diff options
Diffstat (limited to 'arch/powerpc/include/asm/iommu.h')
| -rw-r--r-- | arch/powerpc/include/asm/iommu.h | 22 |
1 files changed, 18 insertions, 4 deletions
diff --git a/arch/powerpc/include/asm/iommu.h b/arch/powerpc/include/asm/iommu.h index 489133cf7c5e..4636734604d7 100644 --- a/arch/powerpc/include/asm/iommu.h +++ b/arch/powerpc/include/asm/iommu.h @@ -45,13 +45,29 @@ extern int iommu_is_off; extern int iommu_force_on; struct iommu_table_ops { + /* + * When called with direction==DMA_NONE, it is equal to clear(). + * uaddr is a linear map address. + */ int (*set)(struct iommu_table *tbl, long index, long npages, unsigned long uaddr, enum dma_data_direction direction, struct dma_attrs *attrs); +#ifdef CONFIG_IOMMU_API + /* + * Exchanges existing TCE with new TCE plus direction bits; + * returns old TCE and DMA direction mask. + * @tce is a physical address. + */ + int (*exchange)(struct iommu_table *tbl, + long index, + unsigned long *hpa, + enum dma_data_direction *direction); +#endif void (*clear)(struct iommu_table *tbl, long index, long npages); + /* get() returns a physical address */ unsigned long (*get)(struct iommu_table *tbl, long index); void (*flush)(struct iommu_table *tbl); }; @@ -153,6 +169,8 @@ extern void iommu_register_group(struct iommu_table_group *table_group, extern int iommu_add_device(struct device *dev); extern void iommu_del_device(struct device *dev); extern int __init tce_iommu_bus_notifier_init(void); +extern long iommu_tce_xchg(struct iommu_table *tbl, unsigned long entry, + unsigned long *hpa, enum dma_data_direction *direction); #else static inline void iommu_register_group(struct iommu_table_group *table_group, int pci_domain_number, @@ -225,10 +243,6 @@ extern int iommu_tce_clear_param_check(struct iommu_table *tbl, unsigned long npages); extern int iommu_tce_put_param_check(struct iommu_table *tbl, unsigned long ioba, unsigned long tce); -extern int iommu_tce_build(struct iommu_table *tbl, unsigned long entry, - unsigned long hwaddr, enum dma_data_direction direction); -extern unsigned long iommu_clear_tce(struct iommu_table *tbl, - unsigned long entry); extern void iommu_flush_tce(struct iommu_table *tbl); extern int iommu_take_ownership(struct iommu_table *tbl); |