发明名称 |
Efficient data transfer mechanism for input/output devices |
摘要 |
A method for transferring data between non-contiguous buffers in a memory and an I/O device via a system I/O bus uses a descriptor queue stored in memory. Each descriptor points to a buffer and includes the length of the buffer. The I/O device is provided with the base address of the queue, the length of the queue and a current address which at initialization is the same as the base address. When data is to be transferred a device driver located in the processor sends the number of available descriptors (DescrEnq) to the I/O device which accesses the descriptors individually or in burst mode to gain access to the data buffers identified by the descriptors.
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申请公布号 |
US6163820(A) |
申请公布日期 |
2000.12.19 |
申请号 |
US19990419552 |
申请日期 |
1999.10.19 |
申请人 |
INTERNATIONAL BUSINESS MACHINES CORPORATION |
发明人 |
GARRETT, HENRY MICHAEL;HOLLAND, WILLIAM G.;LOGAN, JOSEPH FRANKLIN;MCDONALD, JOSEPH GERALD;STACY, JOHN KENNETH |
分类号 |
G06F3/06;G06F5/06;(IPC1-7):G06F13/14 |
主分类号 |
G06F3/06 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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