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

6       ldi_aread,  ldi_awrite - Issue an asynchronous read or write request to
7       a device
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SYNOPSIS

10       #include <sys/sunldi.h>
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12       int ldi_aread(ldi_handle_t lh,  struct aio_req *aio_reqp, cred_t *cr);
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15       int  ldi_awrite(ldi_handle_t lh,  struct aio_req *aio_reqp, cred_t *cr);
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PARAMETERS

19       lh           Layered handle.
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22       cr           Pointer to a credential structure.
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25       aio_reqp     Pointer to the aio_req(9S) structure that describes  where
26                    the data is to be stored or obtained from.
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DESCRIPTION

30       The  ldi_awrite()  function  passes  an asynchronous write request to a
31       device entry point specified by the layered handle. This  operation  is
32       supported for block and character devices.
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35       The  ldi_aread()  function  passes  an  asynchronous  read request to a
36       device entry point specified by the layered handle. This  operation  is
37       supported for block and character devices.
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RETURN VALUES

40       The  ldi_awrite() and ldi_aread() functions return 0 upon success. If a
41       failure occurs before the request is passed on to the device, the  pos‐
42       sible  return  values are shown below. Otherwise any other error number
43       may be returned by the device.
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45       EINVAL     Invalid input parameters.
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48       ENOTSUP    Operation is not supported for this device.
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CONTEXT

52       These functions may be called from user context.
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56SunOS 5.11                        3 June 2003                    ldi_aread(9F)