Problem:
selwakeup required calling pfind which would cause lock order
reversals with the allproc_lock and the per-process filedesc lock.
Solution:
Instead of recording the pid of the select()'ing process into the
selinfo structure, actually record a pointer to the thread. To
avoid dereferencing a bad address all the selinfo structures that
are in use by a thread are kept in a list hung off the thread
(protected by sellock). When a selwakeup occurs the selinfo is
removed from that threads list, it is also removed on the way out
of select or poll where the thread will traverse its list removing
all the selinfos from its own list.
Problem:
Previously the PROC_LOCK was used to provide the mutual exclusion
needed to ensure proper locking, this couldn't work because there
was a single condvar used for select and poll and condvars can
only be used with a single mutex.
Solution:
Introduce a global mutex 'sellock' which is used to provide mutual
exclusion when recording events to wait on as well as performing
notification when an event occurs.
Interesting note:
schedlock is required to manipulate the per-thread TDF_SELECT
flag, however if given its own field it would not need schedlock,
also because TDF_SELECT is only manipulated under sellock one
doesn't actually use schedlock for syncronization, only to protect
against corruption.
Proc locks are no longer used in select/poll.
Portions contributed by: davidc
Note ALL MODULES MUST BE RECOMPILED
make the kernel aware that there are smaller units of scheduling than the
process. (but only allow one thread per process at this time).
This is functionally equivalent to teh previousl -current except
that there is a thread associated with each process.
Sorry john! (your next MFC will be a doosie!)
Reviewed by: peter@freebsd.org, dillon@freebsd.org
X-MFC after: ha ha ha ha
other "system" header files.
Also help the deprecation of lockmgr.h by making it a sub-include of
sys/lock.h and removing sys/lockmgr.h form kernel .c files.
Sort sys/*.h includes where possible in affected files.
OK'ed by: bde (with reservations)
Fixes bugs in devfs when unloading and reloading
Syncs with NetBSD changes
Submitted by: Alexander Langer <alex@big.endian.de>
Submitted by: Thomas Klausner <wiz@netbsd.org>
Submitted by: Daniel O'Connor" <doconnor@gsoft.com.au>
Main change is the addition of the bktr_mem module.
This holds onto the bktr driver's contiguously allocated memory
when the bktr driver is unloaded and reloaded.
This has to be done because it is virtually impossible to get
contiguous memory once a system is running.
Also tidied up the use of SMBUS, added a new Hauppauge tuner type (0x2c)
and a new Flyvideo vendor ID.
cloning infrastructure standard in kern_conf. Modules are now
the same with or without devfs support.
If you need to detect if devfs is present, in modules or elsewhere,
check the integer variable "devfs_present".
This happily removes an ugly hack from kern/vfs_conf.c.
This forces a rename of the eventhandler and the standard clone
helper function.
Include <sys/eventhandler.h> in <sys/conf.h>: it's a helper #include
like <sys/queue.h>
Remove all #includes of opt_devfs.h they no longer matter.
This merges in changes from NetBSD which ensure bktr0
(actually bktr%d) is printed at the start of any output lines.
Submitted by: Thomas Klausner <wiz@danbala.ifoer.tuwien.ac.at>
- The driver now uses bus_space() and runs on NetBSD 1.4.2
Submitted by Thomas Klausner <wiz@danbala.ifoer.tuwien.ac.at>
- Remove startup quirks for video and vbi capture for PAL users.
PAL TV users can now run FXTV and Alevt in any order.
- Add support for cable channels >100
Submitted by Scott Presnell <srp@zgi.com>
- New MSP3410/3415 setup code added. This is experimental.
Please set the sysctl hw.bt848.slow_msp_audio to 1 for this.
Submitted by Frank Nobis<fn@radio-do.de>
There seems to be some problem with the new rgb_vbi_prog() RISC
code not working for NTSC users.
This means that European teletext users will need to start
Alevt (or open /dev/vbi0) BEFORE starting FXTV (or opening /dev/bktr0)
if they want to capture VBI data for Teletext/Videotext or WaveTop
Reported by: Chris Csanady <cc@137.org>, Kenneth D. Merry <ken@kdm.org>,
Randy Bush <randy@psg.com>
Make tuner on French SECAM Hauppauge cards work
Submitted by: Cyrille Lefevre <clefevre@citeweb.net>
Fix clipping bugs ready for Xv support in XFree86 4.0
Submitted by: Thomas Mueller <tmueller@thmu.de>
Fix the 'feature' where /dev/vbi needed to be opened before /dev/bktr
when using Teletext with Alevt and FXTV.
Requested by: Randall Hopper
Update AverMedia GPIO values
Submitted by: AverMedia
Add support for WinTV Theater Dolby Surround Sound DPL3518A chip
Submitted by: Frank Nobis <fn@radio-do.de>
Make PLL mode the default for Bt878s. You no longer need options BKTR_USE_PLL
have been there in the first place. A GENERIC kernel shrinks almost 1k.
Add a slightly different safetybelt under nostop for tty drivers.
