diff options
Diffstat (limited to 'freebsd/sys/sys/bus_dma.h')
| -rw-r--r-- | freebsd/sys/sys/bus_dma.h | 115 |
1 files changed, 86 insertions, 29 deletions
diff --git a/freebsd/sys/sys/bus_dma.h b/freebsd/sys/sys/bus_dma.h index 0dad3267..6fbac13b 100644 --- a/freebsd/sys/sys/bus_dma.h +++ b/freebsd/sys/sys/bus_dma.h @@ -109,8 +109,14 @@ */ #define BUS_DMA_KEEP_PG_OFFSET 0x400 +#define BUS_DMA_LOAD_MBUF 0x800 + /* Forwards needed by prototypes below. */ +union ccb; +struct bio; struct mbuf; +struct memdesc; +struct pmap; struct uio; /* @@ -191,6 +197,56 @@ typedef void bus_dmamap_callback_t(void *, bus_dma_segment_t *, int, int); typedef void bus_dmamap_callback2_t(void *, bus_dma_segment_t *, int, bus_size_t, 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); + +/* + * Like bus_dmamap_load but for mbufs. Note the use of the + * bus_dmamap_callback2_t interface. + */ +int bus_dmamap_load_mbuf(bus_dma_tag_t dmat, bus_dmamap_t map, + struct mbuf *mbuf, + bus_dmamap_callback2_t *callback, void *callback_arg, + int flags); + +int bus_dmamap_load_mbuf_sg(bus_dma_tag_t dmat, bus_dmamap_t map, + struct mbuf *mbuf, bus_dma_segment_t *segs, + int *nsegs, int flags); + +/* + * Like bus_dmamap_load but for uios. Note the use of the + * bus_dmamap_callback2_t interface. + */ +int bus_dmamap_load_uio(bus_dma_tag_t dmat, bus_dmamap_t map, + struct uio *ui, + bus_dmamap_callback2_t *callback, void *callback_arg, + int flags); + +/* + * Like bus_dmamap_load but for cam control blocks. + */ +int bus_dmamap_load_ccb(bus_dma_tag_t dmat, bus_dmamap_t map, union ccb *ccb, + bus_dmamap_callback_t *callback, void *callback_arg, + int flags); + +/* + * Like bus_dmamap_load but for bios. + */ +int bus_dmamap_load_bio(bus_dma_tag_t dmat, bus_dmamap_t map, struct bio *bio, + bus_dmamap_callback_t *callback, void *callback_arg, + int flags); + +/* + * Loads any memory descriptor. + */ +int bus_dmamap_load_mem(bus_dma_tag_t dmat, bus_dmamap_t map, + struct memdesc *mem, bus_dmamap_callback_t *callback, + void *callback_arg, int flags); + +/* * XXX sparc64 uses the same interface, but a much different implementation. * <machine/bus_dma.h> for the sparc64 arch contains the equivalent * declarations. @@ -224,35 +280,6 @@ int bus_dmamem_alloc(bus_dma_tag_t dmat, void** vaddr, int flags, void bus_dmamem_free(bus_dma_tag_t dmat, void *vaddr, bus_dmamap_t map); /* - * 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); - -/* - * Like bus_dmamap_load but for mbufs. Note the use of the - * bus_dmamap_callback2_t interface. - */ -int bus_dmamap_load_mbuf(bus_dma_tag_t dmat, bus_dmamap_t map, - struct mbuf *mbuf, - bus_dmamap_callback2_t *callback, void *callback_arg, - int flags); - -int bus_dmamap_load_mbuf_sg(bus_dma_tag_t dmat, bus_dmamap_t map, - struct mbuf *mbuf, bus_dma_segment_t *segs, - int *nsegs, int flags); - -/* - * Like bus_dmamap_load but for uios. Note the use of the - * bus_dmamap_callback2_t interface. - */ -int bus_dmamap_load_uio(bus_dma_tag_t dmat, bus_dmamap_t map, - struct uio *ui, - bus_dmamap_callback2_t *callback, void *callback_arg, - int flags); - -/* * Perform a synchronization operation on the given map. */ void _bus_dmamap_sync(bus_dma_tag_t, bus_dmamap_t, bus_dmasync_op_t); @@ -272,6 +299,36 @@ void _bus_dmamap_unload(bus_dma_tag_t dmat, bus_dmamap_t map); _bus_dmamap_unload(dmat, dmamap); \ } while (0) +/* + * The following functions define the interface between the MD and MI + * busdma layers. These are not intended for consumption by driver + * software. + */ +void __bus_dmamap_waitok(bus_dma_tag_t dmat, bus_dmamap_t map, + struct memdesc *mem, + bus_dmamap_callback_t *callback, + void *callback_arg); + +#define _bus_dmamap_waitok(dmat, map, mem, callback, callback_arg) \ + do { \ + if ((map) != NULL) \ + __bus_dmamap_waitok(dmat, map, mem, callback, \ + callback_arg); \ + } while (0); + +int _bus_dmamap_load_buffer(bus_dma_tag_t dmat, bus_dmamap_t map, + void *buf, bus_size_t buflen, struct pmap *pmap, + int flags, bus_dma_segment_t *segs, int *segp); + +int _bus_dmamap_load_phys(bus_dma_tag_t dmat, bus_dmamap_t map, + vm_paddr_t paddr, bus_size_t buflen, + int flags, bus_dma_segment_t *segs, int *segp); + +bus_dma_segment_t *_bus_dmamap_complete(bus_dma_tag_t dmat, + bus_dmamap_t map, + bus_dma_segment_t *segs, + int nsegs, int error); + #endif /* __sparc64__ */ #endif /* _BUS_DMA_H_ */ |