diff options
Diffstat (limited to 'sys/powerpc/include/bus.h')
| -rw-r--r-- | sys/powerpc/include/bus.h | 387 |
1 files changed, 176 insertions, 211 deletions
diff --git a/sys/powerpc/include/bus.h b/sys/powerpc/include/bus.h index 2428f4bffe77..8eaa8134a9f4 100644 --- a/sys/powerpc/include/bus.h +++ b/sys/powerpc/include/bus.h @@ -74,18 +74,28 @@ #include <machine/pio.h> +#define BUS_SPACE_MAXSIZE_24BIT 0xFFFFFF +#define BUS_SPACE_MAXSIZE_32BIT 0xFFFFFFFF +#define BUS_SPACE_MAXSIZE (128 * 1024) /* Maximum supported size */ +#define BUS_SPACE_MAXADDR_24BIT 0xFFFFFF +#define BUS_SPACE_MAXADDR_32BIT 0xFFFFFFFF +#define BUS_SPACE_MAXADDR 0xFFFFFFFF + +#define BUS_SPACE_UNRESTRICTED (~0) + /* * Values for the macppc bus space tag, not to be used directly by MI code. */ #define __BUS_SPACE_HAS_STREAM_METHODS -#define MACPPC_BUS_ADDR_MASK 0xfffff000 -#define MACPPC_BUS_STRIDE_MASK 0x0000000f +/* + * Values for the ppc bus space tag, not to be used directly by MI code. + */ +#define PPC_BUS_SPACE_MEM 1 /* space is mem space */ -#define macppc_make_bus_space_tag(addr, stride) \ - (((addr) & MACPPC_BUS_ADDR_MASK) | (stride)) -#define __BA(t, h, o) ((void *)((h) + ((o) << ((t) & MACPPC_BUS_STRIDE_MASK)))) + +#define __BA(t, h, o) ((void *)((h) + (o))) /* * Bus address and size types @@ -99,30 +109,22 @@ typedef u_int32_t bus_size_t; typedef u_int32_t bus_space_tag_t; typedef u_int32_t bus_space_handle_t; +static __inline void * +__ppc_ba(bus_space_tag_t tag, bus_space_handle_t handle, bus_size_t offset) +{ + return ((void *)(handle + offset)); +} + + /* * int bus_space_map(bus_space_tag_t t, bus_addr_t addr, * bus_size_t size, int flags, bus_space_handle_t *bshp)); * * Map a region of bus space. */ - -#define BUS_SPACE_MAP_CACHEABLE 0x01 -#define BUS_SPACE_MAP_LINEAR 0x02 -#define BUS_SPACE_MAP_PREFETCHABLE 0x04 - -extern void *mapiodev(vm_offset_t, vm_size_t); - -static __inline int -bus_space_map(bus_space_tag_t t, bus_addr_t addr, bus_size_t size, int flags, - bus_space_handle_t *bshp) -{ - vm_offset_t base = t & MACPPC_BUS_ADDR_MASK; - int stride = t & MACPPC_BUS_STRIDE_MASK; - - *bshp = (bus_space_handle_t) - mapiodev(base + (addr << stride), size << stride); - return 0; -} +#if 0 +bus_space_map(t, addr, size, flags, bshp) ! not implemented ! +#endif /* * int bus_space_unmap(bus_space_tag_t t, @@ -142,7 +144,7 @@ bus_space_map(bus_space_tag_t t, bus_addr_t addr, bus_size_t size, int flags, */ #define bus_space_subregion(t, bsh, offset, size, bshp) \ - ((*(bshp) = (bus_space_handle_t)__BA(t, bsh, offset)), 0) + ((*(bshp) = (bus_space_handle_t)__ppc_ba(t, bsh, offset)), 0) /* * int bus_space_alloc(bus_space_tag_t t, bus_addr_t rstart, @@ -175,16 +177,16 @@ bus_space_map(bus_space_tag_t t, bus_addr_t addr, bus_size_t size, int flags, * described by tag/handle/offset. */ -#define bus_space_read_1(t, h, o) (in8(__BA(t, h, o))) -#define bus_space_read_2(t, h, o) (in16rb(__BA(t, h, o))) -#define bus_space_read_4(t, h, o) (in32rb(__BA(t, h, o))) +#define bus_space_read_1(t, h, o) (in8(__ppc_ba(t, h, o))) +#define bus_space_read_2(t, h, o) (in16rb(__ppc_ba(t, h, o))) +#define bus_space_read_4(t, h, o) (in32rb(__ppc_ba(t, h, o))) #if 0 /* Cause a link error for bus_space_read_8 */ #define bus_space_read_8(t, h, o) !!! unimplemented !!! #endif -#define bus_space_read_stream_1(t, h, o) (in8(__BA(t, h, o))) -#define bus_space_read_stream_2(t, h, o) (in16(__BA(t, h, o))) -#define bus_space_read_stream_4(t, h, o) (in32(__BA(t, h, o))) +#define bus_space_read_stream_1(t, h, o) (in8(__ppc_ba(t, h, o))) +#define bus_space_read_stream_2(t, h, o) (in16(__ppc_ba(t, h, o))) +#define bus_space_read_stream_4(t, h, o) (in32(__ppc_ba(t, h, o))) #if 0 /* Cause a link error for bus_space_read_stream_8 */ #define bus_space_read_8(t, h, o) !!! unimplemented !!! #endif @@ -199,15 +201,15 @@ bus_space_map(bus_space_tag_t t, bus_addr_t addr, bus_size_t size, int flags, */ #define bus_space_read_multi_1(t, h, o, a, c) do { \ - ins8(__BA(t, h, o), (a), (c)); \ + ins8(__ppc_ba(t, h, o), (a), (c)); \ } while (0) #define bus_space_read_multi_2(t, h, o, a, c) do { \ - ins16rb(__BA(t, h, o), (a), (c)); \ + ins16rb(__ppc_ba(t, h, o), (a), (c)); \ } while (0) #define bus_space_read_multi_4(t, h, o, a, c) do { \ - ins32rb(__BA(t, h, o), (a), (c)); \ + ins32rb(__ppc_ba(t, h, o), (a), (c)); \ } while (0) #if 0 /* Cause a link error for bus_space_read_multi_8 */ @@ -215,15 +217,15 @@ bus_space_map(bus_space_tag_t t, bus_addr_t addr, bus_size_t size, int flags, #endif #define bus_space_read_multi_stream_1(t, h, o, a, c) do { \ - ins8(__BA(t, h, o), (a), (c)); \ + ins8(__ppc_ba(t, h, o), (a), (c)); \ } while (0) #define bus_space_read_multi_stream_2(t, h, o, a, c) do { \ - ins16(__BA(t, h, o), (a), (c)); \ + ins16(__ppc_ba(t, h, o), (a), (c)); \ } while (0) #define bus_space_read_multi_stream_4(t, h, o, a, c) do { \ - ins32(__BA(t, h, o), (a), (c)); \ + ins32(__ppc_ba(t, h, o), (a), (c)); \ } while (0) #if 0 /* Cause a link error for bus_space_read_multi_stream_8 */ @@ -244,7 +246,7 @@ static __inline void bus_space_read_region_1(bus_space_tag_t tag, bus_space_handle_t bsh, bus_size_t offset, u_int8_t *addr, size_t count) { - volatile u_int8_t *s = __BA(tag, bsh, offset); + volatile u_int8_t *s = __ppc_ba(tag, bsh, offset); while (count--) *addr++ = *s++; @@ -255,7 +257,7 @@ static __inline void bus_space_read_region_2(bus_space_tag_t tag, bus_space_handle_t bsh, bus_size_t offset, u_int16_t *addr, size_t count) { - volatile u_int16_t *s = __BA(tag, bsh, offset); + volatile u_int16_t *s = __ppc_ba(tag, bsh, offset); while (count--) __asm __volatile("lhbrx %0, 0, %1" : @@ -267,7 +269,7 @@ static __inline void bus_space_read_region_4(bus_space_tag_t tag, bus_space_handle_t bsh, bus_size_t offset, u_int32_t *addr, size_t count) { - volatile u_int32_t *s = __BA(tag, bsh, offset); + volatile u_int32_t *s = __ppc_ba(tag, bsh, offset); while (count--) __asm __volatile("lwbrx %0, 0, %1" : @@ -283,7 +285,7 @@ static __inline void bus_space_read_region_stream_2(bus_space_tag_t tag, bus_space_handle_t bsh, bus_size_t offset, u_int16_t *addr, size_t count) { - volatile u_int16_t *s = __BA(tag, bsh, offset); + volatile u_int16_t *s = __ppc_ba(tag, bsh, offset); while (count--) *addr++ = *s++; @@ -294,7 +296,7 @@ static __inline void bus_space_read_region_stream_4(bus_space_tag_t tag, bus_space_handle_t bsh, bus_size_t offset, u_int32_t *addr, size_t count) { - volatile u_int32_t *s = __BA(tag, bsh, offset); + volatile u_int32_t *s = __ppc_ba(tag, bsh, offset); while (count--) *addr++ = *s++; @@ -314,13 +316,13 @@ bus_space_read_region_stream_4(bus_space_tag_t tag, bus_space_handle_t bsh, * described by tag/handle/offset. */ -#define bus_space_write_1(t, h, o, v) out8(__BA(t, h, o), (v)) -#define bus_space_write_2(t, h, o, v) out16rb(__BA(t, h, o), (v)) -#define bus_space_write_4(t, h, o, v) out32rb(__BA(t, h, o), (v)) +#define bus_space_write_1(t, h, o, v) out8(__ppc_ba(t, h, o), (v)) +#define bus_space_write_2(t, h, o, v) out16rb(__ppc_ba(t, h, o), (v)) +#define bus_space_write_4(t, h, o, v) out32rb(__ppc_ba(t, h, o), (v)) -#define bus_space_write_stream_1(t, h, o, v) out8(__BA(t, h, o), (v)) -#define bus_space_write_stream_2(t, h, o, v) out16(__BA(t, h, o), (v)) -#define bus_space_write_stream_4(t, h, o, v) out32(__BA(t, h, o), (v)) +#define bus_space_write_stream_1(t, h, o, v) out8(__ppc_ba(t, h, o), (v)) +#define bus_space_write_stream_2(t, h, o, v) out16(__ppc_ba(t, h, o), (v)) +#define bus_space_write_stream_4(t, h, o, v) out32(__ppc_ba(t, h, o), (v)) #if 0 /* Cause a link error for bus_space_write_8 */ #define bus_space_write_8 !!! unimplemented !!! @@ -336,15 +338,15 @@ bus_space_read_region_stream_4(bus_space_tag_t tag, bus_space_handle_t bsh, */ #define bus_space_write_multi_1(t, h, o, a, c) do { \ - outsb(__BA(t, h, o), (a), (c)); \ + outsb(__ppc_ba(t, h, o), (a), (c)); \ } while (0) #define bus_space_write_multi_2(t, h, o, a, c) do { \ - outsw(__BA(t, h, o), (a), (c)); \ + outsw(__ppc_ba(t, h, o), (a), (c)); \ } while (0) #define bus_space_write_multi_4(t, h, o, a, c) do { \ - outsl(__BA(t, h, o), (a), (c)); \ + outsl(__ppc_ba(t, h, o), (a), (c)); \ } while (0) #if 0 @@ -352,11 +354,11 @@ bus_space_read_region_stream_4(bus_space_tag_t tag, bus_space_handle_t bsh, #endif #define bus_space_write_multi_stream_2(t, h, o, a, c) do { \ - outsw(__BA(t, h, o), (a), (c)); \ + outsw(__ppc_ba(t, h, o), (a), (c)); \ } while (0) #define bus_space_write_multi_stream_4(t, h, o, a, c) do { \ - outsl(__BA(t, h, o), (a), (c)); \ + outsl(__ppc_ba(t, h, o), (a), (c)); \ } while (0) #if 0 @@ -376,7 +378,7 @@ static __inline void bus_space_write_region_1(bus_space_tag_t tag, bus_space_handle_t bsh, bus_size_t offset, const u_int8_t *addr, size_t count) { - volatile u_int8_t *d = __BA(tag, bsh, offset); + volatile u_int8_t *d = __ppc_ba(tag, bsh, offset); while (count--) *d++ = *addr++; @@ -387,7 +389,7 @@ static __inline void bus_space_write_region_2(bus_space_tag_t tag, bus_space_handle_t bsh, bus_size_t offset, const u_int16_t *addr, size_t count) { - volatile u_int16_t *d = __BA(tag, bsh, offset); + volatile u_int16_t *d = __ppc_ba(tag, bsh, offset); while (count--) __asm __volatile("sthbrx %0, 0, %1" :: @@ -399,7 +401,7 @@ static __inline void bus_space_write_region_4(bus_space_tag_t tag, bus_space_handle_t bsh, bus_size_t offset, const u_int32_t *addr, size_t count) { - volatile u_int32_t *d = __BA(tag, bsh, offset); + volatile u_int32_t *d = __ppc_ba(tag, bsh, offset); while (count--) __asm __volatile("stwbrx %0, 0, %1" :: @@ -415,7 +417,7 @@ static __inline void bus_space_write_region_stream_2(bus_space_tag_t tag, bus_space_handle_t bsh, bus_size_t offset, const u_int16_t *addr, size_t count) { - volatile u_int16_t *d = __BA(tag, bsh, offset); + volatile u_int16_t *d = __ppc_ba(tag, bsh, offset); while (count--) *d++ = *addr++; @@ -426,7 +428,7 @@ static __inline void bus_space_write_region_stream_4(bus_space_tag_t tag, bus_space_handle_t bsh, bus_size_t offset, const u_int32_t *addr, size_t count) { - volatile u_int32_t *d = __BA(tag, bsh, offset); + volatile u_int32_t *d = __ppc_ba(tag, bsh, offset); while (count--) *d++ = *addr++; @@ -450,7 +452,7 @@ static __inline void bus_space_set_multi_1(bus_space_tag_t tag, bus_space_handle_t bsh, bus_size_t offset, u_int8_t val, size_t count) { - volatile u_int8_t *d = __BA(tag, bsh, offset); + volatile u_int8_t *d = __ppc_ba(tag, bsh, offset); while (count--) *d = val; @@ -461,7 +463,7 @@ static __inline void bus_space_set_multi_2(bus_space_tag_t tag, bus_space_handle_t bsh, bus_size_t offset, u_int16_t val, size_t count) { - volatile u_int16_t *d = __BA(tag, bsh, offset); + volatile u_int16_t *d = __ppc_ba(tag, bsh, offset); while (count--) __asm __volatile("sthbrx %0, 0, %1" :: @@ -473,7 +475,7 @@ static __inline void bus_space_set_multi_4(bus_space_tag_t tag, bus_space_handle_t bsh, bus_size_t offset, u_int32_t val, size_t count) { - volatile u_int32_t *d = __BA(tag, bsh, offset); + volatile u_int32_t *d = __ppc_ba(tag, bsh, offset); while (count--) __asm __volatile("stwbrx %0, 0, %1" :: @@ -489,7 +491,7 @@ static __inline void bus_space_set_multi_stream_2(bus_space_tag_t tag, bus_space_handle_t bsh, bus_size_t offset, u_int16_t val, size_t count) { - volatile u_int16_t *d = __BA(tag, bsh, offset); + volatile u_int16_t *d = __ppc_ba(tag, bsh, offset); while (count--) *d = val; @@ -500,7 +502,7 @@ static __inline void bus_space_set_multi_stream_4(bus_space_tag_t tag, bus_space_handle_t bsh, bus_size_t offset, u_int32_t val, size_t count) { - volatile u_int32_t *d = __BA(tag, bsh, offset); + volatile u_int32_t *d = __ppc_ba(tag, bsh, offset); while (count--) *d = val; @@ -524,7 +526,7 @@ static __inline void bus_space_set_region_1(bus_space_tag_t tag, bus_space_handle_t bsh, bus_size_t offset, u_int8_t val, size_t count) { - volatile u_int8_t *d = __BA(tag, bsh, offset); + volatile u_int8_t *d = __ppc_ba(tag, bsh, offset); while (count--) *d++ = val; @@ -535,7 +537,7 @@ static __inline void bus_space_set_region_2(bus_space_tag_t tag, bus_space_handle_t bsh, bus_size_t offset, u_int16_t val, size_t count) { - volatile u_int16_t *d = __BA(tag, bsh, offset); + volatile u_int16_t *d = __ppc_ba(tag, bsh, offset); while (count--) __asm __volatile("sthbrx %0, 0, %1" :: @@ -547,7 +549,7 @@ static __inline void bus_space_set_region_4(bus_space_tag_t tag, bus_space_handle_t bsh, bus_size_t offset, u_int32_t val, size_t count) { - volatile u_int32_t *d = __BA(tag, bsh, offset); + volatile u_int32_t *d = __ppc_ba(tag, bsh, offset); while (count--) __asm __volatile("stwbrx %0, 0, %1" :: @@ -563,7 +565,7 @@ static __inline void bus_space_set_region_stream_2(bus_space_tag_t tag, bus_space_handle_t bsh, bus_size_t offset, u_int16_t val, size_t count) { - volatile u_int16_t *d = __BA(tag, bsh, offset); + volatile u_int16_t *d = __ppc_ba(tag, bsh, offset); while (count--) *d++ = val; @@ -574,7 +576,7 @@ static __inline void bus_space_set_region_stream_4(bus_space_tag_t tag, bus_space_handle_t bsh, bus_size_t offset, u_int32_t val, size_t