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| Kernel Functions for Drivers | ddi_dma_buf_setup(9F) |
| | ddi_dma_buf_setup - easier DMA setup for use with buffer structures |
SYNOPSIS
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#include <sys/ddi.h>
#include <sys/sunddi.h>
int ddi_dma_buf_setup(dev_info_t *dip, struct buf *bp, uint_t flags, int (*waitfp) (caddr_t),, caddr_t arg, ddi_dma_lim_t *lim, ddi_dma_handle_t *handlep); |
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Solaris DDI specific (Solaris DDI).
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dip
- A pointer to the device's dev_info structure.
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bp
- A pointer to a system buffer structure (see buf(9S)).
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flags
- Flags that go into a ddi_dma_req structure (see ddi_dma_req(9S)).
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waitfp
- The address of a function to call back later if resources aren't available now. The special function addresses DDI_DMA_SLEEP and DDI_DMA_DONTWAIT (see ddi_dma_req(9S)) are taken to mean, respectively, wait until resources are available, or do not wait at all and do not schedule a callback.
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arg
- Argument to be passed to a callback function, if such a function is specified.
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lim
- A pointer to a DMA limits structure for this device (see ddi_dma_lim_sparc(9S) or ddi_dma_lim_x86(9S)). If this pointer is NULL, a default set of DMA limits is assumed.
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handlep
- Pointer to a DMA handle. See ddi_dma_setup(9F) for a discussion of handle.
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ddi_dma_buf_setup() is an interface to ddi_dma_setup(9F).
It uses its arguments to construct an appropriate ddi_dma_req structure and calls ddi_dma_setup() with it.
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ddi_dma_buf_setup() can be called from user or interrupt context, except when waitfp is set to DDI_DMA_SLEEP, in
which case it can be called from user context only.
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