes ready, and an input / output request is issued from the operating software (OS), a central processing unit (not shown) prepares I / O instructions in the main memory 1. The data transfer device according to this embodiment is notified. Upon receiving this notification, the channel controller 2 reads out the necessary information from the main memory 1 and determines which device, channel and remote channel to activate. For example, if the input / output request is for the device 52, the paths of the remote channel 42 and the channel 31 are used. At this time, communication between the micro programs of the channel 31 and the remote channel 42 is performed using the frame buffer.

FIG. 2A shows the types of communication frames on the frame buffer 33n in the channel 3n and the frame buffer 44n in the remote channel 4n. Both microprograms send and receive frames defined by the delimiter for protocol B to support I / O device 52 controlled by protocol B, and
O command is executed. Even in the case of the I / O device 51, the frame for Protocol A is used to execute the I / O command.

Referring to FIG. 2B, there is shown a structure included in the frame of the remote channel identifier used for distinguishing the destination and the destination when the remote channels are mixed. Check the contents of this field in this frame,
The remote channel can be set to remote channel 4 by setting
Distinguish between 1 and 42. The channel 31 sets a channel identifier every time frame data is transmitted, and the remote channel 41 which receives the frame data including this channel identifier
Confirms this identifier each time it is received, and checks whether its own remote channel 41 is another remote channel 42. If the other remote channel 42 is indicated by the channel identifier, this frame data is sent to the other remote channel 42 via the optical transmission path branch circuit 461.

In this way, by using one optical transmission line, I / O device control functions of different protocols are provided in a single data transfer device, and different I / O devices are provided by changing the frame format sent on the optical transmission line. / O device is controlled.

Referring to FIG. 4, the third embodiment of the present invention is a data transfer device which is connected to the main memory 1 and comprises a channel control device 2 and channels 31 to 3n, which are remote channels 41 to 4n. And the common optical transmission line 6
The I / O device groups 51 to 5n connected by 1 to 6n and having different protocols are controlled to exchange data with the main memory 1. The channels 31 to 3n have micro program control circuits 311 to 31n, data buffers 321 to 32n, frame buffers 331 to 33n, serial / parallel conversion circuits 341 to 34n, and arithmetic circuits 351 to 35n. Device interface control circuits 411-41 are included in the remote channels 41-42.
n, micro program control circuits 421 to 42n, frame buffers 431 to 43n, serial-parallel conversion circuits 441 to 44n, and data buffers 451 to 45.
have n. At this time, I / O device groups 51 to 5
It is assumed that each of n is controlled by different protocols A to C. The director device 81 is located between the channels 31 to 3n and the remote channels 41 to 4n. As shown in FIG. 5, its structure is (m + 1) × (m + 1) crossbar switch 811, crossbar switch control table 81.
2, a micro program control circuit 813, a frame buffer 814, a serial / parallel conversion circuit 815, and serial input / output ports 8161 to 816m.

When the microprogram of each section is initialized and the system becomes ready, and an input / output request is issued from the operating software (OS), a central processing unit (not shown) prepares I / O instructions in the main memory 1. The data transfer device of this embodiment is notified. Upon receiving this notification, the channel controller 2 reads out the necessary information from the main memory 1 and determines which device, channel, remote channel, and director to activate. For example, if the input / output request is to the device 52, the remote channel 42, the director device 81, and the channel 3
Use the 2nd pass. At this time, communication between the channel 32, the remote channel 42, and the microprogram of the director 81 is performed using the frame buffer.

FIG. 2A shows the types of communication frames on the frame buffer 33n of each channel 3n, the frame buffer 44n of the remote channel 4n, and the frame buffer 814 of the director device 81. The I / O controlled by the protocol B is shown. Both microprograms execute I / O commands by transmitting and receiving a frame defined by a delimiter for protocol B to support the device 52. This is the same as in the case of the I / O device 51.
The O instruction is executed. The director device 81 selects a path regardless of the type of protocol.

FIG. 2C shows the structure in the frame of the remote channel identifier and the director port identifier used for distinguishing the destination, the destination and the port in the director when the remote channels are mixed and the director is connected. Each microprogram distinguishes the remote channel and director port by checking and setting the contents of this field in the frame.

