* Question on DMA mask
@ 2021-02-15 16:27 Noam Liron
0 siblings, 0 replies; only message in thread
From: Noam Liron @ 2021-02-15 16:27 UTC (permalink / raw)
To: dmaengine
Hi everyone,
I am working on a SOC which it's RAM starts at 0x200M.
For some reason I need to limit the DMA allocations up to 0x220M, so I called - dma_set_mask_and_coherent(mmc_dev(mmc), 0x21FFFFFFF).
I noticed that dev->dma_mask was not set, while dev->coherent_dma_mask was set.
Still, calling dma_alloc_coherent returns buffers above the requested limit.
How can I limit the buffer address?
^ permalink raw reply [flat|nested] only message in thread
only message in thread, other threads:[~2021-02-15 16:30 UTC | newest]
Thread overview: (only message) (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2021-02-15 16:27 Question on DMA mask Noam Liron
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.