Scatter-gather DMA - Factbites

Scatter-gather DMA - Factbites
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Topic: Scatter-gather DMA

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	WEB HOSTING : DAC960 : 2.6.8
		* request sense and scatter gather dma structures are free.
		controllers, appears to work quite well with this driver.
		Aggregate the space needed for the controller's memory mailbox and
	www.oxxus.net /host/2.6.8/hosting-DAC960.htm

	Linux Device Drivers, 2nd Edition: Chapter 13: mmap and DMA
		Scatter-gather mappings are streaming DMA mappings, and the same access rules apply to them as to the single variety.
		Memory mapping is one of the most interesting features of modern Unix systems.
		Confusingly, for device mappings, the major and minor numbers refer to the disk partition holding the device special file that was opened by the user, and not the device itself.
	www.xml.com /ldd/chapter/book/ch13.html (15227 words)

	Writing TURBOchannel Device Drivers
		Additionally, the I/O subsystems for the DEC 3000 series processors allow a TURBOchannel device driver to use a hardware scatter-gather map to transfer data to and from noncontiguous physical memory.
		Digital UNIX now provides generic interfaces to perform DMA data transfer operations.
		This chapter describes when and why you would use the kernel interfaces developed for use with TURBOchannel device drivers.
	www.cs.arizona.edu /computer.help/policy/DIGITAL_unix/AA-PS3HD-TET1_html/tc6.html (665 words)

	Trapeze Overview
		Trapeze supports scatter/gather DMA so that payload buffers may span multiple noncontiguous page frames.
		Trapeze messages are short control messages (maximum 128 bytes) with optional attached payloads typically containing application data not interpreted by the networking system, e.g., file blocks, virtual memory pages, or a TCP segments.
		Trapeze currently hosts kernel-to-kernel RPC communications and zero-copy page migration traffic for network memory and network storage, a user-level communications layer for MPI and distributed shared memory, a low-overhead kernel logging and profiling system, and TCP/IP device drivers for FreeBSD and Digital UNIX.
	www.cs.duke.edu /ari/trapeze/freenix/node4.html (587 words)

	TUX web server - Wikipedia, the free encyclopedia
		With a capable network card, TUX enables scatter-gather DMA from the page cache directly to the network.
		While TUX itself can only serve static web pages, whenever TUX receives a request that it is unsure of or unable to process, it can redirect the request to a traditional userspace web server daemon.
		While TUX was included in standard Linux 2.4 kernels, it was removed from the 2.6 kernel.
	en.wikipedia.org /wiki/TUX_web_server (535 words)

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