At this time, the path selection method of the director 81 will be described with reference to FIG. The serial data input from the input / output port 8161 is input to the crossbar switch 811. Since the crossbar switch control table 812 sets the crossbar switch to connect the preset path selection path, if 8161 and 8164 are connected on the crossbar, they are output to the port 8164. In addition, when making a 1: 2 connection from a certain channel to multiple remote channels as shown in Fig. 4, the channel side input port 8
161, the remote-side output ports 8164 and 8165 are simultaneously distributed to the remote-side input port 816.
Inputs 4 and 8165 are managed in a control table so that they are merged in frame units and sent to the channel side output port 8161.

In this way, a plurality of the same optical transmission lines are used to provide input / output device control mechanisms (hereinafter, I / O device control mechanisms) of different protocols in a single data transfer device, and microprograms are used to provide optical transmission lines on the optical transmission lines. By controlling the different I / O devices by changing the frame format to be sent, and by performing path selection and connection by the director device, busy management of paths and configuration control can be centrally managed.

Referring to FIG. 6, the fourth embodiment of the present invention is a data transfer device which is connected to the main memory 1 and comprises a channel control device 2 and channels 31 to 3n, which are remote channels 41 to 4n. And the common optical transmission line 6
The I / O device groups 51 to 5n connected by 1 to 6n and having different protocols are controlled to exchange data with the main memory 1. The channel control device 2 includes a microprogram control circuit 21, an arithmetic circuit 211, a memory access control circuit 22, and a local memory 23 accessible from the channel. Channel 31-
Microprogram control circuits 311 to 31 are included in 3n.
n, data buffers 321 to 32n, frame buffers 331 to 33n, serial-parallel conversion circuits 341 to 341
4n, and arithmetic circuits 351 to 35n. The remote channels 41 to 42 have device interface control circuits 411 to 41n, micro program control circuits 421 to 42n, frame buffers 431 to 43n, serial / parallel conversion circuits 441 to 44n, and data buffers 451 to 45n. Also at this time I /
It is assumed that the O devices 51 to 5n are controlled by different protocols A to C. A director device 81 is connected between the channels 31 to 3n and the remote channels 41 to 4n.

When the microprogram of each part is initialized and the system becomes ready, and an input / output request is issued from the operating software (OS), a central processing unit (not shown) prepares I / O instructions in the main memory 1. The data transfer device of this embodiment is notified. Upon receiving this notification, the microprogram in the channel control device 2 performs address calculation by the calculation circuit 211 to read necessary information from the main memory 1 and uses the memory access circuit 22 to access the memory to determine which device, channel, And get information to decide whether to activate the remote channel. For example, if the input / output request is to the device 52, the paths of the remote channel 42, the director 81, and the channel 32 are used.

FIG. 7A shows the most basic structure of a channel program prepared on the memory by the central processing unit 1, and the data transfer device acquires this channel program and executes input / output processing.

Returning to FIG. 6, the operation of executing the channel program will be described. First, the microprogram control circuit 21 in the channel controller 2 issues an I / O command and obtains the address of the channel program header from a central processing unit (not shown). The microprogram first acquires the microprogram header from this address, and acquires and confirms the path information and device information of the device to which the I / O command is issued from the information in the microprogram header. Device 52
If so, the information is the operation protocol B in the paths of the channel 32, the remote channel 42, the director 81, and the port numbers 8161-8164. In addition, the microprogram of the channel controller sets the channel program body to the channel command entry (hereinafter CCE).
It is acquired in units, arranged in the local memory 23, and notified to the microprogram of the channel 32. Channel 32
And the microprogram of the remote channel 42 sequentially sends the I / O commands represented in the CCE to the device 52 via the director 81 and executes them sequentially. When a series of CCEs are exhausted and an I / O completion report is issued from the device 52, each microprogram edits the status of the device 52, the director device 81 and the channels 32 and 42 and stores them in the local memory 23. Upon receipt of this report, the microprogram of the channel control unit 2 gives an input / output interrupt to the central processing unit and ends the operation. This series of memory accesses are all performed by the memory access circuit 22.
All the acquired channel program-related information is stored in the local memory 23.