count) { - volatile u_int32_t *d = __BA(tag, bsh, offset); + volatile u_int32_t *d = __ppc_ba(tag, bsh, offset); while (count--) *d++ = val; @@ -636,15 +638,33 @@ struct mbuf; struct uio; /* - * Operations performed by bus_dmamap_sync(). + * bus_dmasync_op_t + * + * Operations performed by bus_dmamap_sync(). + */ +typedef enum { + BUS_DMASYNC_PREREAD, + BUS_DMASYNC_POSTREAD, + BUS_DMASYNC_PREWRITE, + BUS_DMASYNC_POSTWRITE +} bus_dmasync_op_t; + +/* + * bus_dma_tag_t + * + * A machine-dependent opaque type describing the characteristics + * of how to perform DMA mappings. This structure encapsultes + * information concerning address and alignment restrictions, number + * of S/G segments, amount of data per S/G segment, etc. */ -#define BUS_DMASYNC_PREREAD 0x01 /* pre-read synchronization */ -#define BUS_DMASYNC_POSTREAD 0x02 /* post-read synchronization */ -#define BUS_DMASYNC_PREWRITE 0x04 /* pre-write synchronization */ -#define BUS_DMASYNC_POSTWRITE 0x08 /* post-write synchronization */ +typedef struct bus_dma_tag *bus_dma_tag_t; -typedef struct macppc_bus_dma_tag *bus_dma_tag_t; -typedef struct macppc_bus_dmamap *bus_dmamap_t; +/* + * bus_dmamap_t + * + * DMA mapping instance information. + */ +typedef struct bus_dmamap *bus_dmamap_t; /* * bus_dma_segment_t @@ -652,147 +672,92 @@ typedef struct macppc_bus_dmamap *bus_dmamap_t; * Describes a single contiguous DMA transaction. Values * are suitable for programming into DMA registers. */ -struct macppc_bus_dma_segment { +typedef struct bus_dma_segment { bus_addr_t ds_addr; /* DMA address */ bus_size_t ds_len; /* length of transfer */ -}; -typedef struct macppc_bus_dma_segment bus_dma_segment_t; +} bus_dma_segment_t; /* - * bus_dma_tag_t - * - * A machine-dependent opaque type describing the implementation of - * DMA for a given bus. - */ - -struct macppc_bus_dma_tag { - /* - * The `bounce threshold' is checked while we are loading - * the DMA map. If the physical address of the segment - * exceeds the threshold, an error will be returned. The - * caller can then take whatever action is necessary to - * bounce the transfer. If this value is 0, it will be - * ignored. - */ - bus_addr_t _bounce_thresh; - - /* - * DMA mapping methods. - */ - int (*_dmamap_create)(bus_dma_tag_t, bus_size_t, int, - bus_size_t, bus_size_t, int, bus_dmamap_t *); - void (*_dmamap_destroy)(bus_dma_tag_t, bus_dmamap_t); - int (*_dmamap_load)(bus_dma_tag_t, bus_dmamap_t, void *, - bus_size_t, struct proc *, int); - int (*_dmamap_load_mbuf)(bus_dma_tag_t, bus_dmamap_t, - struct mbuf *, int); - int (*_dmamap_load_uio)(bus_dma_tag_t, bus_dmamap_t, - struct uio *, int); - int (*_dmamap_load_raw)(bus_dma_tag_t, bus_dmamap_t, - bus_dma_segment_t *, int, bus_size_t, int); - void (*_dmamap_unload)(bus_dma_tag_t, bus_dmamap_t); - void (*_dmamap_sync)(bus_dma_tag_t, bus_dmamap_t, - bus_addr_t, bus_size_t, int); - - /* - * DMA memory utility functions. - */ - int (*_dmamem_alloc)(bus_dma_tag_t, bus_size_t, bus_size_t, - bus_size_t, bus_dma_segment_t *, int, int *, int); - void (*_dmamem_free)(bus_dma_tag_t, bus_dma_segment_t *, int); - int (*_dmamem_map)(bus_dma_tag_t, bus_dma_segment_t *, - int, size_t, caddr_t *, int); - void (*_dmamem_unmap)(bus_dma_tag_t, caddr_t, size_t); - vm_offset_t (*_dmamem_mmap)(bus_dma_tag_t, bus_dma_segment_t *, - int, off_t, int, int); -}; - -#define bus_dmamap_create(t, s, n, m, b, f, p) \ - (*(t)->_dmamap_create)((t), (s), (n), (m), (b), (f), (p)) -#define bus_dmamap_destroy(t, p) \ - (*(t)->_dmamap_destroy)((t), (p)) -#define bus_dmamap_load(t, m, b, s, p, f) \ - (*(t)->_dmamap_load)((t), (m), (b), (s), (p), (f)) -#define bus_dmamap_load_mbuf(t, m, b, f) \ - (*(t)->_dmamap_load_mbuf)((t), (m), (b), (f)) -#define bus_dmamap_load_uio(t, m, u, f) \ - (*(t)->_dmamap_load_uio)((t), (m), (u), (f)) -#define bus_dmamap_load_raw(t, m, sg, n, s, f) \ - (*(t)->_dmamap_load_raw)((t), (m), (sg), (n), (s), (f)) -#define bus_dmamap_unload(t, p) \ - (*(t)->_dmamap_unload)((t), (p)) -#define bus_dmamap_sync(t, p, o, l, ops) \ - (void)((t)->_dmamap_sync ? \ - (*(t)->_dmamap_sync)((t), (p), (o), (l), (ops)) : (void)0) - -#define bus_dmamem_alloc(t, s, a, b, sg, n, r, f) \ - (*(t)->_dmamem_alloc)((t), (s), (a), (b), (sg), (n), (r), (f)) -#define bus_dmamem_free(t, sg, n) \ - (*(t)->_dmamem_free)((t), (sg), (n)) -#define bus_dmamem_map(t, sg, n, s, k, f) \ - (*(t)->_dmamem_map)((t), (sg), (n), (s), (k), (f)) -#define bus_dmamem_unmap(t, k, s) \ - (*(t)->_dmamem_unmap)((t), (k), (s)) -#define bus_dmamem_mmap(t, sg, n, o, p, f) \ - (*(t)->_dmamem_mmap)((t), (sg), (n), (o), (p), (f)) - -/* - * bus_dmamap_t + * A function that returns 1 if the address cannot be accessed by + * a device and 0 if it can be. + */ +typedef int bus_dma_filter_t(void *, bus_addr_t); + +/* + * Allocate a device specific dma_tag encapsulating the constraints of + * the parent tag in addition to other restrictions specified: * - * Describes a DMA mapping. - */ -struct macppc_bus_dmamap { - /* - * PRIVATE MEMBERS: not for use my machine-independent code. - */ - bus_size_t _dm_size; /* largest DMA transfer mappable */ - int _dm_segcnt; /* number of segs this map can map */ - bus_size_t _dm_maxsegsz; /* largest possible segment */ - bus_size_t _dm_boundary; /* don't cross this */ - bus_addr_t _dm_bounce_thresh; /* bounce threshold; see tag */ - int _dm_flags; /* misc. flags */ - - void *_dm_cookie; /* cookie for bus-specific functions */ - - /* - * PUBLIC MEMBERS: these are used by machine-independent code. - */ - bus_size_t dm_mapsize; /* size of the mapping */ - int dm_nsegs; /* # valid segments in mapping */ - bus_dma_segment_t dm_segs[1]; /* segments; variable length */ -}; - -#ifdef _MACPPC_BUS_DMA_PRIVATE -int _bus_dmamap_create(bus_dma_tag_t, bus_size_t, int, bus_size_t, - bus_size_t, int, bus_dmamap_t *); -void _bus_dmamap_destroy(bus_dma_tag_t, bus_dmamap_t); -int _bus_dmamap_load(bus_dma_tag_t, bus_dmamap_t, void *, - bus_size_t, struct proc *, int); -int _bus_dmamap_load_mbuf(bus_dma_tag_t, bus_dmamap_t, struct mbuf *, int); -int _bus_dmamap_load_uio(bus_dma_tag_t, bus_dmamap_t, struct uio *, int); -int _bus_dmamap_load_raw(bus_dma_tag_t, bus_dmamap_t, - bus_dma_segment_t *, int, bus_size_t, int); -void _bus_dmamap_unload(bus_dma_tag_t, bus_dmamap_t); -void _bus_dmamap_sync(bus_dma_tag_t, bus_dmamap_t, bus_addr_t, - bus_size_t, int); - -int _bus_dmamem_alloc(bus_dma_tag_t tag, bus_size_t size, - bus_size_t alignment, bus_size_t boundary, - bus_dma_segment_t *segs, int nsegs, int *rsegs, int flags); -void _bus_dmamem_free(bus_dma_tag_t tag, bus_dma_segment_t *segs, int nsegs); -int _bus_dmamem_map(bus_dma_tag_t tag, bus_dma_segment_t *segs, - int nsegs, size_t size, caddr_t *kvap, int flags); -void _bus_dmamem_unmap(bus_dma_tag_t tag, caddr_t kva, - size_t size); -vm_offset_t _bus_dmamem_mmap(bus_dma_tag_t tag, - bus_dma_segment_t *segs, - int nsegs, off_t off, int prot, int flags); - -int _bus_dmamem_alloc_range(bus_dma_tag_t tag, bus_size_t size, - bus_size_t alignment, bus_size_t boundary, - bus_dma_segment_t *segs, int nsegs, int *rsegs, int flags, - vm_offset_t low, vm_offset_t high); - -#endif /* _MACPPC_BUS_DMA_PRIVATE */ + * alignment: alignment for segments. + * boundary: Boundary that segments cannot cross. + * lowaddr: Low restricted address that cannot appear in a mapping. + * highaddr: High restricted address that cannot appear in a mapping. + * filtfunc: An optional function to further test if an address + * within the range of lowaddr and highaddr cannot appear + * in a mapping. + * filtfuncarg: An argument that will be passed to filtfunc in addition + * to the address to test. + * maxsize: Maximum mapping size supported by this tag. + * nsegments: Number of discontinuities allowed in maps. + * maxsegsz: Maximum size of a segment in the map. + * flags: Bus DMA flags. + * dmat: A pointer to set to a valid dma tag should the return + * value of this function indicate success. + */ +int bus_dma_tag_create(bus_dma_tag_t parent, bus_size_t alignment, + bus_size_t boundary, bus_addr_t lowaddr, + bus_addr_t highaddr, bus_dma_filter_t *filtfunc, + void *filtfuncarg, bus_size_t maxsize, int nsegments, + bus_size_t maxsegsz, int flags, bus_dma_tag_t *dmat); + +int bus_dma_tag_destroy(bus_dma_tag_t dmat); + +/* + * Allocate a handle for mapping from kva/uva/physical + * address space into bus device space. + */ +int bus_dmamap_create(bus_dma_tag_t dmat, int flags, bus_dmamap_t *mapp); + +/* + * Destroy a handle for mapping from kva/uva/physical + * address space into bus device space. + */ +int bus_dmamap_destroy(bus_dma_tag_t dmat, bus_dmamap_t map); + +/* + * Allocate a piece of memory that can be efficiently mapped into + * bus device space based on the constraints lited in the dma tag. + * A dmamap to for use with dmamap_load is also allocated. + */ +int bus_dmamem_alloc(bus_dma_tag_t dmat, void** vaddr, int flags, + bus_dmamap_t *mapp); + +/* + * Free a piece of memory and it's allociated dmamap, that was allocated + * via bus_dmamem_alloc. + */ +void bus_dmamem_free(bus_dma_tag_t dmat, void *vaddr, bus_dmamap_t map); + +/* + * A function that processes a successfully loaded dma map or an error + * from a delayed load map. + */ +typedef void bus_dmamap_callback_t(void *, bus_dma_segment_t *, int, int); + +/* + * Map the buffer buf into bus space using the dmamap map. + */ +int bus_dmamap_load(bus_dma_tag_t dmat, bus_dmamap_t map, void *buf, + bus_size_t buflen, bus_dmamap_callback_t *callback, + void *callback_arg, int flags); + +/* + * Perform a syncronization operation on the given map. + */ +void bus_dmamap_sync(bus_dma_tag_t, bus_dmamap_t, bus_dmasync_op_t); + +/* + * Release the mapping held by map. + */ +void bus_dmamap_unload(bus_dma_tag_t dmat, bus_dmamap_t map); #endif /* _MACPPC_BUS_H_ */ |