11648993fSJoerg Roedel #ifndef __LINUX_SWIOTLB_H 21648993fSJoerg Roedel #define __LINUX_SWIOTLB_H 31648993fSJoerg Roedel 438674442SThierry Reding #include <linux/dma-direction.h> 538674442SThierry Reding #include <linux/init.h> 61648993fSJoerg Roedel #include <linux/types.h> 71648993fSJoerg Roedel 81648993fSJoerg Roedel struct device; 938674442SThierry Reding struct page; 101648993fSJoerg Roedel struct scatterlist; 111648993fSJoerg Roedel 126959450eSFUJITA Tomonori extern int swiotlb_force; 136959450eSFUJITA Tomonori 140016fdeeSIan Campbell /* 150016fdeeSIan Campbell * Maximum allowable number of contiguous slabs to map, 160016fdeeSIan Campbell * must be a power of 2. What is the appropriate value ? 170016fdeeSIan Campbell * The complexity of {map,unmap}_single is linearly dependent on this value. 180016fdeeSIan Campbell */ 190016fdeeSIan Campbell #define IO_TLB_SEGSIZE 128 200016fdeeSIan Campbell 210016fdeeSIan Campbell /* 220016fdeeSIan Campbell * log of the size of each IO TLB slab. The number of slabs is command line 230016fdeeSIan Campbell * controllable. 240016fdeeSIan Campbell */ 250016fdeeSIan Campbell #define IO_TLB_SHIFT 11 260016fdeeSIan Campbell 27ad32e8cbSFUJITA Tomonori extern void swiotlb_init(int verbose); 28ac2cbab2SYinghai Lu int swiotlb_init_with_tbl(char *tlb, unsigned long nslabs, int verbose); 29f21ffe9fSKonrad Rzeszutek Wilk extern unsigned long swiotlb_nr_tbl(void); 30c729de8fSYinghai Lu unsigned long swiotlb_size_or_default(void); 3174838b75SKonrad Rzeszutek Wilk extern int swiotlb_late_init_with_tbl(char *tlb, unsigned long nslabs); 321648993fSJoerg Roedel 33d7ef1533SKonrad Rzeszutek Wilk /* 34d7ef1533SKonrad Rzeszutek Wilk * Enumeration for sync targets 35d7ef1533SKonrad Rzeszutek Wilk */ 36d7ef1533SKonrad Rzeszutek Wilk enum dma_sync_target { 37d7ef1533SKonrad Rzeszutek Wilk SYNC_FOR_CPU = 0, 38d7ef1533SKonrad Rzeszutek Wilk SYNC_FOR_DEVICE = 1, 39d7ef1533SKonrad Rzeszutek Wilk }; 40e05ed4d1SAlexander Duyck 41e05ed4d1SAlexander Duyck /* define the last possible byte of physical address space as a mapping error */ 42e05ed4d1SAlexander Duyck #define SWIOTLB_MAP_ERROR (~(phys_addr_t)0x0) 43e05ed4d1SAlexander Duyck 44e05ed4d1SAlexander Duyck extern phys_addr_t swiotlb_tbl_map_single(struct device *hwdev, 45e05ed4d1SAlexander Duyck dma_addr_t tbl_dma_addr, 46d7ef1533SKonrad Rzeszutek Wilk phys_addr_t phys, size_t size, 47*0443fa00SAlexander Duyck enum dma_data_direction dir, 48*0443fa00SAlexander Duyck unsigned long attrs); 49d7ef1533SKonrad Rzeszutek Wilk 5061ca08c3SAlexander Duyck extern void swiotlb_tbl_unmap_single(struct device *hwdev, 5161ca08c3SAlexander Duyck phys_addr_t tlb_addr, 52*0443fa00SAlexander Duyck size_t size, enum dma_data_direction dir, 53*0443fa00SAlexander Duyck unsigned long attrs); 54d7ef1533SKonrad Rzeszutek Wilk 55fbfda893SAlexander Duyck extern void swiotlb_tbl_sync_single(struct device *hwdev, 56fbfda893SAlexander Duyck phys_addr_t tlb_addr, 57d7ef1533SKonrad Rzeszutek Wilk size_t size, enum dma_data_direction dir, 58d7ef1533SKonrad Rzeszutek Wilk enum dma_sync_target target); 59d7ef1533SKonrad Rzeszutek Wilk 60d7ef1533SKonrad Rzeszutek Wilk /* Accessory functions. */ 