BMC/Intel-BMC/linux.git/arch/x86/include/asm/dma-mapping.h, branch dev

x86: Deinline dma_free_attrs()

2015-05-05T18:48:02+00:00

Reduces kernel size by 76720 bytes on allyesconfig build: text data bss dec hex filename 82594029 22255352 20627456 125476837 77a9fe5 vmlinux1 82517277 22255384 20627456 125400117 7797435 vmlinux2 Signed-off-by: Denys Vlasenko Cc: Marek Szyprowski Cc: Konrad Rzeszutek Wilk Cc: David Woodhouse Cc: Don Dutile Cc: Andi Kleen Cc: x86@kernel.org Link: http://lkml.kernel.org/r/1428926075-28796-3-git-send-email-dvlasenk@redhat.com Signed-off-by: Thomas Gleixner

x86: Deinline dma_alloc_attrs()

2015-05-05T18:48:02+00:00

Reduces kernel size by 68739 bytes on allyesconfig build: text data bss dec hex filename 82662736 22255384 20627456 125545576 77bac68 vmlinux0 82594029 22255352 20627456 125476837 77a9fe5 vmlinux1 Signed-off-by: Denys Vlasenko Cc: Marek Szyprowski Cc: Konrad Rzeszutek Wilk Cc: David Woodhouse Cc: Don Dutile Cc: Andi Kleen Cc: x86@kernel.org Link: http://lkml.kernel.org/r/1428926075-28796-2-git-send-email-dvlasenk@redhat.com Signed-off-by: Thomas Gleixner

dma-debug: New interfaces to debug dma mapping errors

2012-10-24T15:06:43+00:00

Add dma-debug interface debug_dma_mapping_error() to debug drivers that fail to check dma mapping errors on addresses returned by dma_map_single() and dma_map_page() interfaces. This interface clears a flag set by debug_dma_map_page() to indicate that dma_mapping_error() has been called by the driver. When driver does unmap, debug_dma_unmap() checks the flag and if this flag is still set, prints warning message that includes call trace that leads up to the unmap. This interface can be called from dma_mapping_error() routines to enable dma mapping error check debugging. Tested: Intel iommu and swiotlb (iommu=soft) on x86-64 with CONFIG_DMA_API_DEBUG enabled and disabled. Signed-off-by: Shuah Khan Reviewed-by: Konrad Rzeszutek Wilk Signed-off-by: Joerg Roedel

Merge branch 'for-linus' of git://git.linaro.org/people/mszyprowski/linux-dma-mapping

2012-05-25T16:18:59+00:00

Pull CMA and ARM DMA-mapping updates from Marek Szyprowski: "These patches contain two major updates for DMA mapping subsystem (mainly for ARM architecture). First one is Contiguous Memory Allocator (CMA) which makes it possible for device drivers to allocate big contiguous chunks of memory after the system has booted. The main difference from the similar frameworks is the fact that CMA allows to transparently reuse the memory region reserved for the big chunk allocation as a system memory, so no memory is wasted when no big chunk is allocated. Once the alloc request is issued, the framework migrates system pages to create space for the required big chunk of physically contiguous memory. For more information one can refer to nice LWN articles: - 'A reworked contiguous memory allocator': http://lwn.net/Articles/447405/ - 'CMA and ARM': http://lwn.net/Articles/450286/ - 'A deep dive into CMA': http://lwn.net/Articles/486301/ - and the following thread with the patches and links to all previous versions: https://lkml.org/lkml/2012/4/3/204 The main client for this new framework is ARM DMA-mapping subsystem. The second part provides a complete redesign in ARM DMA-mapping subsystem. The core implementation has been changed to use common struct dma_map_ops based infrastructure with the recent updates for new dma attributes merged in v3.4-rc2. This allows to use more than one implementation of dma-mapping calls and change/select them on the struct device basis. The first client of this new infractructure is dmabounce implementation which has been completely cut out of the core, common code. The last patch of this redesign update introduces a new, experimental implementation of dma-mapping calls on top of generic IOMMU framework. This lets ARM sub-platform to transparently use IOMMU for DMA-mapping calls if one provides required IOMMU hardware. For more information please refer to the following thread: http://www.spinics.net/lists/arm-kernel/msg175729.html The last patch merges changes from both updates and provides a resolution for the conflicts which cannot be avoided when patches have been applied on the same files (mainly arch/arm/mm/dma-mapping.c)." Acked by Andrew Morton : "Yup, this one please. It's had much work, plenty of review and I think even Russell is happy with it." * 'for-linus' of git://git.linaro.org/people/mszyprowski/linux-dma-mapping: (28 commits) ARM: dma-mapping: use PMD size for section unmap cma: fix migration mode ARM: integrate CMA with DMA-mapping subsystem X86: integrate CMA with DMA-mapping subsystem drivers: add Contiguous Memory Allocator mm: trigger page reclaim in alloc_contig_range() to stabilise watermarks mm: extract reclaim code from __alloc_pages_direct_reclaim() mm: Serialize access to min_free_kbytes mm: page_isolation: MIGRATE_CMA isolation functions added mm: mmzone: MIGRATE_CMA migration type added mm: page_alloc: change fallbacks array handling mm: page_alloc: introduce alloc_contig_range() mm: compaction: export some of the functions mm: compaction: introduce isolate_freepages_range() mm: compaction: introduce map_pages() mm: compaction: introduce isolate_migratepages_range() mm: page_alloc: remove trailing whitespace ARM: dma-mapping: add support for IOMMU mapper ARM: dma-mapping: use alloc, mmap, free from dma_ops ARM: dma-mapping: remove redundant code and do the cleanup ... Conflicts: arch/x86/include/asm/dma-mapping.h

