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 106959450eSFUJITA Tomonori extern int swiotlb_force; 116959450eSFUJITA Tomonori 120016fdeeSIan Campbell /* 130016fdeeSIan Campbell * Maximum allowable number of contiguous slabs to map, 140016fdeeSIan Campbell * must be a power of 2. What is the appropriate value ? 150016fdeeSIan Campbell * The complexity of {map,unmap}_single is linearly dependent on this value. 160016fdeeSIan Campbell */ 170016fdeeSIan Campbell #define IO_TLB_SEGSIZE 128 180016fdeeSIan Campbell 190016fdeeSIan Campbell /* 200016fdeeSIan Campbell * log of the size of each IO TLB slab. The number of slabs is command line 210016fdeeSIan Campbell * controllable. 220016fdeeSIan Campbell */ 230016fdeeSIan Campbell #define IO_TLB_SHIFT 11 240016fdeeSIan Campbell 25ad32e8cbSFUJITA Tomonori extern void swiotlb_init(int verbose); 26abbceff7SFUJITA Tomonori extern void swiotlb_init_with_tbl(char *tlb, unsigned long nslabs, int verbose); 271648993fSJoerg Roedel 281648993fSJoerg Roedel extern void 291648993fSJoerg Roedel *swiotlb_alloc_coherent(struct device *hwdev, size_t size, 301648993fSJoerg Roedel dma_addr_t *dma_handle, gfp_t flags); 311648993fSJoerg Roedel 321648993fSJoerg Roedel extern void 331648993fSJoerg Roedel swiotlb_free_coherent(struct device *hwdev, size_t size, 341648993fSJoerg Roedel void *vaddr, dma_addr_t dma_handle); 351648993fSJoerg Roedel 36f98eee8eSFUJITA Tomonori extern dma_addr_t swiotlb_map_page(struct device *dev, struct page *page, 37f98eee8eSFUJITA Tomonori unsigned long offset, size_t size, 38f98eee8eSFUJITA Tomonori enum dma_data_direction dir, 39f98eee8eSFUJITA Tomonori struct dma_attrs *attrs); 40f98eee8eSFUJITA Tomonori extern void swiotlb_unmap_page(struct device *hwdev, dma_addr_t dev_addr, 41f98eee8eSFUJITA Tomonori size_t size, enum dma_data_direction dir, 42f98eee8eSFUJITA Tomonori struct dma_attrs *attrs); 431648993fSJoerg Roedel 441648993fSJoerg Roedel extern int 451648993fSJoerg Roedel swiotlb_map_sg(struct device *hwdev, struct scatterlist *sg, int nents, 46*22d48269SKonrad Rzeszutek Wilk enum dma_data_direction dir); 471648993fSJoerg Roedel 481648993fSJoerg Roedel extern void 491648993fSJoerg Roedel swiotlb_unmap_sg(struct device *hwdev, struct scatterlist *sg, int nents, 50*22d48269SKonrad Rzeszutek Wilk enum dma_data_direction dir); 511648993fSJoerg Roedel 521648993fSJoerg Roedel extern int 531648993fSJoerg Roedel swiotlb_map_sg_attrs(struct device *hwdev, struct scatterlist *sgl, int nelems, 54160c1d8eSFUJITA Tomonori enum dma_data_direction dir, struct dma_attrs *attrs); 551648993fSJoerg Roedel 561648993fSJoerg Roedel extern void 571648993fSJoerg Roedel swiotlb_unmap_sg_attrs(struct device *hwdev, struct scatterlist *sgl, 58160c1d8eSFUJITA Tomonori int nelems, enum dma_data_direction dir, 59160c1d8eSFUJITA Tomonori struct dma_attrs *attrs); 601648993fSJoerg Roedel 611648993fSJoerg Roedel extern void 621648993fSJoerg Roedel swiotlb_sync_single_for_cpu(struct device *hwdev, dma_addr_t dev_addr, 63160c1d8eSFUJITA Tomonori size_t size, enum dma_data_direction dir); 641648993fSJoerg Roedel 651648993fSJoerg Roedel extern void 661648993fSJoerg Roedel swiotlb_sync_sg_for_cpu(struct device *hwdev, struct scatterlist *sg, 67160c1d8eSFUJITA Tomonori int nelems, enum dma_data_direction dir); 681648993fSJoerg Roedel 691648993fSJoerg Roedel extern void 701648993fSJoerg Roedel swiotlb_sync_single_for_device(struct device *hwdev, dma_addr_t dev_addr, 71160c1d8eSFUJITA Tomonori size_t size, enum dma_data_direction dir); 721648993fSJoerg Roedel 731648993fSJoerg Roedel extern void 741648993fSJoerg Roedel swiotlb_sync_sg_for_device(struct device *hwdev, struct scatterlist *sg, 75160c1d8eSFUJITA Tomonori int nelems, enum dma_data_direction dir); 761648993fSJoerg Roedel 771648993fSJoerg Roedel extern int 781648993fSJoerg Roedel swiotlb_dma_mapping_error(struct device *hwdev, dma_addr_t dma_addr); 791648993fSJoerg Roedel 801648993fSJoerg Roedel extern int 811648993fSJoerg Roedel swiotlb_dma_supported(struct device *hwdev, u64 mask); 821648993fSJoerg Roedel 835740afdbSFUJITA Tomonori #ifdef CONFIG_SWIOTLB 845740afdbSFUJITA Tomonori extern void __init swiotlb_free(void); 855740afdbSFUJITA Tomonori #else 865740afdbSFUJITA Tomonori static inline void swiotlb_free(void) { } 875740afdbSFUJITA Tomonori #endif 885740afdbSFUJITA Tomonori 89ad32e8cbSFUJITA Tomonori extern void swiotlb_print_info(void); 901648993fSJoerg Roedel #endif /* __LINUX_SWIOTLB_H */ 91