On Mon, Sep 28, 2020 at 03:31:28PM +0200, Paul Cercueil wrote: > It's allocated with dma_alloc_wc, but then it's only accessed as > non-coherent. > > Anyway, for the time being I guess you could revert 37054fc81443. But I > have patches on top of it in drm-misc-next so it's going to be a mess. > > If we have time I can come up with a custom dumb_create() fonction, to make > sure that the GEM buffers are allocated with dma_alloc_noncoherent(). Is > there a dma_mmap_noncoherent() too? Please use the lower-level dma_alloc_pages and then just insert the pages directly using remap_pfn_range. Although it might make sense to eventually create a wrapper around remap_pfn_range for all the vma sizing sanity checks. > > -Paul > ---end quoted text---
