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Man Pages


Manual Reference Pages  -  BUS_DEACTIVATE_RESOURCE (9)

NAME

bus_activate_resource, bus_deactivate_resource - activate or deactivate a resource

CONTENTS

Synopsis
Description
Return Values
See Also
Authors

SYNOPSIS


.In sys/param.h
.In sys/bus.h


.In machine/bus.h
.In sys/rman.h
.In machine/resource.h int
.Fo bus_activate_resource device_t dev int type int rid struct resource *r
.Fc int
.Fo bus_deactivate_resource device_t dev int type int rid struct resource *r
.Fc

DESCRIPTION

These functions activate or deactivate a previously allocated resource. In general, resources must be activated before they can be accessed by the driver so that the bus driver can map the resource into the devices space.

The arguments are as follows:
dev The device that requests ownership of the resource. Before allocation, the resource is owned by the parent bus.
type The type of resource you want to allocate. It is one of:

SYS_RES_IRQ for IRQs
SYS_RES_DRQ for ISA DMA lines
SYS_RES_IOPORT
  for I/O ports
SYS_RES_MEMORY
  for I/O memory
rid A pointer to a bus specific handle that identifies the resource being allocated.
r A pointer to the
.Vt struct resource returned by bus_alloc_resource(9).

RETURN VALUES

Zero is returned on success, otherwise an error is returned.

SEE ALSO

bus_alloc_resource(9), device(9), driver(9)

AUTHORS

This manual page was written by
.An Warner Losh Aq imp@FreeBSD.org .
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