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); 27*f21ffe9fSKonrad Rzeszutek Wilk extern unsigned long swiotlb_nr_tbl(void); 281648993fSJoerg Roedel 29d7ef1533SKonrad Rzeszutek Wilk /* 30d7ef1533SKonrad Rzeszutek Wilk * Enumeration for sync targets 31d7ef1533SKonrad Rzeszutek Wilk */ 32d7ef1533SKonrad Rzeszutek Wilk enum dma_sync_target { 33d7ef1533SKonrad Rzeszutek Wilk SYNC_FOR_CPU = 0, 34d7ef1533SKonrad Rzeszutek Wilk SYNC_FOR_DEVICE = 1, 35d7ef1533SKonrad Rzeszutek Wilk }; 36d7ef1533SKonrad Rzeszutek Wilk extern void *swiotlb_tbl_map_single(struct device *hwdev, dma_addr_t tbl_dma_addr, 37d7ef1533SKonrad Rzeszutek Wilk phys_addr_t phys, size_t size, 38d7ef1533SKonrad Rzeszutek Wilk enum dma_data_direction dir); 39d7ef1533SKonrad Rzeszutek Wilk 40d7ef1533SKonrad Rzeszutek Wilk extern void swiotlb_tbl_unmap_single(struct device *hwdev, char *dma_addr, 41d7ef1533SKonrad Rzeszutek Wilk size_t size, enum dma_data_direction dir); 42d7ef1533SKonrad Rzeszutek Wilk 43d7ef1533SKonrad Rzeszutek Wilk extern void swiotlb_tbl_sync_single(struct device *hwdev, char *dma_addr, 44d7ef1533SKonrad Rzeszutek Wilk size_t size, enum dma_data_direction dir, 45d7ef1533SKonrad Rzeszutek Wilk enum dma_sync_target target); 46d7ef1533SKonrad Rzeszutek Wilk 47d7ef1533SKonrad Rzeszutek Wilk /* Accessory functions. */ 48d7ef1533SKonrad Rzeszutek Wilk extern void swiotlb_bounce(phys_addr_t phys, char *dma_addr, size_t size, 49d7ef1533SKonrad Rzeszutek Wilk enum dma_data_direction dir); 50d7ef1533SKonrad Rzeszutek Wilk 511648993fSJoerg Roedel extern void 521648993fSJoerg Roedel *swiotlb_alloc_coherent(struct device *hwdev, size_t size, 531648993fSJoerg Roedel dma_addr_t *dma_handle, gfp_t flags); 541648993fSJoerg Roedel 551648993fSJoerg Roedel extern void 561648993fSJoerg Roedel swiotlb_free_coherent(struct device *hwdev, size_t size, 571648993fSJoerg Roedel void *vaddr, dma_addr_t dma_handle); 581648993fSJoerg Roedel 59f98eee8eSFUJITA Tomonori extern dma_addr_t swiotlb_map_page(struct device *dev, struct page *page, 60f98eee8eSFUJITA Tomonori unsigned long offset, size_t size, 61f98eee8eSFUJITA Tomonori enum dma_data_direction dir, 62f98eee8eSFUJITA Tomonori struct dma_attrs *attrs); 63f98eee8eSFUJITA Tomonori extern void swiotlb_unmap_page(struct device *hwdev, dma_addr_t dev_addr, 64f98eee8eSFUJITA Tomonori size_t size, enum dma_data_direction dir, 65f98eee8eSFUJITA Tomonori struct dma_attrs *attrs); 661648993fSJoerg Roedel 671648993fSJoerg Roedel extern int 681648993fSJoerg Roedel swiotlb_map_sg(struct device *hwdev, struct scatterlist *sg, int nents, 6922d48269SKonrad Rzeszutek Wilk enum dma_data_direction dir); 701648993fSJoerg Roedel 711648993fSJoerg Roedel extern void 721648993fSJoerg Roedel swiotlb_unmap_sg(struct device *hwdev, struct scatterlist *sg, int nents, 7322d48269SKonrad Rzeszutek Wilk enum dma_data_direction dir); 741648993fSJoerg Roedel 751648993fSJoerg Roedel extern int 761648993fSJoerg Roedel swiotlb_map_sg_attrs(struct device *hwdev, struct scatterlist *sgl, int nelems, 77160c1d8eSFUJITA Tomonori enum dma_data_direction dir, struct dma_attrs *attrs); 781648993fSJoerg Roedel 791648993fSJoerg Roedel extern void 801648993fSJoerg Roedel swiotlb_unmap_sg_attrs(struct device *hwdev, struct scatterlist *sgl, 81160c1d8eSFUJITA Tomonori int nelems, enum dma_data_direction dir, 82160c1d8eSFUJITA Tomonori struct dma_attrs *attrs); 831648993fSJoerg Roedel 841648993fSJoerg Roedel extern void 851648993fSJoerg Roedel swiotlb_sync_single_for_cpu(struct device *hwdev, dma_addr_t dev_addr, 86160c1d8eSFUJITA Tomonori size_t size, enum dma_data_direction dir); 871648993fSJoerg Roedel 881648993fSJoerg Roedel extern void 891648993fSJoerg Roedel swiotlb_sync_sg_for_cpu(struct device *hwdev, struct scatterlist *sg, 90160c1d8eSFUJITA Tomonori int nelems, enum dma_data_direction dir); 911648993fSJoerg Roedel 921648993fSJoerg Roedel extern void 931648993fSJoerg Roedel swiotlb_sync_single_for_device(struct device *hwdev, dma_addr_t dev_addr, 94160c1d8eSFUJITA Tomonori size_t size, enum dma_data_direction dir); 951648993fSJoerg Roedel 961648993fSJoerg Roedel extern void 971648993fSJoerg Roedel swiotlb_sync_sg_for_device(struct device *hwdev, struct scatterlist *sg, 98160c1d8eSFUJITA Tomonori int nelems, enum dma_data_direction dir); 991648993fSJoerg Roedel 1001648993fSJoerg Roedel extern int 1011648993fSJoerg Roedel swiotlb_dma_mapping_error(struct device *hwdev, dma_addr_t dma_addr); 1021648993fSJoerg Roedel 1031648993fSJoerg Roedel extern int 1041648993fSJoerg Roedel swiotlb_dma_supported(struct device *hwdev, u64 mask); 1051648993fSJoerg Roedel 1065740afdbSFUJITA Tomonori #ifdef CONFIG_SWIOTLB 1075740afdbSFUJITA Tomonori extern void __init swiotlb_free(void); 1085740afdbSFUJITA Tomonori #else 1095740afdbSFUJITA Tomonori static inline void swiotlb_free(void) { } 1105740afdbSFUJITA Tomonori #endif 1115740afdbSFUJITA Tomonori 112ad32e8cbSFUJITA Tomonori extern void swiotlb_print_info(void); 1131648993fSJoerg Roedel #endif /* __LINUX_SWIOTLB_H */ 114