By thus controlling all I / O devices of different protocols on a single local memory, different I / Os can be controlled using the same optical transmission line in a single data transfer device.

Referring to FIG. 8, the fifth embodiment of the present invention is a data transfer device which is connected to the main memory 1 and comprises a channel control device 2 and channels 31 to 3n, which are remote channels 41 to 4n. And the common optical transmission line 6
The I / O device groups 51 to 5n connected by 1 to 6n and having different protocols are controlled to exchange data with the main memory 1. The channel control device 2 includes a micro program control circuit 21, an arithmetic circuit 211, a memory access control circuit 22, and a fixed address access table 22.
1 and a local memory 23 accessible from the channel. The channels 31 to 3n have micro program control circuits 311 to 31n, data buffers 321 to 32n, frame buffers 331 to 33n, serial / parallel conversion circuits 341 to 34n, and arithmetic circuits 351 to 35n. Remote channels 41-42
Device interface control circuits 411-4
1n, micro program control circuits 421 to 42n, frame buffers 431 to 43n, serial-parallel conversion circuits 441 to 44n, and data buffers 451 to 4
It has 5n. At this time, the I / O devices 51 to 5n are controlled by different protocols A to C. A director device 81 is connected between the channels 31 to 3n and the remote channels 41 to 4n.

When the microprogram of each unit is initialized and the system becomes ready, and an input / output request is issued from the operating software (OS), a central processing unit (not shown) prepares I / O instructions in the main memory 1. The data transfer device of this embodiment is notified. Upon receiving this notification, the microprogram in the channel control device 2 performs address calculation by the calculation circuit 211 to read necessary information from the main memory 1 and uses the memory access circuit 22 to access the memory to determine which device, channel, And get information to decide whether to activate the remote channel. For example, if the input / output request is for the device 52, the paths of the remote channel 42, the channel 32, and the director 81 are used. In addition, the address information of the area where the memory access is concentrated is stored in the table 221.
Use the address saved at the time of access.

Referring to FIG. 7A, the most basic structure of the channel program prepared on the memory by the central processing unit is shown. The data transfer device acquires this channel program and executes the input / output operation.

Further, FIG. 7B shows a modified state of the channel program, which is a format in which the channel program is stored in an area on the memory which is predetermined with the OS. This is mainly when virtual machines (VMs) share hardware resources and multiple different OSs run.
Is necessary to manage your unique device.

Returning to FIG. 8, the operation of executing the channel program will be described. First, the microprogram control circuit 21 in the channel controller 2 issues an I / O command and obtains the address of the channel program header from a central processing unit (not shown). At this time, the address area is OS
It is an area determined between and and is registered in the fixed address access table 221. The microprogram first obtains the channel program header from this address, and obtains and confirms the path information and device information of the device to which the I / O command is issued from the information in the channel program header. For example, if the device 52 is channel 32, remote channel 4
2, director 81, and port numbers 8161-81
Information such as operation protocol B is provided in 64 paths. Further, the microprogram of the channel control device acquires the main body of the channel program in CCE units, arranges it on the local memory 23, and notifies the microprogram of the channel 32. The microprograms of the channel 32 and the remote channel 42 sequentially send the I / O commands represented in the CCE to the device 52 via the director 81 and sequentially execute them. When a series of CCEs are attached and an I / O completion report is made from the device 52, each microprogram is sent to the device 52, the director 81 and the channels 32 and 4.
The status of No. 2 is edited and stored in the local memory 23, and the microprogram of the channel controller 2 receiving this report gives an input / output interrupt to the central processing unit to end the operation. This series of memory accesses are all performed through the memory access circuit 22 and the fixed address table 221, and all the acquired channel program-related information is stored in the local memory 23.

By thus controlling all I / O devices of different protocols on a single local memory, different I / Os can be controlled using the same optical transmission line in a single data transfer device. Further, in this embodiment,
Address processing can be simplified and speeded up.

