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 28*d7ef1533SKonrad Rzeszutek Wilk /* 29*d7ef1533SKonrad Rzeszutek Wilk * Enumeration for sync targets 30*d7ef1533SKonrad Rzeszutek Wilk */ 31*d7ef1533SKonrad Rzeszutek Wilk enum dma_sync_target { 32*d7ef1533SKonrad Rzeszutek Wilk SYNC_FOR_CPU = 0, 33*d7ef1533SKonrad Rzeszutek Wilk SYNC_FOR_DEVICE = 1, 34*d7ef1533SKonrad Rzeszutek Wilk }; 35*d7ef1533SKonrad Rzeszutek Wilk extern void *swiotlb_tbl_map_single(struct device *hwdev, dma_addr_t tbl_dma_addr, 36*d7ef1533SKonrad Rzeszutek Wilk phys_addr_t phys, size_t size, 37*d7ef1533SKonrad Rzeszutek Wilk enum dma_data_direction dir); 38*d7ef1533SKonrad Rzeszutek Wilk 39*d7ef1533SKonrad Rzeszutek Wilk extern void swiotlb_tbl_unmap_single(struct device *hwdev, char *dma_addr, 40*d7ef1533SKonrad Rzeszutek Wilk size_t size, enum dma_data_direction dir); 41*d7ef1533SKonrad Rzeszutek Wilk 42*d7ef1533SKonrad Rzeszutek Wilk extern void swiotlb_tbl_sync_single(struct device *hwdev, char *dma_addr, 43*d7ef1533SKonrad Rzeszutek Wilk size_t size, enum dma_data_direction dir, 44*d7ef1533SKonrad Rzeszutek Wilk enum dma_sync_target target); 45*d7ef1533SKonrad Rzeszutek Wilk 46*d7ef1533SKonrad Rzeszutek Wilk /* Accessory functions. */ 47*d7ef1533SKonrad Rzeszutek Wilk extern void swiotlb_bounce(phys_addr_t phys, char *dma_addr, size_t size, 48*d7ef1533SKonrad Rzeszutek Wilk enum dma_data_direction dir); 49*d7ef1533SKonrad Rzeszutek Wilk 501648993fSJoerg Roedel extern void 511648993fSJoerg Roedel *swiotlb_alloc_coherent(struct device *hwdev, size_t size, 521648993fSJoerg Roedel dma_addr_t *dma_handle, gfp_t flags); 531648993fSJoerg Roedel 541648993fSJoerg Roedel extern void 551648993fSJoerg Roedel swiotlb_free_coherent(struct device *hwdev, size_t size, 561648993fSJoerg Roedel void *vaddr, dma_addr_t dma_handle); 571648993fSJoerg Roedel 58f98eee8eSFUJITA Tomonori extern dma_addr_t swiotlb_map_page(struct device *dev, struct page *page, 59f98eee8eSFUJITA Tomonori unsigned long offset, size_t size, 60f98eee8eSFUJITA Tomonori enum dma_data_direction dir, 61f98eee8eSFUJITA Tomonori struct dma_attrs *attrs); 62f98eee8eSFUJITA Tomonori extern void swiotlb_unmap_page(struct device *hwdev, dma_addr_t dev_addr, 63f98eee8eSFUJITA Tomonori size_t size, enum dma_data_direction dir, 64f98eee8eSFUJITA Tomonori struct dma_attrs *attrs); 651648993fSJoerg Roedel 661648993fSJoerg Roedel extern int 671648993fSJoerg Roedel swiotlb_map_sg(struct device *hwdev, struct scatterlist *sg, int nents, 6822d48269SKonrad Rzeszutek Wilk enum dma_data_direction dir); 691648993fSJoerg Roedel 701648993fSJoerg Roedel extern void 711648993fSJoerg Roedel swiotlb_unmap_sg(struct device *hwdev, struct scatterlist *sg, int nents, 7222d48269SKonrad Rzeszutek Wilk enum dma_data_direction dir); 731648993fSJoerg Roedel 741648993fSJoerg Roedel extern int 751648993fSJoerg Roedel swiotlb_map_sg_attrs(struct device *hwdev, struct scatterlist *sgl, int nelems, 76160c1d8eSFUJITA Tomonori enum dma_data_direction dir, struct dma_attrs *attrs); 771648993fSJoerg Roedel 781648993fSJoerg Roedel extern void 791648993fSJoerg Roedel swiotlb_unmap_sg_attrs(struct device *hwdev, struct scatterlist *sgl, 80160c1d8eSFUJITA Tomonori int nelems, enum dma_data_direction dir, 81160c1d8eSFUJITA Tomonori struct dma_attrs *attrs); 821648993fSJoerg Roedel 831648993fSJoerg Roedel extern void 841648993fSJoerg Roedel swiotlb_sync_single_for_cpu(struct device *hwdev, dma_addr_t dev_addr, 85160c1d8eSFUJITA Tomonori size_t size, enum dma_data_direction dir); 861648993fSJoerg Roedel 871648993fSJoerg Roedel extern void 881648993fSJoerg Roedel swiotlb_sync_sg_for_cpu(struct device *hwdev, struct scatterlist *sg, 89160c1d8eSFUJITA Tomonori int nelems, enum dma_data_direction dir); 901648993fSJoerg Roedel 911648993fSJoerg Roedel extern void 921648993fSJoerg Roedel swiotlb_sync_single_for_device(struct device *hwdev, dma_addr_t dev_addr, 93160c1d8eSFUJITA Tomonori size_t size, enum dma_data_direction dir); 941648993fSJoerg Roedel 951648993fSJoerg Roedel extern void 961648993fSJoerg Roedel swiotlb_sync_sg_for_device(struct device *hwdev, struct scatterlist *sg, 97160c1d8eSFUJITA Tomonori int nelems, enum dma_data_direction 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 1055740afdbSFUJITA Tomonori #ifdef CONFIG_SWIOTLB 1065740afdbSFUJITA Tomonori extern void __init swiotlb_free(void); 1075740afdbSFUJITA Tomonori #else 1085740afdbSFUJITA Tomonori static inline void swiotlb_free(void) { } 1095740afdbSFUJITA Tomonori #endif 1105740afdbSFUJITA Tomonori 111ad32e8cbSFUJITA Tomonori extern void swiotlb_print_info(void); 1121648993fSJoerg Roedel #endif /* __LINUX_SWIOTLB_H */ 113