To support "hybrid" DMA ops in a subsequent patch, we will need both
a direct DMA offset and an iommu pointer. Those are currently exclusive
(a union), so change them to be separate fields.
While there, also type iommu_table_base properly and make exist only
on CONFIG_PPC64 since it's not referenced on 32-bit at all.
Signed-off-by: Benjamin Herrenschmidt <b...@kernel.crashing.org>
---
arch/powerpc/include/asm/device.h | 15 +++++++++------
arch/powerpc/include/asm/dma-mapping.h | 4 ++--
arch/powerpc/include/asm/iommu.h | 31 +++++++++++++++++++++++++------
3 files changed, 36 insertions(+), 14 deletions(-)
diff --git a/arch/powerpc/include/asm/device.h
b/arch/powerpc/include/asm/device.h
index 9f1371b..9ce2199 100644
--- a/arch/powerpc/include/asm/device.h
+++ b/arch/powerpc/include/asm/device.h
@@ -10,6 +10,7 @@ struct dma_map_ops;
struct device_node;
#ifdef CONFIG_PPC64
struct pci_dn;
+struct iommu_table;
#endif
/*
@@ -23,13 +24,15 @@ struct dev_archdata {
struct dma_map_ops *dma_ops;
/*
- * When an iommu is in use, dma_data is used as a ptr to the base of the
- * iommu_table. Otherwise, it is a simple numerical offset.
+ * These two used to be a union. However, with the hybrid ops we need
+ * both so here we store both a DMA offset for direct mappings and
+ * an iommu_table for remapped DMA.
*/
- union {
- dma_addr_t dma_offset;
- void *iommu_table_base;
- } dma_data;
+ dma_addr_t dma_offset;
+
+#ifdef CONFIG_PPC64
+ struct iommu_table *iommu_table_base;
+#endif
#ifdef CONFIG_IOMMU_API
void *iommu_domain;
diff --git a/arch/powerpc/include/asm/dma-mapping.h
b/arch/powerpc/include/asm/dma-mapping.h
index 894d538..35b9965 100644
--- a/arch/powerpc/include/asm/dma-mapping.h
+++ b/arch/powerpc/include/asm/dma-mapping.h
@@ -106,7 +106,7 @@ static inline void set_dma_ops(struct device *dev, struct
dma_map_ops *ops)
static inline dma_addr_t get_dma_offset(struct device *dev)
{
if (dev)
- return dev->archdata.dma_data.dma_offset;
+ return dev->archdata.dma_offset;
return PCI_DRAM_OFFSET;
}
@@ -114,7 +114,7 @@ static inline dma_addr_t get_dma_offset(struct device *dev)
static inline void set_dma_offset(struct device *dev, dma_addr_t off)
{
if (dev)
- dev->archdata.dma_data.dma_offset = off;
+ dev->archdata.dma_offset = off;
}
/* this will be removed soon */
diff --git a/arch/powerpc/include/asm/iommu.h b/arch/powerpc/include/asm/iommu.h
index e2abbe8..e67e678 100644
--- a/arch/powerpc/include/asm/iommu.h
+++ b/arch/powerpc/include/asm/iommu.h
@@ -93,16 +93,21 @@ int get_iommu_order(unsigned long size, struct iommu_table
*tbl)
struct scatterlist;
-static inline void set_iommu_table_base(struct device *dev, void *base)
+#ifdef CONFIG_PPC64
+
+static inline void set_iommu_table_base(struct device *dev,
+ struct iommu_table *base)
{
- dev->archdata.dma_data.iommu_table_base = base;
+ dev->archdata.iommu_table_base = base;
}
static inline void *get_iommu_table_base(struct device *dev)
{
- return dev->archdata.dma_data.iommu_table_base;
+ return dev->archdata.iommu_table_base;
}
+extern int dma_iommu_dma_supported(struct device *dev, u64 mask);
+
/* Frees table for an individual device node */
extern void iommu_free_table(struct iommu_table *tbl, const char *node_name);
@@ -146,6 +151,20 @@ static inline void set_iommu_table_base_and_group(struct
device *dev,
iommu_add_device(dev);
}
+#else
+
+static inline void *get_iommu_table_base(struct device *dev)
+{
+ return NULL;
+}
+
+static inline int dma_iommu_dma_supported(struct device *dev, u64 mask)
+{
+ return 0;
+}
+
+#endif /* CONFIG_PPC64 */
+
extern int ppc_iommu_map_sg(struct device *dev, struct iommu_table *tbl,
struct scatterlist *sglist, int nelems,
unsigned long mask,
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