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| author | Catalin Marinas <catalin.marinas@arm.com> | 2023-06-12 18:31:46 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-12-14 21:53:57 +0300 |
| commit | ed753a3bd904ad17b4cce490f67981d87ec141c8 (patch) | |
| tree | 39abf694c7c74da2118cf7451ac8e63f2a149db9 /include/linux | |
| parent | 5e859e08be57d8752039dd70a6b3b0ce92a56f4d (diff) | |
| download | linux-ed753a3bd904ad17b4cce490f67981d87ec141c8.tar.xz | |
dma: allow dma_get_cache_alignment() to be overridden by the arch code
commit 8c57da28dc3df4e091474a004b5596c9b88a3be0 upstream.
On arm64, ARCH_DMA_MINALIGN is larger than most cache line size
configurations deployed. Allow an architecture to override
dma_get_cache_alignment() in order to return a run-time probed value (e.g.
cache_line_size()).
Link: https://lkml.kernel.org/r/20230612153201.554742-3-catalin.marinas@arm.com
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Tested-by: Isaac J. Manjarres <isaacmanjarres@google.com>
Cc: Robin Murphy <robin.murphy@arm.com>
Cc: Will Deacon <will@kernel.org>
Cc: Alasdair Kergon <agk@redhat.com>
Cc: Ard Biesheuvel <ardb@kernel.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Daniel Vetter <daniel@ffwll.ch>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Cc: Jerry Snitselaar <jsnitsel@redhat.com>
Cc: Joerg Roedel <joro@8bytes.org>
Cc: Jonathan Cameron <jic23@kernel.org>
Cc: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Cc: Lars-Peter Clausen <lars@metafoo.de>
Cc: Logan Gunthorpe <logang@deltatee.com>
Cc: Marc Zyngier <maz@kernel.org>
Cc: Mark Brown <broonie@kernel.org>
Cc: Mike Snitzer <snitzer@kernel.org>
Cc: "Rafael J. Wysocki" <rafael@kernel.org>
Cc: Saravana Kannan <saravanak@google.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/dma-mapping.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/dma-mapping.h b/include/linux/dma-mapping.h index a50375331eac..e13050eb9777 100644 --- a/include/linux/dma-mapping.h +++ b/include/linux/dma-mapping.h @@ -544,6 +544,7 @@ static inline int dma_set_min_align_mask(struct device *dev, return 0; } +#ifndef dma_get_cache_alignment static inline int dma_get_cache_alignment(void) { #ifdef ARCH_HAS_DMA_MINALIGN @@ -551,6 +552,7 @@ static inline int dma_get_cache_alignment(void) #endif return 1; } +#endif static inline void *dmam_alloc_coherent(struct device *dev, size_t size, dma_addr_t *dma_handle, gfp_t gfp) |