11648993fSJoerg Roedel #ifndef __LINUX_SWIOTLB_H 21648993fSJoerg Roedel #define __LINUX_SWIOTLB_H 31648993fSJoerg Roedel 41648993fSJoerg Roedel #include <linux/types.h> 51648993fSJoerg Roedel 61648993fSJoerg Roedel struct device; 71648993fSJoerg Roedel struct dma_attrs; 81648993fSJoerg Roedel struct scatterlist; 91648993fSJoerg Roedel 100016fdeeSIan Campbell /* 110016fdeeSIan Campbell * Maximum allowable number of contiguous slabs to map, 120016fdeeSIan Campbell * must be a power of 2. What is the appropriate value ? 130016fdeeSIan Campbell * The complexity of {map,unmap}_single is linearly dependent on this value. 140016fdeeSIan Campbell */ 150016fdeeSIan Campbell #define IO_TLB_SEGSIZE 128 160016fdeeSIan Campbell 170016fdeeSIan Campbell /* 180016fdeeSIan Campbell * log of the size of each IO TLB slab. The number of slabs is command line 190016fdeeSIan Campbell * controllable. 200016fdeeSIan Campbell */ 210016fdeeSIan Campbell #define IO_TLB_SHIFT 11 220016fdeeSIan Campbell 231648993fSJoerg Roedel extern void 241648993fSJoerg Roedel swiotlb_init(void); 251648993fSJoerg Roedel 261648993fSJoerg Roedel extern void 271648993fSJoerg Roedel *swiotlb_alloc_coherent(struct device *hwdev, size_t size, 281648993fSJoerg Roedel dma_addr_t *dma_handle, gfp_t flags); 291648993fSJoerg Roedel 301648993fSJoerg Roedel extern void 311648993fSJoerg Roedel swiotlb_free_coherent(struct device *hwdev, size_t size, 321648993fSJoerg Roedel void *vaddr, dma_addr_t dma_handle); 331648993fSJoerg Roedel 34f98eee8eSFUJITA Tomonori extern dma_addr_t swiotlb_map_page(struct device *dev, struct page *page, 35f98eee8eSFUJITA Tomonori unsigned long offset, size_t size, 36f98eee8eSFUJITA Tomonori enum dma_data_direction dir, 37f98eee8eSFUJITA Tomonori struct dma_attrs *attrs); 38f98eee8eSFUJITA Tomonori extern void swiotlb_unmap_page(struct device *hwdev, dma_addr_t dev_addr, 39f98eee8eSFUJITA Tomonori size_t size, enum dma_data_direction dir, 40f98eee8eSFUJITA Tomonori struct dma_attrs *attrs); 411648993fSJoerg Roedel 421648993fSJoerg Roedel extern int 431648993fSJoerg Roedel swiotlb_map_sg(struct device *hwdev, struct scatterlist *sg, int nents, 441648993fSJoerg Roedel int direction); 451648993fSJoerg Roedel 461648993fSJoerg Roedel extern void 471648993fSJoerg Roedel swiotlb_unmap_sg(struct device *hwdev, struct scatterlist *sg, int nents, 481648993fSJoerg Roedel int direction); 491648993fSJoerg Roedel 501648993fSJoerg Roedel extern int 511648993fSJoerg Roedel swiotlb_map_sg_attrs(struct device *hwdev, struct scatterlist *sgl, int nelems, 52160c1d8eSFUJITA Tomonori enum dma_data_direction dir, struct dma_attrs *attrs); 531648993fSJoerg Roedel 541648993fSJoerg Roedel extern void 551648993fSJoerg Roedel swiotlb_unmap_sg_attrs(struct device *hwdev, struct scatterlist *sgl, 56160c1d8eSFUJITA Tomonori int nelems, enum dma_data_direction dir, 57160c1d8eSFUJITA Tomonori struct dma_attrs *attrs); 581648993fSJoerg Roedel 591648993fSJoerg Roedel extern void 601648993fSJoerg Roedel swiotlb_sync_single_for_cpu(struct device *hwdev, dma_addr_t dev_addr, 61160c1d8eSFUJITA Tomonori size_t size, enum dma_data_direction dir); 621648993fSJoerg Roedel 631648993fSJoerg Roedel extern void 641648993fSJoerg Roedel swiotlb_sync_sg_for_cpu(struct device *hwdev, struct scatterlist *sg, 65160c1d8eSFUJITA Tomonori int nelems, enum dma_data_direction dir); 661648993fSJoerg Roedel 671648993fSJoerg Roedel extern void 681648993fSJoerg Roedel swiotlb_sync_single_for_device(struct device *hwdev, dma_addr_t dev_addr, 69160c1d8eSFUJITA Tomonori size_t size, enum dma_data_direction dir); 701648993fSJoerg Roedel 711648993fSJoerg Roedel extern void 721648993fSJoerg Roedel swiotlb_sync_sg_for_device(struct device *hwdev, struct scatterlist *sg, 73160c1d8eSFUJITA Tomonori int nelems, enum dma_data_direction dir); 741648993fSJoerg Roedel 751648993fSJoerg Roedel extern void 761648993fSJoerg Roedel swiotlb_sync_single_range_for_cpu(struct device *hwdev, dma_addr_t dev_addr, 77160c1d8eSFUJITA Tomonori unsigned long offset, size_t size, 78160c1d8eSFUJITA Tomonori enum dma_data_direction dir); 791648993fSJoerg Roedel 801648993fSJoerg Roedel extern void 811648993fSJoerg Roedel swiotlb_sync_single_range_for_device(struct device *hwdev, dma_addr_t dev_addr, 821648993fSJoerg Roedel unsigned long offset, size_t size, 83160c1d8eSFUJITA Tomonori enum dma_data_direction dir); 841648993fSJoerg Roedel 851648993fSJoerg Roedel extern int 861648993fSJoerg Roedel swiotlb_dma_mapping_error(struct device *hwdev, dma_addr_t dma_addr); 871648993fSJoerg Roedel 881648993fSJoerg Roedel extern int 891648993fSJoerg Roedel swiotlb_dma_supported(struct device *hwdev, u64 mask); 901648993fSJoerg Roedel 91*5740afdbSFUJITA Tomonori #ifdef CONFIG_SWIOTLB 92*5740afdbSFUJITA Tomonori extern void __init swiotlb_free(void); 93*5740afdbSFUJITA Tomonori #else 94*5740afdbSFUJITA Tomonori static inline void swiotlb_free(void) { } 95*5740afdbSFUJITA Tomonori #endif 96*5740afdbSFUJITA Tomonori 971648993fSJoerg Roedel #endif /* __LINUX_SWIOTLB_H */ 98