wireguard-linux/arch/openrisc/kernel/dma.c, branch jd/unified-crypt-queue

openrisc: use the generic in-place uncached DMA allocator

2020-03-16T09:48:16Z

Switch openrisc to use the dma-direct allocator and just provide the hooks for setting memory uncached or cached. Signed-off-by: Christoph Hellwig Reviewed-by: Stafford Horne Reviewed-by: Robin Murphy

dma-mapping: drop the dev argument to arch_sync_dma_for_*

2019-11-20T19:31:38Z

These are pure cache maintainance routines, so drop the unused struct device argument. Signed-off-by: Christoph Hellwig Suggested-by: Daniel Vetter

pagewalk: separate function pointers from iterator data

2019-09-07T07:28:04Z

The mm_walk structure currently mixed data and code. Split out the operations vectors into a new mm_walk_ops structure, and while we are changing the API also declare the mm_walk structure inside the walk_page_range and walk_page_vma functions. Based on patch from Linus Torvalds. Link: https://lore.kernel.org/r/20190828141955.22210-3-hch@lst.de Signed-off-by: Christoph Hellwig Reviewed-by: Thomas Hellstrom Reviewed-by: Steven Price Reviewed-by: Jason Gunthorpe Signed-off-by: Jason Gunthorpe

mm: split out a new pagewalk.h header from mm.h

2019-09-07T07:28:04Z

Add a new header for the two handful of users of the walk_page_range / walk_page_vma interface instead of polluting all users of mm.h with it. Link: https://lore.kernel.org/r/20190828141955.22210-2-hch@lst.de Signed-off-by: Christoph Hellwig Reviewed-by: Thomas Hellstrom Reviewed-by: Steven Price Reviewed-by: Jason Gunthorpe Signed-off-by: Jason Gunthorpe

Merge tag 'dma-mapping-5.3' of git://git.infradead.org/users/hch/dma-mapping

2019-07-12T22:13:55Z

Pull dma-mapping updates from Christoph Hellwig: - move the USB special case that bounced DMA through a device bar into the USB code instead of handling it in the common DMA code (Laurentiu Tudor and Fredrik Noring) - don't dip into the global CMA pool for single page allocations (Nicolin Chen) - fix a crash when allocating memory for the atomic pool failed during boot (Florian Fainelli) - move support for MIPS-style uncached segments to the common code and use that for MIPS and nios2 (me) - make support for DMA_ATTR_NON_CONSISTENT and DMA_ATTR_NO_KERNEL_MAPPING generic (me) - convert nds32 to the generic remapping allocator (me) * tag 'dma-mapping-5.3' of git://git.infradead.org/users/hch/dma-mapping: (29 commits) dma-mapping: mark dma_alloc_need_uncached as __always_inline MIPS: only select ARCH_HAS_UNCACHED_SEGMENT for non-coherent platforms usb: host: Fix excessive alignment restriction for local memory allocations lib/genalloc.c: Add algorithm, align and zeroed family of DMA allocators nios2: use the generic uncached segment support in dma-direct nds32: use the generic remapping allocator for coherent DMA allocations arc: use the generic remapping allocator for coherent DMA allocations dma-direct: handle DMA_ATTR_NO_KERNEL_MAPPING in common code dma-direct: handle DMA_ATTR_NON_CONSISTENT in common code dma-mapping: add a dma_alloc_need_uncached helper openrisc: remove the partial DMA_ATTR_NON_CONSISTENT support arc: remove the partial DMA_ATTR_NON_CONSISTENT support arm-nommu: remove the partial DMA_ATTR_NON_CONSISTENT support ARM: dma-mapping: allow larger DMA mask than supported dma-mapping: truncate dma masks to what dma_addr_t can hold iommu/dma: Apply dma_{alloc,free}_contiguous functions dma-remap: Avoid de-referencing NULL atomic_pool MIPS: use the generic uncached segment support in dma-direct dma-direct: provide generic support for uncached kernel segments au1100fb: fix DMA API abuse ...

openrisc: remove the partial DMA_ATTR_NON_CONSISTENT support

2019-06-25T06:14:39Z

The openrisc DMA code supports DMA_ATTR_NON_CONSISTENT allocations, but does not provide a cache_sync operation. This means any user of it will never be able to actually transfer cache ownership and thus cause coherency bugs. Signed-off-by: Christoph Hellwig Acked-by: Stafford Horne

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152

2019-05-30T18:26:32Z

Based on 1 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license as published by the free software foundation either version 2 of the license or at your option any later version extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 3029 file(s). Signed-off-by: Thomas Gleixner Reviewed-by: Allison Randal Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070032.746973796@linutronix.de Signed-off-by: Greg Kroah-Hartman

dma-mapping: zero memory returned from dma_alloc_*

2018-12-20T07:13:52Z

If we want to map memory from the DMA allocator to userspace it must be zeroed at allocation time to prevent stale data leaks. We already do this on most common architectures, but some architectures don't do this yet, fix them up, either by passing GFP_ZERO when we use the normal page allocator or doing a manual memset otherwise. Signed-off-by: Christoph Hellwig Acked-by: Geert Uytterhoeven [m68k] Acked-by: Sam Ravnborg [sparc]

openrisc: use generic dma_noncoherent_ops

2018-07-21T04:49:48Z

Switch to the generic noncoherent direct mapping implementation. Signed-off-by: Christoph Hellwig Signed-off-by: Stafford Horne

openrisc: fix cache maintainance the the sync_single_for_device DMA operation

2018-07-21T04:49:48Z

The cache maintaince in the sync_single_for_device operation should be equivalent to the map_page operation to facilitate reusing buffers. Fix the openrisc implementation by moving the cache maintaince performed in map_page into the sync_single method, and calling that from map_page. Signed-off-by: Christoph Hellwig Signed-off-by: Stafford Horne