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https://docs.microsoft.com/en-us/windows-hardware/drivers/network/ndis-scatter-gather-dma
NDIS miniport drivers can use the Scatter/Gather DMA (SGDMA) method to transfer data between a NIC and system memory. A successful DMA transfer requires the physical address of the data to be in an address range that the NIC supports.
https://docs.microsoft.com/en-us/windows-hardware/drivers/kernel/using-scatter-gather-dma
Using Scatter/Gather DMA. 06/16/2017; 3 minutes to read; In this article. Drivers that perform system or bus-master, packet-based DMA can use support routines designed especially for scatter/gather DMA.
https://knowledge.ni.com/KnowledgeArticleDetails?id=kA00Z0000019NMqSAM
Dec 11, 2019 · Home Support Using Scatter-Gather DMA (Direct Memory Access) with NI DAQ Device. ... The MITE and NI-STC DMA controllers can take segmented memory and perform a move operation on this memory using "scatter-gather" DMA. In this method, the DMA controllers store the starting addresses of all the memory segments. After the move operation starts ...
https://social.msdn.microsoft.com/Forums/windowshardware/en-US/d80423c9-bdf4-4e3d-bcdd-78ad0b992709/ethernet-ndis-miniport-receive-side-dma-approach
Sep 23, 2016 · So I pass the scatter gather element address-length pairs to the NIC in the MiniportProcessSGList function and the DMA seems to work fine. I'm a bit confused on how to do the same on the receive side. My NIC requires 512 buffers for receive in case of high traffic and doesn't support …
https://stackoverflow.com/questions/9770125/zero-copy-with-and-without-scatter-gather-operations
I just read an article that explains the zero-copy mechanism.. It talks about the difference between zero-copy with and without Scatter/Gather supports. NIC without SG support, the data copies are as follows. NIC with SG support, the data copies are as follows. In a word, zero-copy with SG support can eliminate one CPU copy.
https://www.xilinx.com/support/documentation/ip_documentation/dma_sg.pdf
Direct Memory Access and Scatter Gather (v2.01a) 2 www.xilinx.com DS416 April 24, 2009 Product Specification Functional Description The block diagram in Figure 1 shows an overview of the DMA SG, while a detailed block diagram of
https://social.msdn.microsoft.com/Forums/windowshardware/en-US/f5d5ab69-e1d9-46f7-bd2a-6ca36559caf6/ndis-scatter-gather-dma-or-common-buffer-dma-on-ndis-620-
Jul 18, 2016 · Since yours is a "soft" device (FPGA), you should ask the HW engineers to make the scatter-gather list format be the same as what NDIS creates, so you don't need to transform it. No, you don't need to put anything in your INF file about your DMA, but you will need to specify if your hardware uses MSI interrupts -Brian
https://en.wikipedia.org/wiki/Direct_memory_access
Like PCI, no central DMA controller is required since the DMA is bus-mastering, but an arbiter is required in case of multiple masters present on the system. Internally, a multichannel DMA engine is usually present in the device to perform multiple concurrent scatter-gather operations as …
https://www.xilinx.com/support/documentation/ip_documentation/chan_dma_sg.pdf
Channelized Direct Memory Access and Scatter Gather (v1.00a) Channelized DMASG Controller Overview Definitions Direct memory access (DMA) allows for a bounded number of sequential data transfers to take place between regions in the address space (typically between memory and an I/O device) without processor management of individual transfers.
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