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alpha: use dma_direct_ops for jensen

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The generic dma_direct implementation does the same thing as the alpha
pci-noop implementation, just with more bells and whistles.  And unlike
the current code it at least has a theoretical chance to actually compile.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Matt Turner <mattst88@gmail.com>
This commit is contained in:
Christoph Hellwig
2018-05-09 16:04:51 +02:00
committed by Matt Turner
parent c61a56abab
commit 6db615431a
3 changed files with 5 additions and 33 deletions
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33
arch/alpha/kernel/pci-noop.c
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@@ -102,36 +102,3 @@ SYSCALL_DEFINE5(pciconfig_write, unsigned long, bus, unsigned long, dfn,
else
return -ENODEV;
}
static void *alpha_noop_alloc_coherent(struct device *dev, size_t size,
dma_addr_t *dma_handle, gfp_t gfp,
unsigned long attrs)
{
void *ret;
if (!dev || *dev->dma_mask >= 0xffffffffUL)
gfp &= ~GFP_DMA;
ret = (void *)__get_free_pages(gfp, get_order(size));
if (ret) {
memset(ret, 0, size);
*dma_handle = virt_to_phys(ret);
}
return ret;
}
static int alpha_noop_supported(struct device *dev, u64 mask)
{
return mask < 0x00ffffffUL ? 0 : 1;
}
const struct dma_map_ops alpha_noop_ops = {
.alloc = alpha_noop_alloc_coherent,
.free = dma_noop_free_coherent,
.map_page = dma_noop_map_page,
.map_sg = dma_noop_map_sg,
.mapping_error = dma_noop_mapping_error,
.dma_supported = alpha_noop_supported,
};
const struct dma_map_ops *dma_ops = &alpha_noop_ops;
EXPORT_SYMBOL(dma_ops);