611648993fSJoerg Roedel extern void 621648993fSJoerg Roedel *swiotlb_alloc_coherent(struct device *hwdev, size_t size, 631648993fSJoerg Roedel dma_addr_t *dma_handle, gfp_t flags); 641648993fSJoerg Roedel 651648993fSJoerg Roedel extern void 661648993fSJoerg Roedel swiotlb_free_coherent(struct device *hwdev, size_t size, 671648993fSJoerg Roedel void *vaddr, dma_addr_t dma_handle); 681648993fSJoerg Roedel 69f98eee8eSFUJITA Tomonori extern dma_addr_t swiotlb_map_page(struct device *dev, struct page *page, 70f98eee8eSFUJITA Tomonori unsigned long offset, size_t size, 71f98eee8eSFUJITA Tomonori enum dma_data_direction dir, 7200085f1eSKrzysztof Kozlowski unsigned long attrs); 73f98eee8eSFUJITA Tomonori extern void swiotlb_unmap_page(struct device *hwdev, dma_addr_t dev_addr, 74f98eee8eSFUJITA Tomonori size_t size, enum dma_data_direction dir, 7500085f1eSKrzysztof Kozlowski unsigned long attrs); 761648993fSJoerg Roedel 771648993fSJoerg Roedel extern int 781648993fSJoerg Roedel swiotlb_map_sg_attrs(struct device *hwdev, struct scatterlist *sgl, int nelems, 7900085f1eSKrzysztof Kozlowski enum dma_data_direction dir, 8000085f1eSKrzysztof Kozlowski unsigned long attrs); 811648993fSJoerg Roedel 821648993fSJoerg Roedel extern void 831648993fSJoerg Roedel swiotlb_unmap_sg_attrs(struct device *hwdev, struct scatterlist *sgl, 84160c1d8eSFUJITA Tomonori int nelems, enum dma_data_direction dir, 8500085f1eSKrzysztof Kozlowski unsigned long attrs); 861648993fSJoerg Roedel 871648993fSJoerg Roedel extern void 881648993fSJoerg Roedel swiotlb_sync_single_for_cpu(struct device *hwdev, dma_addr_t dev_addr, 89160c1d8eSFUJITA Tomonori size_t size, enum dma_data_direction dir); 901648993fSJoerg Roedel 911648993fSJoerg Roedel extern void 921648993fSJoerg Roedel swiotlb_sync_sg_for_cpu(struct device *hwdev, struct scatterlist *sg, 93160c1d8eSFUJITA Tomonori int nelems, enum dma_data_direction dir); 941648993fSJoerg Roedel 951648993fSJoerg Roedel extern void 961648993fSJoerg Roedel swiotlb_sync_single_for_device(struct device *hwdev, dma_addr_t dev_addr, 97160c1d8eSFUJITA Tomonori size_t size, enum dma_data_direction dir); 981648993fSJoerg Roedel 991648993fSJoerg Roedel extern void 1001648993fSJoerg Roedel swiotlb_sync_sg_for_device(struct device *hwdev, struct scatterlist *sg, 101160c1d8eSFUJITA Tomonori int nelems, enum dma_data_direction dir); 1021648993fSJoerg Roedel 1031648993fSJoerg Roedel extern int 1041648993fSJoerg Roedel swiotlb_dma_mapping_error(struct device *hwdev, dma_addr_t dma_addr); 1051648993fSJoerg Roedel 1061648993fSJoerg Roedel extern int 1071648993fSJoerg Roedel swiotlb_dma_supported(struct device *hwdev, u64 mask); 1081648993fSJoerg Roedel 1095740afdbSFUJITA Tomonori #ifdef CONFIG_SWIOTLB 1105740afdbSFUJITA Tomonori extern void __init swiotlb_free(void); 1115740afdbSFUJITA Tomonori #else 1125740afdbSFUJITA Tomonori static inline void swiotlb_free(void) { } 1135740afdbSFUJITA Tomonori #endif 1145740afdbSFUJITA Tomonori 115ad32e8cbSFUJITA Tomonori extern void swiotlb_print_info(void); 1169c5a3621SAkinobu Mita extern int is_swiotlb_buffer(phys_addr_t paddr); 1179c5a3621SAkinobu Mita 1181648993fSJoerg Roedel #endif /* __LINUX_SWIOTLB_H */ 119