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 30e08e1f7aSIan Campbell extern dma_addr_t swiotlb_phys_to_bus(phys_addr_t address); 31e08e1f7aSIan Campbell extern phys_addr_t swiotlb_bus_to_phys(dma_addr_t address); 32e08e1f7aSIan Campbell 33*b81ea27bSIan Campbell extern int swiotlb_arch_range_needs_mapping(void *ptr, size_t size); 34*b81ea27bSIan Campbell 351648993fSJoerg Roedel extern void 361648993fSJoerg Roedel *swiotlb_alloc_coherent(struct device *hwdev, size_t size, 371648993fSJoerg Roedel dma_addr_t *dma_handle, gfp_t flags); 381648993fSJoerg Roedel 391648993fSJoerg Roedel extern void 401648993fSJoerg Roedel swiotlb_free_coherent(struct device *hwdev, size_t size, 411648993fSJoerg Roedel void *vaddr, dma_addr_t dma_handle); 421648993fSJoerg Roedel 431648993fSJoerg Roedel extern dma_addr_t 441648993fSJoerg Roedel swiotlb_map_single(struct device *hwdev, void *ptr, size_t size, int dir); 451648993fSJoerg Roedel 461648993fSJoerg Roedel extern void 471648993fSJoerg Roedel swiotlb_unmap_single(struct device *hwdev, dma_addr_t dev_addr, 481648993fSJoerg Roedel size_t size, int dir); 491648993fSJoerg Roedel 501648993fSJoerg Roedel extern dma_addr_t 511648993fSJoerg Roedel swiotlb_map_single_attrs(struct device *hwdev, void *ptr, size_t size, 521648993fSJoerg Roedel int dir, struct dma_attrs *attrs); 531648993fSJoerg Roedel 541648993fSJoerg Roedel extern void 551648993fSJoerg Roedel swiotlb_unmap_single_attrs(struct device *hwdev, dma_addr_t dev_addr, 561648993fSJoerg Roedel size_t size, int dir, struct dma_attrs *attrs); 571648993fSJoerg Roedel 581648993fSJoerg Roedel extern int 591648993fSJoerg Roedel swiotlb_map_sg(struct device *hwdev, struct scatterlist *sg, int nents, 601648993fSJoerg Roedel int direction); 611648993fSJoerg Roedel 621648993fSJoerg Roedel extern void 631648993fSJoerg Roedel swiotlb_unmap_sg(struct device *hwdev, struct scatterlist *sg, int nents, 641648993fSJoerg Roedel int direction); 651648993fSJoerg Roedel 661648993fSJoerg Roedel extern int 671648993fSJoerg Roedel swiotlb_map_sg_attrs(struct device *hwdev, struct scatterlist *sgl, int nelems, 681648993fSJoerg Roedel int dir, struct dma_attrs *attrs); 691648993fSJoerg Roedel 701648993fSJoerg Roedel extern void 711648993fSJoerg Roedel swiotlb_unmap_sg_attrs(struct device *hwdev, struct scatterlist *sgl, 721648993fSJoerg Roedel int nelems, int dir, struct dma_attrs *attrs); 731648993fSJoerg Roedel 741648993fSJoerg Roedel extern void 751648993fSJoerg Roedel swiotlb_sync_single_for_cpu(struct device *hwdev, dma_addr_t dev_addr, 761648993fSJoerg Roedel size_t size, int dir); 771648993fSJoerg Roedel 781648993fSJoerg Roedel extern void 791648993fSJoerg Roedel swiotlb_sync_sg_for_cpu(struct device *hwdev, struct scatterlist *sg, 801648993fSJoerg Roedel int nelems, int dir); 811648993fSJoerg Roedel 821648993fSJoerg Roedel extern void 831648993fSJoerg Roedel swiotlb_sync_single_for_device(struct device *hwdev, dma_addr_t dev_addr, 841648993fSJoerg Roedel size_t size, int dir); 851648993fSJoerg Roedel 861648993fSJoerg Roedel extern void 871648993fSJoerg Roedel swiotlb_sync_sg_for_device(struct device *hwdev, struct scatterlist *sg, 881648993fSJoerg Roedel int nelems, int dir); 891648993fSJoerg Roedel 901648993fSJoerg Roedel extern void 911648993fSJoerg Roedel swiotlb_sync_single_range_for_cpu(struct device *hwdev, dma_addr_t dev_addr, 921648993fSJoerg Roedel unsigned long offset, size_t size, int dir); 931648993fSJoerg Roedel 941648993fSJoerg Roedel extern void 951648993fSJoerg Roedel swiotlb_sync_single_range_for_device(struct device *hwdev, dma_addr_t dev_addr, 961648993fSJoerg Roedel unsigned long offset, size_t size, 971648993fSJoerg Roedel int dir); 981648993fSJoerg Roedel 991648993fSJoerg Roedel extern int 1001648993fSJoerg Roedel swiotlb_dma_mapping_error(struct device *hwdev, dma_addr_t dma_addr); 1011648993fSJoerg Roedel 1021648993fSJoerg Roedel extern int 1031648993fSJoerg Roedel swiotlb_dma_supported(struct device *hwdev, u64 mask); 1041648993fSJoerg Roedel 1051648993fSJoerg Roedel #endif /* __LINUX_SWIOTLB_H */ 106