e4e61333ff
eradication in/from userland path, countless locking fixes, etc.
- General sleep call through msleep(9) has been converted to condvar(9)
with better consistencies.
- Heavily guard every possible "slow path" entries (open(), close(),
few ioctl()s, sysctls), but once it entering "fast path" (io, interrupt
started), they are free to fly on their own.
- Rearrange locking sequences, resulting better concurrency and
serialization. Large part doesn't even need locking at all, and will be
removed in future. Less clutter, except in few places due to lock
ordering.
- Anonymous mixer object creation/deletion to simplify mixer handling
beyond typical mixer ioctls.
Submitted by: chibis (with modifications)
- Add few mix_[get|set|..] functions to avoid calling mixer_ioctl()
directly using cryptic arguments.
- Locking fixes to avoid possible deadlock with (still under Giant) USB.
- Better simplex/duplex device handling.
- Recover mmap() functionality for recording, which has been lost
since 2.2.x - 3.x (the introduction of newpcm). Full-duplex mmap still
doesn't work (due to VM/page design), but people still can mmap
both by opening each direction separately. mmaped playback is guarantee
to work either way.
- New sysctl: "hw.snd.compat_linux_mmap" to allow PROT_EXEC page
mapping, due to recent changes in linux compatibility layer which
require it. All linux applications that using sound + mmap() (mostly games)
require this to be enabled. Disabled by default.
- Other goodies.. too many, that will increase releng7 shareholder value
and make users of releng6 (and below) cry ;)
* This commit should be atomic. If anything goes wrong (not counting problem
originated from elsewhere), I will not hesitate to revert everything back
within 12 hours. This substantial changes itself not a rocket science
and the process has begun for almost 2 years, and lots of incremental
changes are already in place during that period of time.
* Some issues does occur in snd_emu10kx (note the 'x') due to various
internal locking issues and it is currently being worked on by chibis.
Tested by: chibis (Yuriy Tsibizov), joel, Alexandre Vieira,
many innocent souls...
76 lines
3.3 KiB
C
76 lines
3.3 KiB
C
/*-
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* Copyright (c) 1999 Cameron Grant <cg@freebsd.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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struct snd_mixer *mixer_create(device_t dev, kobj_class_t cls, void *devinfo,
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const char *desc);
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int mixer_delete(struct snd_mixer *m);
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int mixer_init(device_t dev, kobj_class_t cls, void *devinfo);
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int mixer_uninit(device_t dev);
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int mixer_reinit(device_t dev);
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int mixer_ioctl_cmd(struct cdev *i_dev, u_long cmd, caddr_t arg, int mode, struct thread *td, int from);
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int mixer_oss_mixerinfo(struct cdev *i_dev, oss_mixerinfo *mi);
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int mixer_hwvol_init(device_t dev);
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void mixer_hwvol_mute(device_t dev);
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void mixer_hwvol_step(device_t dev, int left_step, int right_step);
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int mixer_busy(struct snd_mixer *m);
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int mix_set(struct snd_mixer *m, u_int dev, u_int left, u_int right);
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int mix_get(struct snd_mixer *m, u_int dev);
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int mix_setrecsrc(struct snd_mixer *m, u_int32_t src);
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u_int32_t mix_getrecsrc(struct snd_mixer *m);
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int mix_get_type(struct snd_mixer *m);
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void mix_setdevs(struct snd_mixer *m, u_int32_t v);
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void mix_setrecdevs(struct snd_mixer *m, u_int32_t v);
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u_int32_t mix_getdevs(struct snd_mixer *m);
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u_int32_t mix_getrecdevs(struct snd_mixer *m);
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void mix_setparentchild(struct snd_mixer *m, u_int32_t parent, u_int32_t childs);
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void mix_setrealdev(struct snd_mixer *m, u_int32_t dev, u_int32_t realdev);
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u_int32_t mix_getparent(struct snd_mixer *m, u_int32_t dev);
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u_int32_t mix_getchild(struct snd_mixer *m, u_int32_t dev);
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void *mix_getdevinfo(struct snd_mixer *m);
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extern int mixer_count;
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#define MIXER_CMD_DIRECT 0 /* send command within driver */
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#define MIXER_CMD_CDEV 1 /* send command from cdev/ioctl */
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#define MIXER_TYPE_PRIMARY 0 /* mixer_init() */
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#define MIXER_TYPE_SECONDARY 1 /* mixer_create() */
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/*
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* this is a kludge to allow hiding of the struct snd_mixer definition
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* 512 should be enough for all architectures
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*/
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#define MIXER_SIZE (512 + sizeof(struct kobj) + \
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sizeof(oss_mixer_enuminfo))
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#define MIXER_DECLARE(name) static DEFINE_CLASS(name, name ## _methods, MIXER_SIZE)
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