LDI_DEVMAP(9F) Kernel Functions for Drivers LDI_DEVMAP(9F)

NAME

ldi_devmap - Issue a devmap request to a device

SYNOPSIS

#include <sys/sunldi.h>

int ldi_devmap(ldi_handle_t lh, devmap_cookie_t dhp, offset_t off,
size_t len, size_t *maplen, uint_t model);

PARAMETERS

lh
Layered handle.


dhp
Opaque mapping handle used by the system to describe mapping.


off
User offset within the logical device memory at which mapping
begins.


len
Mapping length (in bytes).


maplen
Pointer to length (in bytes) of validated mapping. (Less than
or equal to len).


model
Data model type of current thread.

DESCRIPTION

The ldi_devmap() function passes an devmap request to the device entry
point for the device specified by the layered handle. This operation is
supported for character devices.

RETURN VALUES

The ldi_devmap() function returns 0 upon success. If a failure occurs
before the request is passed to the device, possible return values are
shown below. Otherwise any other error number may be returned by the
device.

EINVAL
Invalid input parameters.


ENOTSUP
Operation is not supported for this device.

CONTEXT

This function may be called from user or kernel context.


June 3, 2003 LDI_DEVMAP(9F)