PCI_BUS_ALLOC_RESOUR(9) Hardware Interfaces PCI_BUS_ALLOC_RESOUR(9)NAME
pci_bus_alloc_resource - allocate a resource from a parent bus
SYNOPSIS
int pci_bus_alloc_resource(struct pci_bus * bus, struct resource * res, resource_size_t size, resource_size_t align, resource_size_t min,
unsigned int type_mask,
resource_size_t (*alignf) (void *, const struct resource *, resource_size_t, resource_size_t),
void * alignf_data);
ARGUMENTS
bus
PCI bus
res
resource to allocate
size
size of resource to allocate
align
alignment of resource to allocate
min
minimum /proc/iomem address to allocate
type_mask
IORESOURCE_* type flags
alignf
resource alignment function
alignf_data
data argument for resource alignment function
DESCRIPTION
Given the PCI bus a device resides on, the size, minimum address, alignment and type, try to find an acceptable resource allocation for a
specific device resource.
COPYRIGHT Kernel Hackers Manual 2.6. July 2010 PCI_BUS_ALLOC_RESOUR(9)
Check Out this Related Man Page
BUS_ADJUST_RESOURCE(9) BSD Kernel Developer's Manual BUS_ADJUST_RESOURCE(9)NAME
bus_adjust_resource -- adjust resource allocated from a parent bus
SYNOPSIS
#include <sys/param.h>
#include <sys/bus.h>
#include <machine/bus.h>
#include <sys/rman.h>
#include <machine/resource.h>
int
bus_adjust_resource(device_t dev, int type, struct resource *r, u_long start, u_long end);
DESCRIPTION
This function is used to ask the parent bus to adjust the resource range assigned to an allocated resource. The resource r should have been
allocated by a previous call to bus_alloc_resource(9). The new resource range must overlap the existing range of r. The type argument
should match the type argument passed to bus_alloc_resource(9) when the resource was initially allocated.
Note that none of the constraints of the original allocation request such as alignment or boundary restrictions are checked by
bus_adjust_resource(). It is the caller's responsibility to enforce any such requirements.
RETURN VALUES
The bus_adjust_resource() method returns zero on success or an error code on failure.
EXAMPLES
Grow an existing memory resource by 4096 bytes.
struct resource *res;
int error;
error = bus_adjust_resource(dev, SYS_RES_MEMORY, res,
rman_get_start(res), rman_get_end(res) + 0x1000);
ERRORS
bus_adjust_resource() will fail if:
[EINVAL] The dev device does not have a parent device.
[EINVAL] The r resource is a shared resource.
[EINVAL] The new address range does not overlap with the existing address range of r.
[EBUSY] The new address range conflicts with another allocated resource.
SEE ALSO bus_alloc_resource(9), bus_release_resource(9), device(9), driver(9)BSD April 29, 2011 BSD
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