powerpc: Remove addr_needs_map in struct dma_mapping_ops

This patch adds max_direct_dma_addr to struct dev_archdata to remove
addr_needs_map in struct dma_mapping_ops. It also converts
dma_capable() to use max_direct_dma_addr.

max_direct_dma_addr is initialized in pci_dma_dev_setup_swiotlb(),
called via ppc_md.pci_dma_dev_setup hook.

For further information:
http://marc.info/?t=124719060200001&r=1&w=2

Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Acked-by: Becky Bruce <beckyb@kernel.crashing.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

1 files changed, 4 insertions, 4 deletions

diff --git a/arch/powerpc/include/asm/dma-mapping.h b/arch/powerpc/include/asm/dma-mapping.h
index 0c34371ec49c..1765c379138a 100644
--- a/arch/powerpc/include/asm/dma-mapping.h
+++ b/arch/powerpc/include/asm/dma-mapping.h
@@ -87,8 +87,6 @@ struct dma_mapping_ops {
                                 dma_addr_t dma_address, size_t size,
                                 enum dma_data_direction direction,
                                 struct dma_attrs *attrs);
-        int             (*addr_needs_map)(struct device *dev, dma_addr_t addr,
-                                size_t size);
 #ifdef CONFIG_PPC_NEED_DMA_SYNC_OPS
         void            (*sync_single_range_for_cpu)(struct device *hwdev,
                                 dma_addr_t dma_handle, unsigned long offset,
@@ -426,10 +424,12 @@ static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
 
 static inline bool dma_capable(struct device *dev, dma_addr_t addr, size_t size)
 {
-        struct dma_mapping_ops *ops = get_dma_ops(dev);
+#ifdef CONFIG_SWIOTLB
+        struct dev_archdata *sd = &dev->archdata;
 
-        if (ops->addr_needs_map && ops->addr_needs_map(dev, addr, size))
+        if (sd->max_direct_dma_addr && addr + size > sd->max_direct_dma_addr)
                 return 0;
+#endif
 
         if (!dev->dma_mask)
                 return 0;