发明授权
US07047328B1 Method and apparatus for accessing memories having a time-variant response over a PCI bus by using two-stage DMA transfers
失效
通过使用两级DMA传输，通过PCI总线访问具有时变响应的存储器的方法和装置
- 专利标题： Method and apparatus for accessing memories having a time-variant response over a PCI bus by using two-stage DMA transfers
- 专利标题（中）： 通过使用两级DMA传输，通过PCI总线访问具有时变响应的存储器的方法和装置
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申请号： US09904748申请日： 2001-07-13
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公开(公告)号： US07047328B1公开(公告)日： 2006-05-16
- 发明人: Stephan Rosner , Jörg Winkler , Ralf Flemming , Stephen T. Novak
- 申请人： Stephan Rosner , Jörg Winkler , Ralf Flemming , Stephen T. Novak
- 申请人地址： US TX Austin
- 专利权人： Legerity, Inc.
- 当前专利权人： Legerity, Inc.
- 当前专利权人地址： US TX Austin
- 代理机构： Williams, Morgan & Amerson
- 主分类号： G06F13/00
- IPC分类号： G06F13/00
摘要：
The invention relates to an apparatus and a method for accessing memories having a time-variant response over a PCI bus by using two-stage DMA transfers. The invention provides a method for executing a read request over a PCI bus by transferring the requested data from a main memory of a PCI card to a device located on the PCI bus, comprising the steps of obtaining an access request from a read access queue, transferring, by a first DMA transfer, the requested data from the main memory to a buffer memory on the PCI card, and transferring, by a second DMA transfer, the data from the buffer memory to the device.
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