| BUS_DESCRIBE_INTR(9) | Kernel Developer's Manual | BUS_DESCRIBE_INTR(9) |
BUS_DESCRIBE_INTR,
bus_describe_intr —
associate a description with an active interrupt
handler
#include
<sys/param.h>
#include <sys/bus.h>
int
BUS_DESCRIBE_INTR(device_t dev,
device_t child, struct resource
*irq, void *cookie, const char
*descr);
int
bus_describe_intr(device_t dev,
struct resource *irq, void
*cookie, const char *fmt,
...);
The
BUS_DESCRIBE_INTR()
method associates a description with an active interrupt handler. The
cookie parameter must be the value returned by a
successful call to BUS_SETUP_INTR(9) for the interrupt
irq.
The
bus_describe_intr()
function is a simple wrapper around
BUS_DESCRIBE_INTR(). As a convenience,
bus_describe_intr() allows the caller to use
printf(9) style formatting to build the description string
using fmt.
When an interrupt handler is established by BUS_SETUP_INTR(9), the handler is named after the device the handler is established for. This name is then used in various places such as interrupt statistics displayed by systat(1) and vmstat(8). For devices that use a single interrupt, the device name is sufficiently unique to identify the interrupt handler. However, for devices that use multiple interrupts it can be useful to distinguish the interrupt handlers. When a description is set for an active interrupt handler, a colon followed by the description is appended to the device name to form the interrupt handler name.
Zero is returned on success, otherwise an appropriate error is returned.
systat(1), vmstat(8), BUS_SETUP_INTR(9), device(9), printf(9)
The BUS_DESCRIBE_INTR() method and
bus_describe_intr() functions first appeared in
FreeBSD 8.1.
It is not currently possible to remove a description from an active interrupt handler.
| December 9, 2015 | Debian |