Referring to FIG. 9, a sixth embodiment of the present invention is a data transfer device which is connected to the main memory 1 and comprises a channel control device 2 and channels 31 to 3n, which are remote channels 41 to 4n. And the common optical transmission line 6
The I / O device groups 51 to 5n connected by 1 to 6n and having different protocols are controlled to exchange data with the main memory 1. The channel control device 2 includes a micro program control circuit 21, an arithmetic circuit 211, a memory access control circuit 22, an address conversion circuit 221, and a local memory 23 accessible from the channel. Microprogram control circuits 311 to 31n and data buffers 321 to 31n are provided in the channels 31 to 3n.
32n, frame buffers 331 to 33n, serial-parallel conversion circuits 341 to 34n, and arithmetic circuit 351.
Has ~ 35n. Among the remote channels 41 to 42, device interface control circuits 411 to 41n, micro program control circuits 421 to 42n, frame buffers 431 to 43n, serial-parallel conversion circuit 44.
1 to 44n and data buffers 451 to 45n. At this time, the I / O devices 51 to 5n are controlled by different protocols A to C. Channels 31 to 3
A director device 81 is connected between n and the remote channels 41 to 4n.

When the microprogram of each part is initialized and the system becomes ready, and an input / output request is issued from the operating software (OS), a central processing unit (not shown) prepares I / O instructions in the main memory 1. The data transfer device of this embodiment is notified. Upon receiving this notification, the microprogram in the channel control device 2 performs address calculation by the calculation circuit 211 to read necessary information from the main memory 1 and performs memory access using the memory access circuit 22 to determine which device, channel and Get information that determines whether to activate a remote channel. For example, if the input / output request is for the device 52, the paths of the remote channel 42, the channel 32, and the director 81 are used. At this time, the address conversion circuit 221
Is configured to access the address indicated by the content data of the qualified address.

FIG. 7A shows the most basic structure of the channel program prepared on the memory by the central processing unit. The data transfer device acquires this channel program and executes input / output processing. A first channel program modification method is shown in FIG. 7C, and a channel program for another true input / output device exists at the location modified in the data address part of the CCE. This is because the method of modifying a plurality of input / output devices is different and the stepping property of the channel program does not match. That is, normally, a channel program is an aggregate of command strings, and executing each command one by one is called stepping. This is because in the case of a device in which the OS directly manages timing, the stepping property may not be guaranteed under different OSs. At this time, not only the channel program but also a part of the write data or the local memory 23
It has to be stored in and its size can be quite large.

Returning to FIG. 9, the operation of executing the channel program will be described. First, the microprogram control circuit 21 in the channel controller 2 issues an I / O command and obtains the address of the channel program header from a central processing unit (not shown). The microprogram first acquires the channel program header from this address, and acquires and confirms the path information and device information of the device to which the I / O command is issued from the information in the header. For example, if the device 52 is channel 32, remote channel 4
2, director 81, and port numbers 8161-81
Information such as operation protocol B is provided in 64 paths. Further, the microprogram of the channel control device takes out the entire channel program body from the area modified by the CCE data address, arranges it on the local memory 23, and notifies the microprogram of the channel 32.
The channel 32 and remote channel 42 microprograms send the stored channel program I / O commands to the device 52 via the director 81 for sequential execution. When the I / O completion report is issued from the device 52, each microprogram edits the status of the device 52, the director 81 and the channels 32 and 42 and stores them in the local memory 23, and the microprogram of the channel controller 2 which receives the report. The program gives an input / output interrupt to the central processing unit to end the operation. This series of memory accesses are all performed through the memory access circuit 22 and the address conversion circuit 221, and all the acquired channel program-related information is stored in the local memory 23.

By thus controlling all I / O devices of different protocols on a single local memory, different I / O can be controlled using the same optical transmission line in a single data transfer device. In this embodiment, it is possible to further improve the control performance when controlling different I / O devices.

