I am a bit confused by the relation between a DMA controller and device - (let's say NIC) support of DMA.
My questions are -
1. Is it possible to perform DMA operation on a system without any central DMA controller?
2. How are different DMA channels distributed among different devices?
3. When we program DMA for a device, we program the registers on the device or on the DMA controller?
Thanks,
- Meraj
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