diff options
Diffstat (limited to 'include/linux/swiotlb.h')
| -rw-r--r-- | include/linux/swiotlb.h | 158 |
1 files changed, 119 insertions, 39 deletions
diff --git a/include/linux/swiotlb.h b/include/linux/swiotlb.h index 046bb94bd4d6..35bc4e281c21 100644 --- a/include/linux/swiotlb.h +++ b/include/linux/swiotlb.h @@ -2,19 +2,20 @@ #ifndef __LINUX_SWIOTLB_H #define __LINUX_SWIOTLB_H +#include <linux/device.h> #include <linux/dma-direction.h> #include <linux/init.h> #include <linux/types.h> +#include <linux/limits.h> +#include <linux/spinlock.h> struct device; struct page; struct scatterlist; -enum swiotlb_force { - SWIOTLB_NORMAL, /* Default - depending on HW DMA mask etc. */ - SWIOTLB_FORCE, /* swiotlb=force */ - SWIOTLB_NO_FORCE, /* swiotlb=noforce */ -}; +#define SWIOTLB_VERBOSE (1 << 0) /* verbose initialization */ +#define SWIOTLB_FORCE (1 << 1) /* force bounce buffering */ +#define SWIOTLB_ANY (1 << 2) /* allow any memory for the buffer */ /* * Maximum allowable number of contiguous slabs to map, @@ -28,61 +29,111 @@ enum swiotlb_force { * controllable. */ #define IO_TLB_SHIFT 11 +#define IO_TLB_SIZE (1 << IO_TLB_SHIFT) + +/* default to 64MB */ +#define IO_TLB_DEFAULT_SIZE (64UL<<20) -extern void swiotlb_init(int verbose); -int swiotlb_init_with_tbl(char *tlb, unsigned long nslabs, int verbose); -extern unsigned long swiotlb_nr_tbl(void); unsigned long swiotlb_size_or_default(void); -extern int swiotlb_late_init_with_tbl(char *tlb, unsigned long nslabs); +void __init swiotlb_init_remap(bool addressing_limit, unsigned int flags, + int (*remap)(void *tlb, unsigned long nslabs)); +int swiotlb_init_late(size_t size, gfp_t gfp_mask, + int (*remap)(void *tlb, unsigned long nslabs)); extern void __init swiotlb_update_mem_attributes(void); -/* - * Enumeration for sync targets - */ -enum dma_sync_target { - SYNC_FOR_CPU = 0, - SYNC_FOR_DEVICE = 1, -}; - -extern phys_addr_t swiotlb_tbl_map_single(struct device *hwdev, - dma_addr_t tbl_dma_addr, - phys_addr_t phys, - size_t mapping_size, - size_t alloc_size, - enum dma_data_direction dir, - unsigned long attrs); +phys_addr_t swiotlb_tbl_map_single(struct device *hwdev, phys_addr_t phys, + size_t mapping_size, size_t alloc_size, + unsigned int alloc_aligned_mask, enum dma_data_direction dir, + unsigned long attrs); extern void swiotlb_tbl_unmap_single(struct device *hwdev, phys_addr_t tlb_addr, size_t mapping_size, - size_t alloc_size, enum dma_data_direction dir, unsigned long attrs); -extern void swiotlb_tbl_sync_single(struct device *hwdev, - phys_addr_t tlb_addr, - size_t size, enum dma_data_direction dir, - enum dma_sync_target target); - +void swiotlb_sync_single_for_device(struct device *dev, phys_addr_t tlb_addr, + size_t size, enum dma_data_direction dir); +void swiotlb_sync_single_for_cpu(struct device *dev, phys_addr_t tlb_addr, + size_t size, enum dma_data_direction dir); dma_addr_t swiotlb_map(struct device *dev, phys_addr_t phys, size_t size, enum dma_data_direction dir, unsigned long attrs); #ifdef CONFIG_SWIOTLB -extern enum swiotlb_force swiotlb_force; -extern phys_addr_t io_tlb_start, io_tlb_end; -static inline bool is_swiotlb_buffer(phys_addr_t paddr) +/** + * struct io_tlb_mem - IO TLB Memory Pool Descriptor + * + * @start: The start address of the swiotlb memory pool. Used to do a quick + * range check to see if the memory was in fact allocated by this + * API. + * @end: The end address of the swiotlb memory pool. Used to do a quick + * range check to see if the memory was in fact