Referring to FIG. 10, the seventh embodiment of the present invention is connected to the main memory 1 and the channel controller 2 is connected.
And the channels 31 to 3n, which are common to the remote channels 41 to 4n.
The I / O device groups 51 to 5n connected by 1 to 6n and having different protocols are controlled to exchange data with the main memory 1. The channel control device 2 includes a micro program control circuit 21, an arithmetic circuit 211, a read device storage table 212, and a memory access control circuit 2.
2 and a local memory 23 accessible from the channel. Microprogram control circuits 311 to 31n and a data buffer 32 are included in the channels 31 to 3n.
1-32n, frame buffers 331-33n, serial-parallel conversion circuits 341-34n, and arithmetic circuit 3
It has 51-35n. Device interface control circuits 411-41 are included in the remote channels 41-42.
n, micro program control circuits 421 to 42n, frame buffers 431 to 43n, serial-parallel conversion circuits 441 to 44n, and data buffers 451 to 45.
have n. At this time, the I / O devices 51 to 5n are controlled by different protocols A to C. Channel 3
A director 81 is connected between 1 to 3n and remote channels 41 to 4n.

When the microprogram of each section is initialized and the system becomes ready, and an input / output request is issued from the operating software (OS), a central processing unit (not shown) prepares I / O instructions in the main memory 1. The data transfer device of this embodiment is notified. Upon receiving this notification, the microprogram in the channel control device 2 performs address calculation by the calculation circuit 211 to read necessary information from the main memory 1 and uses the memory access circuit 22 to access the memory to determine which device, channel, And get information to decide whether to activate the remote channel. For example, if the input / output request is for the device 52, the paths of the remote channel 42, the channel 32 and the director 81 are used. Reading device storage table 2
A device number, a pass number, and a channel program reading channel program of a predetermined channel program storage device are stored in the reference numeral 12.

FIG. 7A shows the most basic structure of the channel program prepared on the memory by the central processing unit, and the data transfer unit acquires this channel program and executes the input / output processing. A second channel program modification method is shown in FIG.
3 has a channel program read from another device. This is a case where the control methods of a plurality of I / O devices are different from each other and the stepping properties of the channel programs do not match, and the channel programs that do not match cannot be resident in the memory. At this time, all the channel programs need to be stored in the local memory 23, and the size thereof becomes considerably large. The input / output processing OS for the device for reading the channel program is performed in a place unknown to the user. If this input / output processing ends abnormally, the favorite input / output processing ends abnormally. Make a distinction.

Returning to FIG. 10, the operation of executing the channel program will be described. First, the microprogram control circuit 21 in the channel controller 2 issues an I / O command and obtains the address of the channel program header from a central processing unit (not shown). The microprogram first obtains the channel program header from this address, and obtains and confirms the path information and device information of the target device issued by the I / O command from the information in the header. For example, for device 52, channel 32, remote channel 42, director 81, and port number 8161-
This is information such as the operation protocol B using the 8164 path. Further, the microprogram of the channel control device retrieves the entire channel program main body using the device number stored in the read device storage table 212 and the channel program, and the local memory 2
3 to notify the microprogram of channel 32. The channel 32 and remote channel 42 microprograms are stored in the stored channel program I /
The O command is sent to the device 52 via the director 81 and sequentially executed. When the I / O completion report is issued from the device 52, each microprogram is sent to the device 5
2. The statuses of the director 81 and the channels 32 and 42 are edited and stored in the local memory 23, and the microprogram of the channel controller 2 which has received the report notifies the central processing unit of an input / output interrupt and ends the operation.
This series of memory accesses are all performed through the memory access circuit 22 and the address conversion circuit 221, and all the acquired channel program-related information is stored in the local memory 23.

By thus controlling all I / O devices of different protocols on a single local memory, different I / O devices can be controlled using the same optical transmission line in a single data transfer device. .

Referring to FIG. 11, the eighth embodiment of the present invention is a data transfer device which is connected to the main memory 1 and comprises a channel control device 2 and channels 31 to 3n, which are remote channels 41 to 4n. Is a common optical transmission line 6
The I / O device groups 51 to 5n connected by 1 to 6n and having different protocols are controlled to exchange data with the main memory 1. The channel control device 2 includes a micro program control circuit 21, an arithmetic circuit 211, a command conversion tail 212, a memory access control circuit 22, and a local memory 23 accessible from the channel. Microprogram control circuits 311 to 31n and a data buffer 321 are included in the channels 31 to 3n.
To 32n, frame buffers 331 to 33n, serial-parallel conversion circuits 341 to 34n, and arithmetic circuit 35.
Have 1 to 35n. Remote channels 41-42
Device interface control circuits 411-4
1n, micro program control circuits 421 to 42n, frame buffers 431 to 43n, serial-parallel conversion circuits 441 to 44n, and data buffers 451 to 4
I have 5n. At this time, I / O devices 51-5
Let n be controlled by different protocols A-C. A director device 81 is connected between the channels 31 to 3n and the remote channels 41 to 4n.

