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 /* 190016fdeeSIan Campbell * log of the size of each IO TLB slab. The number of slabs is command line 200016fdeeSIan Campbell * controllable. 210016fdeeSIan Campbell */ 220016fdeeSIan Campbell #define IO_TLB_SHIFT 11 230016fdeeSIan Campbell 241648993fSJoerg Roedel extern void 251648993fSJoerg Roedel swiotlb_init(void); 261648993fSJoerg Roedel 278c5df16bSJeremy Fitzhardinge extern void *swiotlb_alloc_boot(size_t bytes, unsigned long nslabs); 288c5df16bSJeremy Fitzhardinge extern void *swiotlb_alloc(unsigned order, unsigned long nslabs); 298c5df16bSJeremy Fitzhardinge 3070a7d3ccSJeremy Fitzhardinge extern dma_addr_t swiotlb_phys_to_bus(struct device *hwdev, 3170a7d3ccSJeremy Fitzhardinge phys_addr_t address); 32e08e1f7aSIan Campbell extern phys_addr_t swiotlb_bus_to_phys(dma_addr_t address); 33e08e1f7aSIan Campbell 34b81ea27bSIan Campbell extern int swiotlb_arch_range_needs_mapping(void *ptr, size_t size); 35b81ea27bSIan Campbell 361648993fSJoerg Roedel extern void 371648993fSJoerg Roedel *swiotlb_alloc_coherent(struct device *hwdev, size_t size, 381648993fSJoerg Roedel dma_addr_t *dma_handle, gfp_t flags); 391648993fSJoerg Roedel 401648993fSJoerg Roedel extern void 411648993fSJoerg Roedel swiotlb_free_coherent(struct device *hwdev, size_t size, 421648993fSJoerg Roedel void *vaddr, dma_addr_t dma_handle); 431648993fSJoerg Roedel 44*f98eee8eSFUJITA Tomonori extern dma_addr_t swiotlb_map_page(struct device *dev, struct page *page, 45*f98eee8eSFUJITA Tomonori unsigned long offset, size_t size, 46*f98eee8eSFUJITA Tomonori enum dma_data_direction dir, 47*f98eee8eSFUJITA Tomonori struct dma_attrs *attrs); 48*f98eee8eSFUJITA Tomonori extern void swiotlb_unmap_page(struct device *hwdev, dma_addr_t dev_addr, 49*f98eee8eSFUJITA Tomonori size_t size, enum dma_data_direction dir, 50*f98eee8eSFUJITA Tomonori struct dma_attrs *attrs); 511648993fSJoerg Roedel 521648993fSJoerg Roedel extern int 531648993fSJoerg Roedel swiotlb_map_sg(struct device *hwdev, struct scatterlist *sg, int nents, 541648993fSJoerg Roedel int direction); 551648993fSJoerg Roedel 561648993fSJoerg Roedel extern void 571648993fSJoerg Roedel swiotlb_unmap_sg(struct device *hwdev, struct scatterlist *sg, int nents, 581648993fSJoerg Roedel int direction); 591648993fSJoerg Roedel 601648993fSJoerg Roedel extern int 611648993fSJoerg Roedel swiotlb_map_sg_attrs(struct device *hwdev, struct scatterlist *sgl, int nelems, 62160c1d8eSFUJITA Tomonori enum dma_data_direction dir, struct dma_attrs *attrs); 631648993fSJoerg Roedel 641648993fSJoerg Roedel extern void 651648993fSJoerg Roedel swiotlb_unmap_sg_attrs(struct device *hwdev, struct scatterlist *sgl, 66160c1d8eSFUJITA Tomonori int nelems, enum dma_data_direction dir, 67160c1d8eSFUJITA Tomonori struct dma_attrs *attrs); 681648993fSJoerg Roedel 691648993fSJoerg Roedel extern void 701648993fSJoerg Roedel swiotlb_sync_single_for_cpu(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_cpu(struct device *hwdev, struct scatterlist *sg, 75160c1d8eSFUJITA Tomonori int nelems, enum dma_data_direction dir); 761648993fSJoerg Roedel 771648993fSJoerg Roedel extern void 781648993fSJoerg Roedel swiotlb_sync_single_for_device(struct device *hwdev, dma_addr_t dev_addr, 79160c1d8eSFUJITA Tomonori size_t size, enum dma_data_direction dir); 801648993fSJoerg Roedel 811648993fSJoerg Roedel extern void 821648993fSJoerg Roedel swiotlb_sync_sg_for_device(struct device *hwdev, struct scatterlist *sg, 83160c1d8eSFUJITA Tomonori int nelems, enum dma_data_direction dir); 841648993fSJoerg Roedel 851648993fSJoerg Roedel extern void 861648993fSJoerg Roedel swiotlb_sync_single_range_for_cpu(struct device *hwdev, dma_addr_t dev_addr, 87160c1d8eSFUJITA Tomonori unsigned long offset, size_t size, 88160c1d8eSFUJITA Tomonori enum dma_data_direction dir); 891648993fSJoerg Roedel 901648993fSJoerg Roedel extern void 911648993fSJoerg Roedel swiotlb_sync_single_range_for_device(struct device *hwdev, dma_addr_t dev_addr, 921648993fSJoerg Roedel unsigned long offset, size_t size, 93160c1d8eSFUJITA Tomonori enum dma_data_direction dir); 941648993fSJoerg Roedel 951648993fSJoerg Roedel extern int 961648993fSJoerg Roedel swiotlb_dma_mapping_error(struct device *hwdev, dma_addr_t dma_addr); 971648993fSJoerg Roedel 981648993fSJoerg Roedel extern int 991648993fSJoerg Roedel swiotlb_dma_supported(struct device *hwdev, u64 mask); 1001648993fSJoerg Roedel 1011648993fSJoerg Roedel #endif /* __LINUX_SWIOTLB_H */ 102