diff options
Diffstat (limited to 'sys/amd64/include/bus_dma.h')
| -rw-r--r-- | sys/amd64/include/bus_dma.h | 18 |
1 files changed, 17 insertions, 1 deletions
diff --git a/sys/amd64/include/bus_dma.h b/sys/amd64/include/bus_dma.h index 6a434cf..b0928f1 100644 --- a/sys/amd64/include/bus_dma.h +++ b/sys/amd64/include/bus_dma.h @@ -132,6 +132,17 @@ typedef struct bus_dma_segment { typedef int bus_dma_filter_t(void *, bus_addr_t); /* + * A function that performs driver-specific syncronization on behalf of + * busdma. + */ +typedef enum { + BUS_DMA_LOCK = 0x01, + BUS_DMA_UNLOCK = 0x02, +} bus_dma_lock_op_t; + +typedef void bus_dma_lock_t(void *, bus_dma_lock_op_t); + +/* * Allocate a device specific dma_tag encapsulating the constraints of * the parent tag in addition to other restrictions specified: * @@ -156,7 +167,8 @@ 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); + bus_size_t maxsegsz, int flags, bus_dma_lock_t *lockfunc, + void *lockfuncarg, bus_dma_tag_t *dmat); int bus_dma_tag_destroy(bus_dma_tag_t dmat); @@ -238,4 +250,8 @@ void _bus_dmamap_unload(bus_dma_tag_t dmat, bus_dmamap_t map); if ((dmamap) != NULL) \ _bus_dmamap_unload(dmat, dmamap) +/* + * Generic helper function for manipulating mutexes. + */ +void busdma_lock_mutex(void *arg, bus_dma_lock_op_t op); #endif /* _AMD64_BUS_DMA_H_ */ |
