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| -rw-r--r-- | sys/sys/bus.h | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/sys/sys/bus.h b/sys/sys/bus.h index c73b65f..ddeda99 100644 --- a/sys/sys/bus.h +++ b/sys/sys/bus.h @@ -421,6 +421,33 @@ int bus_data_generation_check(int generation); void bus_data_generation_update(void); /** + * Some convenience defines for probe routines to return. These are just + * suggested values, and there's nothing magical about them. + * BUS_PROBE_SPECIFIC is for devices that cannot be reprobed, and that no + * possible other driver may exist (typically legacy drivers who don't fallow + * all the rules, or special needs drivers). BUS_PROBE_VENDOR is the + * suggested value that vendor supplied drivers use. This is for source or + * binary drivers that are not yet integrated into the FreeBSD tree. Its use + * in the base OS is prohibited. BUS_PROBE_DEFAULT is the normal return value + * for drivers to use. It is intended that nearly all of the drivers in the + * tree should return this value. BUS_PROBE_LOW_PRIORITY are for drivers that + * have special requirements like when there are two drivers that support + * overlapping series of hardware devices. In this case the one that supports + * the older part of the line would return this value, while the one that + * supports the newer ones would return BUS_PROBE_DEFAULT. BUS_PROBE_GENERIC + * is for drivers that wish to have a generic form and a specialized form, + * like is done with the pci bus and the acpi pci bus. BUS_PROBE_HOOVER is + * for those busses that implement a generic device place-holder for devices on + * the bus that have no more specific driver for them (aka ugen). + */ +#define BUS_PROBE_SPECIFIC 0 /* Only I can use this device */ +#define BUS_PROBE_VENDOR (-10) /* Vendor supplied driver */ +#define BUS_PROBE_DEFAULT (-20) /* Base OS default driver */ +#define BUS_PROBE_LOW_PRIORITY (-40) /* Older, less desirable drivers */ +#define BUS_PROBE_GENERIC (-100) /* generic driver for dev */ +#define BUS_PROBE_HOOVER (-500) /* Generic dev for all devs on bus */ + +/** * Shorthand for constructing method tables. */ #define DEVMETHOD KOBJMETHOD |