Add some missing FreeBSD tags
Phase 1) move the driver
Phase 2)
Phase 3) Profit, by splitting the driver into smaller files like
bktr_tuner, bktr_card, bktr_audio, bktr_<osname>
making it easier to maintain and understand.
Bug fix: xmradio nolonger experiences a 6Mhz offset after running FXTV
New feature: Automatic Tuner selection for AVerMedia cards with
configuration EEPROMs on (ie the Bt878 based cards)
Fix a bug where video capture locks up on channel changes.
Many thanks to Juha for solving this.
Submitted by: Juha Nurmela <Juha.Nurmela@quicknet.inet.fi>
New Features:
Greatly improved VBI capture support. (mainly for the AleVT port)
Supports select() on /dev/vbi
Improved RISC program for RGB+VBI capture to capture both evenodd
VBI data even when only capturing even only (or odd only) video
Based on code from Juha Nurmela <Juha.Nurmela@quicknet.inet.fi>
Support for Hauppauge 627 and Temic 4006
Submitted by: Maurice Castro <maurice@atum.castro.aus.net>
Bug Fix:
Fix bug in AverMedia card detection.
This fixes, at least, panics in ncr_attach() on i386's with about 5MB
of memory. The restriction was a hack to leave some low memory for ISA
DMA, but on i386's we now allocate pages from the top down, so all the
restriction did was cause our allocations to fail when there is no free
memory above 1MB.
Diskslice/label code not yet handled.
Vinum, i4b, alpha, pc98 not dealt with (left to respective Maintainers)
Add the correct hook for devfs to kern_conf.c
The net result of this excercise is that a lot less files depends on DEVFS,
and devtoname() gets more sensible output in many cases.
A few drivers had minor additional cleanups performed relating to cdevsw
registration.
A few drivers don't register a cdevsw{} anymore, but only use make_dev().
Change number of VBI lines from 16 to 12 for NTSC formats.
Juha.Nurmela@quicknet.inet.fi found/fixed bug in VBI_SLEEP.
New features
MSP3430G DBX initialisation from Matt Brown <matt@dqc.org>
STB Bt878 card identification.
Hauppauge Model Number identification.
Changes to probeCard() for better eeprom identification.
Experimental TDA9850 initialisation code, from Linux bttv.
Cross Platform Changes
The driver has been reorgainsed based ideas from Brad Parker's port to Linux
to seperate OS Dependant and Independant sections.
I have backends for FreeBSD 2.2.x/3.x and 4.x newbus, BSDI, OpenBSD and NetBSD.
This commit has FreeBSD 2.2.8/2.2-stable/3.x and FreeBSD 4.x newbus backends.
Some code submitted by: Juha.Nurmela@quicknet.inet.fi
Matt Brown <matt@dqc.org>
Brad Parker <brad@parker.boston.ma.us>
Some code obtained from: Linux bttv driver
Also removed the BSDI support (for now)
This allows the driver to be loaded/unloaded as a KLD
and loaded in the boot loader phase whithout making a custom kernel.
The cdevsw_add() function now finds the major number(s) in the
struct cdevsw passed to it. cdevsw_add_generic() is no longer
needed, cdevsw_add() does the same thing.
cdevsw_add() will print an message if the d_maj field looks bogus.
Remove nblkdev and nchrdev variables. Most places they were used
bogusly. Instead check a dev_t for validity by seeing if devsw()
or bdevsw() returns NULL.
Move bdevsw() and devsw() functions to kern/kern_conf.c
Bump __FreeBSD_version to 400006
This commit removes:
72 bogus makedev() calls
26 bogus SYSINIT functions
if_xe.c bogusly accessed cdevsw[], author/maintainer please fix.
I4b and vinum not changed. Patches emailed to authors. LINT
probably broken until they catch up.
Reformat and initialize correctly all "struct cdevsw".
Initialize the d_maj and d_bmaj fields.
The d_reset field was not removed, although it is never used.
I used a program to do most of this, so all the files now use the
same consistent format. Please keep it that way.
Vinum and i4b not modified, patches emailed to respective authors.
SIS/VIA/ OPTi chipset PCI bus workarounds.
These make the Bt878/879 chips stabler on certain
older and non-intel motherboards.
Use options BKTR_430_FX_MODE
or options BKTR_SIS_VIA_MODE
to enable these modes.
Also rename 849 to 849A
Change Intel GPIO mask to hopefully stop turning the Intel Camera off
Fixed tuner selection on Hauppauge card with tuner 0x0a
Replaced none tuner with no tuner for Theo de Raadt <deraadt@openbsd.org>.
Ivan Brawley <brawley@internode.com.au> added
the Australian channel frequencies.
bttv's audio mux values.
Automatically locate the EEPROM i2c address and read the subsystem_vendor_id
from EEPROM and not the PCI registers.
Add NSMBUS checks around smbus/iicbus i2c bus code
Add GPIO mask for the audio mux to each card type.
Add CARD_ZOLTRIX and CARD_KISS from mailing list searches.
Tested by: Paul Reece <paul@fastlane.net.au>,
Ivan Brawley <brawley@internode.com.au> and
Gilad Rom <rom_glsa@ein-hashofet.co.il>
