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authorIan Moffett <ian@osmora.org>2024-06-24 22:55:29 -0400
committerIan Moffett <ian@osmora.org>2024-06-24 22:55:29 -0400
commit236963e7563be3e3f8220dac7bb4af446928e194 (patch)
treee521ea226db0345bbb3679fffe09d96254b7dc73 /share/man/man9/device.9
parent214eadc62b5578f76c98a38a28f8b3d80ac4d6ad (diff)
Clean out for expt
Signed-off-by: Ian Moffett <ian@osmora.org>
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-.\" Copyright (c) 2023-2024 Ian Marco Moffett and the Osmora Team.
-.\" All rights reserved.
-.\"
-.\" Redistribution and use in source and binary forms, with or without
-.\" modification, are permitted provided that the following conditions are met:
-.\"
-.\" 1. Redistributions of source code must retain the above copyright notice,
-.\" this list of conditions and the following disclaimer.
-.\" 2. Redistributions in binary form must reproduce the above copyright
-.\" notice, this list of conditions and the following disclaimer in the
-.\" documentation and/or other materials provided with the distribution.
-.\" 3. Neither the name of Hyra nor the names of its
-.\" contributors may be used to endorse or promote products derived from
-.\" this software without specific prior written permission.
-.\"
-.\" THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
-.\" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
-.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
-.\" ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
-.\" LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
-.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
-.\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
-.\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
-.\" CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
-.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
-.\" POSSIBILITY OF SUCH DAMAGE.
-.Dd Apr 29 2024
-.Dt DEVICE 9
-.Os Hyra
-.Sh NAME
-.Nm device - hyra device subsystem
-.Sh SYNOPSIS
-.In sys/device.h
-.Sh DESCRIPTION
-Devices registered with the kernel are represented by the device structure:
-
-.Bd -literal
-struct device {
- dev_t major, minor;
- size_t blocksize;
- int(*write)(struct device *dev, struct sio_txn *sio);
- int(*read)(struct device *dev, struct sio_txn *sio);
- int(*ioctl)(struct device *dev, uint32_t cmd, uintptr_t arg);
- ...
- TAILQ_ENTRY(device) link;
-};
-.Ed
-
-Device instances are to be allocated with the
-.Ft device_alloc()
-function. These instances are registered with the kernel by the
-.Ft device_create()
-function.
-
-The major number identifies the driver and the minor number identifies
-the device itself. The major number must be allocated with the
-.Ft device_alloc_major()
-function.
-
-If the device blocksize is greater than 1, this device is considered a block
-device, otherwise if it is 1, it is considered a character device.
-
-.Sh AUTHORS
-.An Ian Moffett Aq Mt ian@osmora.org