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40 .Nm devctl_set_driver ,
42 .Nd device control library
48 .Fn devctl_attach "const char *device"
50 .Fn devctl_delete "const char *device" "bool force"
52 .Fn devctl_detach "const char *device" "bool force"
54 .Fn devctl_disable "const char *device" "bool force_detach"
56 .Fn devctl_enable "const char *device"
58 .Fn devctl_rescan "const char *device"
60 .Fn devctl_resume "const char *device"
62 .Fn devctl_set_driver "const char *device" "const char *driver" "bool force"
64 .Fn devctl_suspend "const char *device"
68 library adjusts the state of devices in the kernel's internal device
70 Each control operation accepts a
72 argument that identifies the device to adjust.
75 may be specified as either the name of an existing device or as a
77 The following bus-specific address formats are currently supported:
78 .Bl -tag -offset indent
79 .It Sy pci Ns Fa domain Ns : Ns Fa bus Ns : Ns Fa slot Ns : Ns Fa function
80 A PCI device with the specified
86 .It Sy pci Ns Fa bus Ns : Ns Fa slot Ns : Ns Fa function
87 A PCI device in domain zero with the specified
93 A device with an ACPI handle of
95 The handle must be specified as an absolute path and must begin with a
101 function probes a device and attaches a suitable device driver if one is
106 function detaches a device from its current device driver.
107 The device is left detached until either a new driver for its parent
108 bus is loaded or the device is explicitly probed via
113 the current device driver will be detached even if the device is busy.
117 function deletes a device from the device tree.
122 the device is deleted even if the device is physically present.
126 function disables a device.
127 If the device is currently attached to a device driver,
128 the device driver will be detached from the device,
129 but the device will retain its current name.
133 the current device driver will be detached even if the device is busy.
134 The device will remain disabled and detached until it is explicitly enabled
140 function re-enables a disabled device.
141 The device will probe and attach if a suitable device driver is found.
145 function suspends a device.
146 This may include placing the device in a reduced power state,
147 but any device driver currently attached to the device will remain attached.
151 function resumes a suspended device to a fully working state.
154 .Fn devctl_set_driver
155 function attaches a device driver named
158 If the device is already attached and
161 the request will fail.
162 If the device is already attached and
165 the device will be detached from its current device driver before it is
166 attached to the new device driver.
170 function rescans a bus device checking for devices that have been added or
173 .Rv -std devctl_attach devctl_delete devctl_detach devctl_disable \
174 devctl_enable devctl_suspend devctl_rescan devctl_resume devctl_set_driver
176 In addition to specific errors noted below,
179 functions may fail for any of the errors described in
184 The device name is too long.
186 No existing device matches the specified name or location.
188 The current process is not permitted to adjust the state of
194 function may fail if:
197 The device is already attached.
199 An internal memory allocation request failed.
201 The device is disabled.
203 No suitable driver for the device could be found,
204 or the driver failed to attach.
209 function may fail if:
212 The current device driver for
214 is busy and cannot detach at this time.
215 Note that some drivers may return this even if
219 The device is not attached to a driver.
221 The current device driver for
223 does not support detaching.
228 function may fail if:
231 The device is already enabled.
233 An internal memory allocation request failed.
235 No suitable driver for the device could be found,
236 or the driver failed to attach.
241 function may fail if:
244 The current device driver for
246 is busy and cannot detach at this time.
247 Note that some drivers may return this even if
251 The device is already disabled.
253 The current device driver for
255 does not support detaching.
260 function may fail if:
263 The device is already suspended.
265 The device to be suspended is the root bus device.
270 function may fail if:
273 The device is not suspended.
275 The device to be resumed is the root bus device.
279 .Fn devctl_set_driver
280 function may fail if:
283 The device is currently attached to a device driver and
287 The current device driver for
289 is busy and cannot detach at this time.
293 argument points outside the process' allocated address space.
295 No device driver with the requested name exists.
297 An internal memory allocation request failed.
299 The device is disabled.
301 The new device driver failed to attach.
306 function may fail if:
309 The device is not attached to a driver.
311 The bus driver does not support rescanning.
316 function may fail if:
319 The device is physically present and
324 is the root device of the device tree.
333 library first appeared in
336 If a device is suspended individually via
338 and the entire machine is subsequently suspended,
339 the device will be resumed when the machine resumes.