allocated by this + * API. + * @vaddr: The vaddr of the swiotlb memory pool. The swiotlb memory pool + * may be remapped in the memory encrypted case and store virtual + * address for bounce buffer operation. + * @nslabs: The number of IO TLB blocks (in groups of 64) between @start and + * @end. For default swiotlb, this is command line adjustable via + * setup_io_tlb_npages. + * @used: The number of used IO TLB block. + * @list: The free list describing the number of free entries available + * from each index. + * @orig_addr: The original address corresponding to a mapped entry. + * @alloc_size: Size of the allocated buffer. + * @debugfs: The dentry to debugfs. + * @late_alloc: %true if allocated using the page allocator + * @force_bounce: %true if swiotlb bouncing is forced + * @for_alloc: %true if the pool is used for memory allocation + * @nareas: The area number in the pool. + * @area_nslabs: The slot number in the area. + */ +struct io_tlb_mem { + phys_addr_t start; + phys_addr_t end; + void *vaddr; + unsigned long nslabs; + unsigned long used; + struct dentry *debugfs; + bool late_alloc; + bool force_bounce; + bool for_alloc; + unsigned int nareas; + unsigned int area_nslabs; + struct io_tlb_area *areas; + struct io_tlb_slot *slots; +}; +extern struct io_tlb_mem io_tlb_default_mem; + +static inline bool is_swiotlb_buffer(struct device *dev, phys_addr_t paddr) { - return paddr >= io_tlb_start && paddr < io_tlb_end; + struct io_tlb_mem *mem = dev->dma_io_tlb_mem; + + return mem && paddr >= mem->start && paddr < mem->end; +} + +static inline bool is_swiotlb_force_bounce(struct device *dev) +{ + struct io_tlb_mem *mem = dev->dma_io_tlb_mem; + + return mem && mem->force_bounce; } +void swiotlb_init(bool addressing_limited, unsigned int flags); void __init swiotlb_exit(void); unsigned int swiotlb_max_segment(void); size_t swiotlb_max_mapping_size(struct device *dev); -bool is_swiotlb_active(void); +bool is_swiotlb_active(struct device *dev); +void __init swiotlb_adjust_size(unsigned long size); #else -#define swiotlb_force SWIOTLB_NO_FORCE -static inline bool is_swiotlb_buffer(phys_addr_t paddr) +static inline void swiotlb_init(bool addressing_limited, unsigned int flags) +{ +} +static inline bool is_swiotlb_buffer(struct device *dev, phys_addr_t paddr) +{ + return false; +} +static inline bool is_swiotlb_force_bounce(struct device *dev) { return false; } @@ -98,13 +149,42 @@ static inline size_t swiotlb_max_mapping_size(struct device *dev) return SIZE_MAX; } -static inline bool is_swiotlb_active(void) +static inline bool is_swiotlb_active(struct device *dev) { return false; } + +static inline void swiotlb_adjust_size(unsigned long size) +{ +} #endif /* CONFIG_SWIOTLB */ extern void swiotlb_print_info(void); -extern void swiotlb_set_max_segment(unsigned int); + +#ifdef CONFIG_DMA_RESTRICTED_POOL +struct page *swiotlb_alloc(struct device *dev, size_t size); +bool swiotlb_free(struct device *dev, struct page *page, size_t size); + +static inline bool is_swiotlb_for_alloc(struct device *dev) +{ + return dev->dma_io_tlb_mem->for_alloc; +} +#else +static inline struct page *swiotlb_alloc(struct device *dev, size_t size) +{ + return NULL; +} +static inline bool swiotlb_free(struct device *dev, struct page *page, + size_t size) +{ + return false; +} +static inline bool is_swiotlb_for_alloc(struct device *dev) +{ + return false; +} +#endif /* CONFIG_DMA_RESTRICTED_POOL */ + +extern phys_addr_t swiotlb_unencrypted_base; #endif /* __LINUX_SWIOTLB_H */ |