When the microprogram of each part is initialized and the system becomes ready, and an input / output request is issued from the operating software (OS), a central processing unit (not shown) prepares I / O instructions in the main memory 1. The data transfer device of this embodiment is notified. Upon receiving this notification, the microprogram in the channel control device 2 performs address calculation by the calculation circuit 211 to read necessary information from the main memory 1 and uses the memory access circuit 22 to access the memory to determine which device, channel,
And get information to decide whether to activate the remote channel. For example, if the input / output request is for the device 52, the paths of the remote channel 42, the channel 32, and the director 81 are used. At this time, the command conversion table 212 is referred to by the microprogram of the channel controller 2 and loaded in advance.

FIG. 7A shows the most basic structure of the channel program prepared on the memory by the central processing unit, and the data transfer unit acquires this channel program and executes the input / output processing.

FIG. 12 shows a command conversion method of the channel program. An example of conversion for converting a command of the same function of an I / O device such as a magnetic disk controlled by a different OS with the same function into a command of a representative device is shown. The command of the channel program issued by the OS is shown in the left column, and the command of the different same function device after conversion is shown in the right table. In response to the command ~ from the OS, the commands (1) to (4) are sent to the I / O device. (3) 'is a command to retry the search in the channel if the Search command fails. There is no such command because the search of is retried on the I / O device side. Commands that are not compatible with stepping are combined in the conversion table and absorbed inside the channel.

Returning to FIG. 11, the operation of executing the channel program will be described. First, the microprogram control circuit 21 in the channel controller 2 issues an I / O command and obtains the address of the channel program header from a central processing unit (not shown). The microprogram first acquires the channel program header from this address, and from the information in the header, acquires and confirms the path information of the device to which the I / O command is issued and the device information. For example, for device 52, channel 32, remote channel 42, director 81, and port number 8161-
This is information such as the operation protocol B using the 8164 path. In addition, the microprogram of the channel control device stores the entire channel program body in the local memory 2
3 and uses the conversion table 212 to notify the microprogram of the channel 32 after conversion. Channel 32
Also, the microprogram of the remote channel 42 sends the I / O command of the stored channel program to the device 52 via the director 81 to sequentially execute it. When the I / O completion report is issued from the device 52, each microprogram edits the status of the device 52, the director 81 and the channels 32 and 42 and stores them in the local memory 23, and the microprogram of the channel controller 2 which receives the report. The program gives an input / output interrupt to the central processing unit to end the operation. This series of memory accesses are all performed through the memory access circuit 22, and all the acquired channel program related information is stored in the local memory 23. In addition, each microprogram translates the status where conversion is required.

By thus controlling all I / O devices of different protocols on a single local memory, different I / Os can be controlled using the same optical transmission line in a single data transfer device.

[0061]

As described above, according to the present invention, I / O devices of different protocols are connected to the same optical transmission line in a single data transfer device, and information of different formats is sent in frame units depending on the protocol. A single large-capacity local memory is used to control all devices, common control is performed within the data transfer device, and at least all channel programs are taken into local memory, and the memory program conforms to the channel program modification method. Simplify hardware design of data transfer device that controls I / O devices of different models by simplifying address calculation and shortening access time by having functions in hardware, operability when connecting between different models, and connection It is possible to improve the transferability and speed up the transfer performance.

[Brief description of drawings]

FIG. 1 is a diagram showing a first embodiment of the present invention.

FIG. 2 is a diagram showing a concept of transferred frames.

FIG. 3 is a diagram showing a second embodiment of the present invention.

FIG. 4 is a block diagram showing a third embodiment of the present invention.

