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request_resource(9) [centos man page]

REQUEST_RESOURCE(9)						Hardware Interfaces					       REQUEST_RESOURCE(9)

NAME
request_resource - request and reserve an I/O or memory resource SYNOPSIS
int request_resource(struct resource * root, struct resource * new); ARGUMENTS
root root resource descriptor new resource descriptor desired by caller DESCRIPTION
Returns 0 for success, negative error code on error. COPYRIGHT
Kernel Hackers Manual 3.10 June 2014 REQUEST_RESOURCE(9)

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BUS_ACTIVATE_RESOURCE(9)				   BSD Kernel Developer's Manual				  BUS_ACTIVATE_RESOURCE(9)

NAME
bus_activate_resource, bus_deactivate_resource -- activate or deactivate a resource SYNOPSIS
#include <sys/param.h> #include <sys/bus.h> #include <machine/bus.h> #include <sys/rman.h> #include <machine/resource.h> int bus_activate_resource(device_t dev, int type, int rid, struct resource *r); int bus_deactivate_resource(device_t dev, int type, int rid, struct resource *r); 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 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 Warner Losh <imp@FreeBSD.org>. BSD
March 28, 2003 BSD

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