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path: root/arch/csky/mm/dma-mapping.c
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2022-04-08csky: Fix versioncheck warningsDeyan Wang1-1/+0
$make versioncheck arch/csky/include/asm/io.h: 8 linux/version.h not needed. arch/csky/kernel/process.c: 5 linux/version.h not needed. arch/csky/mm/dma-mapping.c: 12 linux/version.h not needed. comments from Randy: The patch makes sense but these are not compile warnings. They come from scripts/checkversion.pl, which can be called by 'make versioncheck', so I suppose that something in your build system is running 'make versioncheck'. Signed-off-by: Deyan Wang <[email protected]> Acked-by: Randy Dunlap <[email protected]> Signed-off-by: Guo Ren <[email protected]> Signed-off-by: Guo Ren <[email protected]>
2020-10-06dma-mapping: merge <linux/dma-noncoherent.h> into <linux/dma-map-ops.h>Christoph Hellwig1-1/+0
Move more nitty gritty DMA implementation details into the common internal header. Signed-off-by: Christoph Hellwig <[email protected]>
2020-10-06dma-mapping: merge <linux/dma-contiguous.h> into <linux/dma-map-ops.h>Christoph Hellwig1-2/+1
Merge dma-contiguous.h into dma-map-ops.h, after removing the comment describing the contiguous allocator into kernel/dma/contigous.c. Signed-off-by: Christoph Hellwig <[email protected]>
2019-11-20dma-mapping: drop the dev argument to arch_sync_dma_for_*Christoph Hellwig1-4/+4
These are pure cache maintainance routines, so drop the unused struct device argument. Signed-off-by: Christoph Hellwig <[email protected]> Suggested-by: Daniel Vetter <[email protected]>
2019-09-30Merge tag 'csky-for-linus-5.4-rc1' of git://github.com/c-sky/csky-linuxLinus Torvalds1-48/+28
Pull csky updates from Guo Ren: "This round of csky subsystem just some fixups: - Fix mb() synchronization problem - Fix dma_alloc_coherent with PAGE_SO attribute - Fix cache_op failed when cross memory ZONEs - Optimize arch_sync_dma_for_cpu/device with dma_inv_range - Fix ioremap function losing - Fix arch_get_unmapped_area() implementation - Fix defer cache flush for 610 - Support kernel non-aligned access - Fix 610 vipt cache flush mechanism - Fix add zero_fp fixup perf backtrace panic - Move static keyword to the front of declaration - Fix csky_pmu.max_period assignment - Use generic free_initrd_mem() - entry: Remove unneeded need_resched() loop" * tag 'csky-for-linus-5.4-rc1' of git://github.com/c-sky/csky-linux: csky: Move static keyword to the front of declaration csky: entry: Remove unneeded need_resched() loop csky: Fixup csky_pmu.max_period assignment csky: Fixup add zero_fp fixup perf backtrace panic csky: Use generic free_initrd_mem() csky: Fixup 610 vipt cache flush mechanism csky: Support kernel non-aligned access csky: Fixup defer cache flush for 610 csky: Fixup arch_get_unmapped_area() implementation csky: Fixup ioremap function losing csky: Optimize arch_sync_dma_for_cpu/device with dma_inv_range csky/dma: Fixup cache_op failed when cross memory ZONEs csky: Fixup dma_alloc_coherent with PAGE_SO attribute csky: Fixup mb() synchronization problem
2019-08-29dma-mapping: make dma_atomic_pool_init self-containedChristoph Hellwig1-6/+0
The memory allocated for the atomic pool needs to have the same mapping attributes that we use for remapping, so use pgprot_dmacoherent instead of open coding it. Also deduct a suitable zone to allocate the memory from based on the presence of the DMA zones. Signed-off-by: Christoph Hellwig <[email protected]>
2019-08-06csky: Optimize arch_sync_dma_for_cpu/device with dma_inv_rangeGuo Ren1-3/+2
DMA_FROM_DEVICE only need to read dma data of memory into CPU cache, so there is no need to clear cache before. Also clear + inv for DMA_FROM_DEVICE won't cause problem, because the memory range for dma won't be touched by software during dma working. Changes for V2: - Remove clr cache and ignore the DMA_TO_DEVICE in _for_cpu. - Change inv to wbinv cache with DMA_FROM_DEVICE in _for_device. Signed-off-by: Guo Ren <[email protected]> Cc: Arnd Bergmann <[email protected]>
2019-08-06csky/dma: Fixup cache_op failed when cross memory ZONEsGuo Ren1-45/+26
If the paddr and size are cross between NORMAL_ZONE and HIGHMEM_ZONE memory range, cache_op will panic in do_page_fault with bad_area. Optimize the code to support the range which cross memory ZONEs. Changes for V2: - Revert back to postcore_initcall Signed-off-by: Guo Ren <[email protected]> Cc: Christoph Hellwig <[email protected]> Cc: Arnd Bergmann <[email protected]>
2018-12-01csky: use the generic remapping dma alloc implementationChristoph Hellwig1-140/+2
The csky code was largely copied from arm/arm64, so switch to the generic arm64-based implementation instead. Signed-off-by: Christoph Hellwig <[email protected]> Acked-by: Guo Ren <[email protected]>
2018-12-01csky: don't use GFP_DMA in atomic_pool_initChristoph Hellwig1-1/+1
csky does not implement ZONE_DMA, which means passing GFP_DMA is a no-op. Signed-off-by: Christoph Hellwig <[email protected]> Acked-by: Guo Ren <[email protected]>
2018-10-25csky: MMU and page table managementGuo Ren1-0/+254
This patch adds files related to memory management and here is our memory-layout: Fixmap : 0xffc02000 – 0xfffff000 (4 MB - 12KB) Pkmap : 0xff800000 – 0xffc00000 (4 MB) Vmalloc : 0xf0200000 – 0xff000000 (238 MB) Lowmem : 0x80000000 – 0xc0000000 (1GB) abiv1 CPU (CK610) is VIPT cache and it doesn't support highmem. abiv2 CPUs are all PIPT cache and they could support highmem. Lowmem is directly mapped by msa0 & msa1 reg, and we needn't setup memory page table for it. Link:https://lore.kernel.org/lkml/[email protected]/ Signed-off-by: Guo Ren <[email protected]> Cc: Christoph Hellwig <[email protected]> Reviewed-by: Arnd Bergmann <[email protected]>
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