| device_add_child.9 (108257) | device_add_child.9 (121380) |
|---|---|
| 1.\" -*- nroff -*- 2.\" 3.\" Copyright (c) 1998 Doug Rabson 4.\" 5.\" All rights reserved. 6.\" 7.\" This program is free software. 8.\" --- 12 unchanged lines hidden (view full) --- 21.\" IN NO EVENT SHALL THE DEVELOPERS BE LIABLE FOR ANY DIRECT, INDIRECT, 22.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 23.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 24.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 25.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 26.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 27.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28.\" | 1.\" -*- nroff -*- 2.\" 3.\" Copyright (c) 1998 Doug Rabson 4.\" 5.\" All rights reserved. 6.\" 7.\" This program is free software. 8.\" --- 12 unchanged lines hidden (view full) --- 21.\" IN NO EVENT SHALL THE DEVELOPERS BE LIABLE FOR ANY DIRECT, INDIRECT, 22.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 23.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 24.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 25.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 26.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 27.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28.\" |
| 29.\" $FreeBSD: head/share/man/man9/device_add_child.9 108257 2002-12-24 13:41:48Z ru $ | 29.\" $FreeBSD: head/share/man/man9/device_add_child.9 121380 2003-10-23 01:54:06Z hmp $ |
| 30.\" 31.Dd June 16, 1998 32.Dt DEVICE_ADD_CHILD 9 33.Os 34.Sh NAME 35.Nm device_add_child , 36.Nm device_add_child_ordered 37.Nd "add a new device as a child of an existing device" --- 14 unchanged lines hidden (view full) --- 52arguments specify the name and unit number of the device. 53If the name is unknown then the caller should pass 54.Dv NULL . 55If the unit is unknown then the caller should pass 56.Dv -1 57and the system will choose the next available unit number. 58.Pp 59The name of the device is used to determine which drivers might be | 30.\" 31.Dd June 16, 1998 32.Dt DEVICE_ADD_CHILD 9 33.Os 34.Sh NAME 35.Nm device_add_child , 36.Nm device_add_child_ordered 37.Nd "add a new device as a child of an existing device" --- 14 unchanged lines hidden (view full) --- 52arguments specify the name and unit number of the device. 53If the name is unknown then the caller should pass 54.Dv NULL . 55If the unit is unknown then the caller should pass 56.Dv -1 57and the system will choose the next available unit number. 58.Pp 59The name of the device is used to determine which drivers might be |
| 60appropriate for the device. If a name is specified then only drivers 61of that name are probed. If no name is given then all drivers for the | 60appropriate for the device. 61If a name is specified then only drivers of that name are probed. 62If no name is given then all drivers for the |
| 62owning bus are probed. 63.Pp 64This allows busses which can uniquely identify device instances (such 65as PCI) to allow each driver to check each device instance for a | 63owning bus are probed. 64.Pp 65This allows busses which can uniquely identify device instances (such 66as PCI) to allow each driver to check each device instance for a |
| 66match. For busses which rely on supplied probe hints where only one | 67match. 68For busses which rely on supplied probe hints where only one |
| 67driver can have a change of probing the device, the driver name should 68specified as the device name. 69.Pp 70Normally unit numbers will be chosen automatically by the system and a 71unit number of 72.Dv -1 73should be given. 74When a specific unit number is desired (e.g. for wiring a particular 75piece of hardware to a pre-configured unit number), that unit should | 69driver can have a change of probing the device, the driver name should 70specified as the device name. 71.Pp 72Normally unit numbers will be chosen automatically by the system and a 73unit number of 74.Dv -1 75should be given. 76When a specific unit number is desired (e.g. for wiring a particular 77piece of hardware to a pre-configured unit number), that unit should |
| 76be passed. If the specified unit number is already allocated, a new | 78be passed. 79If the specified unit number is already allocated, a new |
| 77unit will be allocated and a diagnostic message printed. 78.Pp 79If the devices attached to a bus must be probed in a specific order 80(e.g. for the ISA bus some devices are sensitive to failed probe attempts 81of unrelated drivers and therefore must be probed first), 82the 83.Fa order 84argument of --- 14 unchanged lines hidden --- | 80unit will be allocated and a diagnostic message printed. 81.Pp 82If the devices attached to a bus must be probed in a specific order 83(e.g. for the ISA bus some devices are sensitive to failed probe attempts 84of unrelated drivers and therefore must be probed first), 85the 86.Fa order 87argument of --- 14 unchanged lines hidden --- |