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https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
synced 2026-10-26 10:57:38 +08:00
Matteo Kloiber
c15c5befd6
SGTable::new() caps segment length at dma_max_mapping_size() only, which
limits the DMA mapping path (e.g. swiotlb), not the device itself. The
per-device limit from dma_set_max_seg_size() is ignored, so contiguous
page segments can be longer than the declared max segment size,
potentially causing problems for future drivers that use this
abstraction.
Fixes: 05aa6fb1c2 ("rust: scatterlist: Add abstraction for sg_table")
Signed-off-by: Matteo Kloiber <kernel@matt3o12.de>
Reviewed-by: Alexandre Courbot <acourbot@nvidia.com>
Link: https://patch.msgid.link/20260913210828.125655-3-kernel@matt3o12.de
Signed-off-by: Danilo Krummrich <dakr@kernel.org>
57 lines
1.4 KiB
C
57 lines
1.4 KiB
C
// SPDX-License-Identifier: GPL-2.0
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#include <linux/dma-mapping.h>
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__rust_helper void *rust_helper_dma_alloc_attrs(struct device *dev, size_t size,
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dma_addr_t *dma_handle,
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gfp_t flag, unsigned long attrs)
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{
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return dma_alloc_attrs(dev, size, dma_handle, flag, attrs);
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}
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__rust_helper void rust_helper_dma_free_attrs(struct device *dev, size_t size,
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void *cpu_addr,
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dma_addr_t dma_handle,
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unsigned long attrs)
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{
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dma_free_attrs(dev, size, cpu_addr, dma_handle, attrs);
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}
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__rust_helper int rust_helper_dma_set_mask_and_coherent(struct device *dev,
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u64 mask)
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{
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return dma_set_mask_and_coherent(dev, mask);
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}
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__rust_helper int rust_helper_dma_set_mask(struct device *dev, u64 mask)
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{
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return dma_set_mask(dev, mask);
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}
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__rust_helper int rust_helper_dma_set_coherent_mask(struct device *dev, u64 mask)
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{
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return dma_set_coherent_mask(dev, mask);
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}
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__rust_helper int rust_helper_dma_map_sgtable(struct device *dev, struct sg_table *sgt,
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enum dma_data_direction dir, unsigned long attrs)
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{
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return dma_map_sgtable(dev, sgt, dir, attrs);
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}
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__rust_helper size_t rust_helper_dma_max_mapping_size(struct device *dev)
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{
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return dma_max_mapping_size(dev);
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}
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__rust_helper void rust_helper_dma_set_max_seg_size(struct device *dev,
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unsigned int size)
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{
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dma_set_max_seg_size(dev, size);
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}
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__rust_helper unsigned int rust_helper_dma_get_max_seg_size(struct device *dev)
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{
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return dma_get_max_seg_size(dev);
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}
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