diff options
Diffstat (limited to 'sys/arch/amd64/include/bus.h')
| -rw-r--r-- | sys/arch/amd64/include/bus.h | 47 |
1 files changed, 46 insertions, 1 deletions
diff --git a/sys/arch/amd64/include/bus.h b/sys/arch/amd64/include/bus.h index 1bb7ad405ea..8952c1a0678 100644 --- a/sys/arch/amd64/include/bus.h +++ b/sys/arch/amd64/include/bus.h @@ -1,4 +1,4 @@ -/* $OpenBSD: bus.h,v 1.16 2009/04/20 00:42:05 oga Exp $ */ +/* $OpenBSD: bus.h,v 1.17 2009/04/21 17:05:29 oga Exp $ */ /* $NetBSD: bus.h,v 1.6 1996/11/10 03:19:25 thorpej Exp $ */ /*- @@ -66,6 +66,8 @@ #ifndef _X86_BUS_H_ #define _X86_BUS_H_ +#include <sys/mutex.h> + #include <machine/pio.h> /* @@ -447,6 +449,7 @@ void bus_space_barrier(bus_space_tag_t, bus_space_handle_t, #define BUS_DMA_WRITE 0x0400 /* mapping is memory -> device only */ #define BUS_DMA_NOCACHE 0x0800 /* map memory uncached */ #define BUS_DMA_ZERO 0x1000 /* zero memory in dmamem_alloc */ +#define BUS_DMA_SG 0x2000 /* Internal. memory is for SG map */ /* Forwards needed by prototypes below. */ struct mbuf; @@ -473,6 +476,13 @@ typedef struct bus_dmamap *bus_dmamap_t; struct bus_dma_segment { bus_addr_t ds_addr; /* DMA address */ bus_size_t ds_len; /* length of transfer */ + /* + * Ugh. need this so can pass alignment down from bus_dmamem_alloc + * to scatter gather maps. only the first one is used so the rest is + * wasted space. bus_dma could do with fixing the api for this. + */ + bus_size_t _ds_boundary; /* don't cross */ + bus_size_t _ds_align; /* align to me */ }; typedef struct bus_dma_segment bus_dma_segment_t; @@ -604,6 +614,41 @@ int _bus_dmamem_alloc_range(bus_dma_tag_t tag, bus_size_t size, bus_dma_segment_t *segs, int nsegs, int *rsegs, int flags, paddr_t low, paddr_t high); +struct extent; + +/* Scatter gather bus_dma functions. */ +struct sg_cookie { + struct mutex sg_mtx; + struct extent *sg_ex; + void *sg_hdl; + void (*bind_page)(void *, vaddr_t, paddr_t, int); + void (*unbind_page)(void *, vaddr_t); + void (*flush_tlb)(void *); +}; + +struct sg_cookie *sg_dmatag_init(char *, void *, bus_addr_t, bus_size_t, + void (*)(void *, vaddr_t, paddr_t, int), + void (*)(void *, vaddr_t), void (*)(void *)); +void sg_dmatag_destroy(struct sg_cookie *); +int sg_dmamap_create(bus_dma_tag_t, bus_size_t, int, bus_size_t, + bus_size_t, int, bus_dmamap_t *); +void sg_dmamap_destroy(bus_dma_tag_t, bus_dmamap_t); +void sg_dmamap_set_alignment(bus_dma_tag_t, bus_dmamap_t, u_long); +int sg_dmamap_load(bus_dma_tag_t, bus_dmamap_t, void *, bus_size_t, + struct proc *, int); +int sg_dmamap_load_mbuf(bus_dma_tag_t, bus_dmamap_t, + struct mbuf *, int); +int sg_dmamap_load_uio(bus_dma_tag_t, bus_dmamap_t, struct uio *, int); +int sg_dmamap_load_raw(bus_dma_tag_t, bus_dmamap_t, bus_dma_segment_t *, + int, bus_size_t, int); +void sg_dmamap_unload(bus_dma_tag_t, bus_dmamap_t); +int sg_dmamap_load_buffer(bus_dma_tag_t, bus_dmamap_t, void *, bus_size_t, + struct proc *, int, int *, int); +int sg_dmamap_load_physarray(bus_dma_tag_t, bus_dmamap_t, paddr_t *, + int, int, int *, int); +int sg_dmamem_alloc(bus_dma_tag_t, bus_size_t, bus_size_t, bus_size_t, + bus_dma_segment_t *, int, int *, int); + /* * paddr_t bus_space_mmap(bus_space_tag_t t, bus_addr_t base, * off_t offset, int prot, int flags); |