On Wed, 30 Mar 2016 09:51:43 -0700 Mark Brown <broonie@xxxxxxxxxx> wrote: > On Wed, Mar 30, 2016 at 05:39:51PM +0200, Boris Brezillon wrote: > > sg_alloc_table_from_buf() provides an easy solution to create an sg_table > > from a virtual address pointer. This function takes care of dealing with > > vmallocated buffers, buffer alignment, or DMA engine limitations (maximum > > DMA transfer size). > > This seems nice. Should we also have a further helper on top of this > which will get constraints from a dmaengine, it seems like it'd be a > common need? Yep, we could create a wrapper extracting dma_slave caps info, converting it to sg_constraints and calling sg_alloc_table_from_buf(). But let's try to get this function accepted first, and I'll send another patch providing this wrapper. BTW, do you see other things that should be added in sg_constraints? -- Boris Brezillon, Free Electrons Embedded Linux and Kernel engineering http://free-electrons.com -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
