On Mon, May 13, 2019 at 06:01:39PM +0000, mario.limoncie...@dell.com wrote: > When using HMB the SSD will be writing to some memory mapped region. > Writing to > that region would use DMA to access host memory, no?
Memory mapped region? It will use the devices DMA engine to write host memory, which we explicitly allowed it. > If the DMA controller is not functional writing to that region won't work > properly as > it can't access that memory. The DMA controller is in the device. External DMA controllers are only used on very low-end periphals, usually cheap IP blocks like SPI controllers or similar.