5 is a diagram showing a detailed configuration of a director device 81. FIG.

FIG. 6 is a diagram showing a fourth embodiment of the present invention.

FIG. 7 is a diagram showing the structure of a channel program.

FIG. 8 is a diagram showing a fifth embodiment of the present invention.

FIG. 9 is a diagram showing a sixth embodiment of the present invention.

FIG. 10 is a diagram showing a seventh embodiment of the present invention.

FIG. 11 is a diagram showing an eighth embodiment of the present invention.

FIG. 12 is a diagram showing the concept of a command conversion table.

[Explanation of symbols]

 1 Main Memory 2 Channel Controller 21 Micro Program Control Circuit 22 Memory Access Circuit 23 Local Memory 31 Channel 32 Channel 3n Channel 41 Remote Channel 42 Remote Channel 4n Remote Channel 51 I / O Device 52 I / O Device 5n I / O Device 61 Common optical transmission line 62 Common optical transmission line 6n Common optical transmission line 81 Director device 211 Arithmetic circuit 212 Read device storage table 221 Fixed address access table 311 Micro program control circuit 312 Micro program control circuit 31n Micro program control circuit 321 Data Buffer 322 Data buffer 32n Data buffer 331 Frame buffer 332 Frame buffer 33n Frame buffer 341 Serial parallel conversion circuit 342 Serial parallel conversion circuit 34n Serial parallel conversion circuit 411 Device interface control circuit 412 Device interface control circuit 41n Device interface control circuit 421 Micro program control circuit 422 Micro program control circuit 42n Micro program control circuit 431 Frame buffer 432 Frame buffer 43n frame buffer 441 serial-parallel conversion circuit 442 serial-parallel conversion circuit 44n serial-parallel conversion circuit 451 data buffer 452 data buffer 45n data buffer 811 crossbar switch 812 crossbar switch control table 813 microprogram control circuit 814 frame buffer 815 serial parallel Circuit

Claims (6)

(57) [Claims] 1. A serial transmission line and this serial transmission line
More connected to the input-output device with the at least one channel unit connected to one end, the two even connected to the other end of the serial transmission line Rutotomoni least <br/> no different parallel input protocol of the data transfer device including a remote channel unit, said channel unit side and front of the front Symbol serial transmission line
Delimiter indicating the data width is displayed on both the remote channel side.
Data is added to the data to form a frame and
Means for sending a frame to the serial transmission line;
When the delimiter is received via the serial transmission line,
According to the data width indicated by the delimiter,
Means for determining the data width of the system, and the channel unit and the plurality of channel units
Is connected to the director device via the serial transmission line.
This director device is connected via the serial transmission line.
Which serial data is given to which channel unit
Switch selection means for selecting whether to give and this switch
A control table for setting and switching the bus selection path of the selection means,
Data transfer apparatus characterized by comprising a. 2. Based on input / output instructions from a central processing unit
Read the channel program stored in the storage means
The micro program controller that controls
Chromatic data read under the control of the black program controller
Channel having a local memory for storing a channel program.
A channel controller from which the channel program from the channel controller
After execution on the I / O device,
The number of the channel unit and the director device is small.
Collect at least one state and store it in the local memory
The method of claim 1, further comprising:
Data transfer device. 3. The microprogram controller is the
The storage means based on input / output commands from the central processing unit
When reading the channel program from
For setting at least one specific address range
An address access table is provided in the channel controller.
The data transfer device according to claim 2, wherein the data transfer device is provided. 4. A microprogram of the channel controller.
Ram has a channel program in the channel controller.
Input a part from the storage means and input / output device unit
Channel for generating addresses and stored in the storage means
3. The program is pre-fetched.
Data transfer device . 5. The channel controller is a channel to be incorporated.
Channel Pro from the device that holds the channel program
Said central means provided with means for storing information necessary for gram transfer
Channel input from the input / output device specified by the processor
The program according to claim 2, wherein the program is acquired.
Data transfer device. 6. The channel controller has different specifications.
Equipped with table means for converting I / O device commands
Command from the central processing unit.
3. The conversion is performed by using a cable means.
The described data transfer device.