Re: [PATCH v2 3/5] drm: Add and export function drm_gem_cma_mmap_noncoherent
From: Christoph Hellwig <hch@infradead.org>
Date: 2021-03-12 16:38:24
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lkml
On Thu, Mar 11, 2021 at 04:12:55PM +0000, Paul Cercueil wrote:
ret = dma_mmap_pages(cma_obj->base.dev->dev,
vma, vma->vm_end - vma->vm_start,
virt_to_page(cma_obj->vaddr));
It works fine.
I think I can use remap_pfn_range() for now, and switch to your new API once
it's available in drm-misc-next.No, drivers must not use dma_to_phys, and they also must not include dma-direct.h.