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| author | Michael Schmitz <schmitzmic@gmail.com> | 2018-03-03 12:04:13 +1300 |
|---|---|---|
| committer | Geert Uytterhoeven <geert@linux-m68k.org> | 2018-03-19 10:26:46 +0100 |
| commit | 55496d3fe2acd1a365c43cbd613a20ecd4d74395 (patch) | |
| tree | 2347dfc6a9cfa5b3a9fc553ab1a89469ec5296ce /drivers/zorro | |
| parent | 6efe2649a769bac00dbaee5214c49d80c86de2c9 (diff) | |
| download | linux-55496d3fe2acd1a365c43cbd613a20ecd4d74395.tar.bz2 | |
zorro: Set up z->dev.dma_mask for the DMA API
The generic DMA API uses dev->dma_mask to check the DMA addressable
memory bitmask, and warns if no mask is set or even allocated.
Set z->dev.dma_coherent_mask on Zorro bus scan, and make z->dev.dma_mask
to point to z->dev.dma_coherent_mask so device drivers that need DMA have
everything set up to avoid warnings from dma_alloc_coherent(). Drivers can
still use dma_set_mask_and_coherent() to explicitly set their DMA bit mask.
Signed-off-by: Michael Schmitz <schmitzmic@gmail.com>
[geert: Handle Zorro II with 24-bit address space]
Acked-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Diffstat (limited to 'drivers/zorro')
| -rw-r--r-- | drivers/zorro/zorro.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/zorro/zorro.c b/drivers/zorro/zorro.c index cc1b1ac57d61..47728477297e 100644 --- a/drivers/zorro/zorro.c +++ b/drivers/zorro/zorro.c @@ -16,6 +16,7 @@ #include <linux/bitops.h> #include <linux/string.h> #include <linux/platform_device.h> +#include <linux/dma-mapping.h> #include <linux/slab.h> #include <asm/byteorder.h> @@ -185,6 +186,17 @@ static int __init amiga_zorro_probe(struct platform_device *pdev) z->dev.parent = &bus->dev; z->dev.bus = &zorro_bus_type; z->dev.id = i; + switch (z->rom.er_Type & ERT_TYPEMASK) { + case ERT_ZORROIII: + z->dev.coherent_dma_mask = DMA_BIT_MASK(32); + break; + + case ERT_ZORROII: + default: + z->dev.coherent_dma_mask = DMA_BIT_MASK(24); + break; + } + z->dev.dma_mask = &z->dev.coherent_dma_mask; } /* ... then register them */ |