Hi Christoph, On Fri, 2018-05-18 at 15:45 +0200, Christoph Hellwig wrote: > Hi all, > > this series continues consolidating the dma-mapping code, with a focus > on architectures that do not (always) provide cache coherence for DMA. > Three architectures (arm, mips and powerpc) are still left to be > converted later due to complexity of their dma ops selection. > > The dma-noncoherent ops calls the dma-direct ops for the actual > translation of streaming mappins and allow the architecture to provide > any cache flushing required for cpu to device and/or device to cpu > ownership transfers. The dma coherent allocator is for now still left > entirely to architecture supplied implementations due the amount of > variations. Hopefully we can do some consolidation for them later on > as well. > > Because this series sits on top of two previously submitted series > a git tree might be useful to actually test it. It is provided here: > > git://git.infradead.org/users/hch/misc.git arc-dma > > Gitweb: > > https://urldefense.proofpoint.com/v2/url?u=http-3A__git.infradead.org_users_hch_misc.git_shortlog_refs_heads_arc-2Ddma&d=DwIBAg&c=DPL6_X_6JkXFx7 > AXWqB0tg&r=lqdeeSSEes0GFDDl656eViXO7breS55ytWkhpk5R81I&m=QNC0zOG4bRotSxdjQfFXl0dAQJCtnxtF9435wAuJlu0&s=Wad1ptsFpknoSn0ebr3_QMJn9G_D3eIS-LYMwGfOJ- > I&e= > > Changes since previous bigger series: > - take the offset into account in noncoherent_dma_map_page (Alexey Brodkin) > - fix dma directions in arc (Alexey Brodkin) > - split arc changes into smaller patches I really like this series especially how it trimmed down arch/arc/mm/dma.c: ---------------------------->8---------------------------- git diff --stat HEAD~4 arch/arc/Kconfig | 4 +++ arch/arc/include/asm/Kbuild | 1 + arch/arc/include/asm/dma-mapping.h | 21 --------------- arch/arc/mm/cache.c | 2 +- arch/arc/mm/dma.c | 162 ++++++++++------------------------------------------------------------------------------------------------ --------- ---------------------------->8---------------------------- So if we set aside my complaints about direction in arch_sync_dma_for_{device|cpu}()... Tested-by: Alexey Brodkin <abrodkin at synopsys.com> Let's still wait for Vineet's ack as he's the chief maintainer for ARC :) -Alexey
