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xen: swiotlb: Open code map_resource callback

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General dma_direct_map_resource() is going to be removed
in next patch, so simply open-code it in xen driver.

Reviewed-by: Juergen Gross <jgross@suse.com>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Link: https://lore.kernel.org/r/e9c66a92e818f416875441b6711963f9782dbbeb.1757423202.git.leonro@nvidia.com
This commit is contained in:
Leon Romanovsky
2025-09-09 16:27:38 +03:00
committed by Marek Szyprowski
parent 18c9cbb042
commit bf0ecb3c32
1 changed files with 20 additions and 1 deletions
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21
drivers/xen/swiotlb-xen.c
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@@ -392,6 +392,25 @@ xen_swiotlb_sync_sg_for_device(struct device *dev, struct scatterlist *sgl,
}
}
static dma_addr_t xen_swiotlb_direct_map_resource(struct device *dev,
phys_addr_t paddr,
size_t size,
enum dma_data_direction dir,
unsigned long attrs)
{
dma_addr_t dma_addr = paddr;
if (unlikely(!dma_capable(dev, dma_addr, size, false))) {
dev_err_once(dev,
"DMA addr %pad+%zu overflow (mask %llx, bus limit %llx).\n",
&dma_addr, size, *dev->dma_mask, dev->bus_dma_limit);
WARN_ON_ONCE(1);
return DMA_MAPPING_ERROR;
}
return dma_addr;
}
/*
* Return whether the given device DMA address mask can be supported
* properly. For example, if your device can only drive the low 24-bits
@@ -426,5 +445,5 @@ const struct dma_map_ops xen_swiotlb_dma_ops = {
.alloc_pages_op = dma_common_alloc_pages,
.free_pages = dma_common_free_pages,
.max_mapping_size = swiotlb_max_mapping_size,
.map_resource = dma_direct_map_resource,
.map_resource = xen_swiotlb_direct_map_resource,
};