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s390/dma: Allow per device dma ops

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As virtio-ccw will have dma ops, we can no longer default to the
zPCI ones. Make use of dev_archdata to keep the dma_ops per device.
The pci devices now use that to override the default, and the
default is changed to use the noop ops for everything that does not
specify a device specific one.
To compile without PCI support we will enable HAS_DMA all the time,
via the default config in lib/Kconfig.

Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Reviewed-by: Joerg Roedel <jroedel@suse.de>
Acked-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Acked-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Andy Lutomirski <luto@kernel.org>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Christian Borntraeger
2016-02-02 21:46:34 -08:00
committed by Michael S. Tsirkin
parent 6aca050384
commit e82becfc18
5 changed files with 13 additions and 9 deletions
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6
arch/s390/include/asm/dma-mapping.h
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@@ -11,11 +11,13 @@
#define DMA_ERROR_CODE (~(dma_addr_t) 0x0)
extern struct dma_map_ops s390_dma_ops;
extern struct dma_map_ops s390_pci_dma_ops;
static inline struct dma_map_ops *get_dma_ops(struct device *dev)
{
return &s390_dma_ops;
if (dev && dev->archdata.dma_ops)
return dev->archdata.dma_ops;
return &dma_noop_ops;
}
static inline void dma_cache_sync(struct device *dev, void *vaddr, size_t size,