Hi all, I've been implementing IOMMU DMA mapping for arm64, based on tidied-up parts of the existing arch/arm/mm/dma-mapping.c with a clear divide between the arch-specific parts and the general DMA-API to IOMMU-API layer so that that can be shared; similar to what Ritesh started before and was unable to complete[1], but working in the other direction.
The first part of that tidy-up involved ripping out the homebrewed IOVA allocator and plumbing in iova.c, necessitating the changes presented here. The rest is currently sat under arch/arm64 for the sake of getting it working quickly with minimal impact - ideally I'd move it out and port arch/arm before merging, but I don't know quite how impatient people are. Regardless of that decision, this bit stands alone, so here it is. Feel free to ignore patches 1 and 2, since I see Sakari has recently posted a more thorough series for that[2], that frankly looks nicer ;) I've merely left them in as context here. [1]:http://thread.gmane.org/gmane.linux.ports.arm.kernel/331299 [2]:http://article.gmane.org/gmane.linux.kernel.iommu/7436 Robin Murphy (4): iommu: build iova.c for any IOMMU iommu: consolidate IOVA allocator code iommu: make IOVA domain low limit flexible iommu: make IOVA domain page size explicit drivers/iommu/Makefile | 4 ++-- drivers/iommu/intel-iommu.c | 45 ++++++++++------------------------------- drivers/iommu/iova.c | 49 +++++++++++++++++++++++++++++++++++++++++---- include/linux/iova.h | 41 +++++++++++++++++++++++++++++++++---- 4 files changed, 95 insertions(+), 44 deletions(-) -- 1.9.1 _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu
