- 27 8月, 2013 1 次提交
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由 Marek Szyprowski 提交于
This patch cleans the initialization of dma contiguous framework. The all-in-one dma_declare_contiguous() function is now separated into dma_contiguous_reserve_area() which only steals the the memory from memblock allocator and dma_contiguous_add_device() function, which assigns given device to the specified reserved memory area. This improves the flexibility in defining contiguous memory areas and assigning device to them, because now it is possible to assign more than one device to the given contiguous memory area. Such split in initialization procedure is also required for upcoming device tree support. Signed-off-by: NMarek Szyprowski <m.szyprowski@samsung.com> Acked-by: NKyungmin Park <kyungmin.park@samsung.com> Acked-by: NMichal Nazarewicz <mina86@mina86.com> Acked-by: NTomasz Figa <t.figa@samsung.com>
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- 20 8月, 2013 1 次提交
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由 Hanjun Guo 提交于
__init belongs after the return type on functions, not before it. Signed-off-by: NHanjun Guo <hanjun.guo@linaro.org> Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
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- 11 12月, 2012 1 次提交
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由 Vitaly Andrianov 提交于
This commit changes the CMA early initialization code to use phys_addr_t for representing physical addresses instead of unsigned long. Without this change, among other things, dma_declare_contiguous() simply discards any memory regions whose address is not representable as unsigned long. This is a problem on 32-bit PAE machines where unsigned long is 32-bit but physical address space is larger. Signed-off-by: NVitaly Andrianov <vitalya@ti.com> Signed-off-by: NCyril Chemparathy <cyril@ti.com> Acked-by: NMichal Nazarewicz <mina86@mina86.com> Signed-off-by: NMarek Szyprowski <m.szyprowski@samsung.com>
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- 23 10月, 2012 1 次提交
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由 Laurent Pinchart 提交于
Use the definition from linux/sizes.h instead. Signed-off-by: NLaurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: NMarek Szyprowski <m.szyprowski@samsung.com>
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- 02 10月, 2012 1 次提交
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由 Michal Nazarewicz 提交于
The dma_alloc_from_contiguous() function returns either a valid pointer to a page structure or NULL, the error code set when pageno >= cma->count is not used at all and can be safely removed. This commit also changes the function to avoid goto and have only one exit path and one place where mutex is unlocked. Signed-off-by: NMichal Nazarewicz <mina86@mina86.com> [fixed compilation break caused by missing semicolon] Signed-off-by: NMarek Szyprowski <m.szyprowski@samsung.com>
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- 29 8月, 2012 1 次提交
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由 Marek Szyprowski 提交于
Contiguous Memory Allocator requires each of its regions to be aligned in such a way that it is possible to change migration type for all pageblocks holding it and then isolate page of largest possible order from the buddy allocator (which is MAX_ORDER-1). This patch relaxes alignment requirements by one order, because MAX_ORDER alignment is not really needed. Signed-off-by: NMarek Szyprowski <m.szyprowski@samsung.com> CC: Michal Nazarewicz <mina86@mina86.com> Acked-by: NMichal Nazarewicz <mina86@mina86.com>
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- 21 5月, 2012 1 次提交
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由 Marek Szyprowski 提交于
The Contiguous Memory Allocator is a set of helper functions for DMA mapping framework that improves allocations of contiguous memory chunks. CMA grabs memory on system boot, marks it with MIGRATE_CMA migrate type and gives back to the system. Kernel is allowed to allocate only movable pages within CMA's managed memory so that it can be used for example for page cache when DMA mapping do not use it. On dma_alloc_from_contiguous() request such pages are migrated out of CMA area to free required contiguous block and fulfill the request. This allows to allocate large contiguous chunks of memory at any time assuming that there is enough free memory available in the system. This code is heavily based on earlier works by Michal Nazarewicz. Signed-off-by: NMarek Szyprowski <m.szyprowski@samsung.com> Signed-off-by: NKyungmin Park <kyungmin.park@samsung.com> Signed-off-by: NMichal Nazarewicz <mina86@mina86.com> Acked-by: NArnd Bergmann <arnd@arndb.de> Tested-by: NRob Clark <rob.clark@linaro.org> Tested-by: NOhad Ben-Cohen <ohad@wizery.com> Tested-by: NBenjamin Gaignard <benjamin.gaignard@linaro.org> Tested-by: NRobert Nelson <robertcnelson@gmail.com> Tested-by: NBarry Song <Baohua.Song@csr.com>
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