X86: integrate CMA with DMA-mapping subsystem

2012-05-21T13:09:38+00:00

This patch adds support for CMA to dma-mapping subsystem for x86 architecture that uses common pci-dma/pci-nommu implementation. This allows to test CMA on KVM/QEMU and a lot of common x86 boxes. Signed-off-by: Marek Szyprowski Signed-off-by: Kyungmin Park CC: Michal Nazarewicz Acked-by: Arnd Bergmann

x86: Introduce CONFIG_X86_DMA_REMAP

2012-04-12T18:10:18+00:00

The default functions phys_to_dma, dma_to_phys implement identity mapping as fast inline functions. Some systems, however, may need a custom function to implement its own mapping between CPU addresses and device addresses. This new configuration option allows the functions to be external when needed (such as for the ConneXt device) Signed-off-by: Alessandro Rubini Link: http://lkml.kernel.org/r/6e4329b772df675f1c442f68e59e844e4dd8c965.1333560789.git.rubini@gnudd.com Acked-by: Giancarlo Asnaghi Cc: Alan Cox Signed-off-by: H. Peter Anvin

x86-32: Introduce CONFIG_X86_DEV_DMA_OPS

2012-04-12T18:09:56+00:00

32-bit x86 systems may need their own DMA operations, so add a new config option, which is turned on for 64-bit systems. This patch has no functional effect but it paves the way for supporting the STA2x11 I/O Hub and possibly other chips. Signed-off-by: Alessandro Rubini Link: http://lkml.kernel.org/r/f79fcc1a2e17ef942e1b798b92aac43a80202532.1333560789.git.rubini@gnudd.com Acked-by: Giancarlo Asnaghi Cc: Alan Cox Signed-off-by: H. Peter Anvin

X86 & IA64: adapt for dma_map_ops changes

2012-03-28T14:36:31+00:00

Adapt core x86 and IA64 architecture code for dma_map_ops changes: replace alloc/free_coherent with generic alloc/free methods. Signed-off-by: Andrzej Pietrasiewicz Acked-by: Kyungmin Park [removed swiotlb related changes and replaced it with wrappers, merged with IA64 patch to avoid inter-patch dependences in intel-iommu code] Signed-off-by: Marek Szyprowski Reviewed-by: Arnd Bergmann Acked-by: Tony Luck

doc: fix broken references

2011-09-27T16:08:04+00:00

There are numerous broken references to Documentation files (in other Documentation files, in comments, etc.). These broken references are caused by typo's in the references, and by renames or removals of the Documentation files. Some broken references are simply odd. Fix these broken references, sometimes by dropping the irrelevant text they were part of. Signed-off-by: Paul Bolle Signed-off-by: Jiri Kosina

dma-mapping: remove dma_is_consistent API

2010-08-11T15:59:21+00:00

Architectures implement dma_is_consistent() in different ways (some misinterpret the definition of API in DMA-API.txt). So it hasn't been so useful for drivers. We have only one user of the API in tree. Unlikely out-of-tree drivers use the API. Even if we fix dma_is_consistent() in some architectures, it doesn't look useful at all. It was invented long ago for some old systems that can't allocate coherent memory at all. It's better to export only APIs that are definitely necessary for drivers. Let's remove this API. Signed-off-by: FUJITA Tomonori Cc: James Bottomley Reviewed-by: Konrad Rzeszutek Wilk Cc: Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds