ddi_dma_buf_setup(9f)

1ddi_dma_buf_setup(9F)    Kernel Functions for Drivers    ddi_dma_buf_setup(9F)
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NAME

6       ddi_dma_buf_setup - easier DMA setup for use with buffer structures
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SYNOPSIS

9       #include <sys/ddi.h>
10       #include <sys/sunddi.h>
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14       int ddi_dma_buf_setup(dev_info_t *dip, struct buf *bp, uint_t flags,
15            int (*waitfp) (caddr_t),, caddr_t arg, ddi_dma_lim_t *lim,
16            ddi_dma_handle_t *handlep);
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INTERFACE LEVEL

20       This  interface is obsolete. ddi_dma_buf_bind_handle(9F) should be used
21       instead.
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PARAMETERS

24       dip        A pointer to the device's dev_info structure.
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27       bp         A pointer to a system buffer structure (see buf(9S)).
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30       flags      Flags  that   go   into   a   ddi_dma_req   structure   (see
31                  ddi_dma_req(9S)).
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34       waitfp     The  address  of  a function to call back later if resources
35                  aren't  available  now.  The  special   function   addresses
36                  DDI_DMA_SLEEP and DDI_DMA_DONTWAIT (see ddi_dma_req(9S)) are
37                  taken to mean, respectively, wait until resources are avail‐
38                  able, or do not wait at all and do not schedule a callback.
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41       arg        Argument  to  be  passed  to  a callback function, if such a
42                  function is specified.
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45       lim        A pointer to a DMA limits structure  for  this  device  (see
46                  ddi_dma_lim_sparc(9S)   or   ddi_dma_lim_x86(9S)).  If  this
47                  pointer is NULL, a default set of DMA limits is assumed.
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50       handlep    Pointer to a DMA handle. See ddi_dma_setup(9F) for a discus‐
51                  sion of handle.
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DESCRIPTION

55       The  ddi_dma_buf_setup() function is an interface to ddi_dma_setup(9F).
56       It uses its arguments to construct an appropriate ddi_dma_req structure
57       and calls ddi_dma_setup() with it.
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RETURN VALUES

60       See ddi_dma_setup(9F) for the possible return values for this function.
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CONTEXT

63       The ddi_dma_buf_setup() function can be called from user, interrupt, or
64       kernel context, except when waitfp is set to  DDI_DMA_SLEEP,  in  which
65       case it cannot be called from interrupt context.
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ATTRIBUTES

68       See attributes(5) for a description of the following attributes:
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73       ┌─────────────────────────────┬─────────────────────────────┐
74       │      ATTRIBUTE TYPE         │      ATTRIBUTE VALUE        │
75       ├─────────────────────────────┼─────────────────────────────┤
76       │Stability Level              │Obsolete                     │
77       └─────────────────────────────┴─────────────────────────────┘
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