Instead introduce the [M] prefix to existing keywords. e.g.
MSTD is the MP SAFE version of STD. This is prepatory for a
massive Giant lock pushdown. The old MPSAFE keyword made
syscalls.master too messy.
Begin comments MP-Safe procedures with the comment:
/*
* MPSAFE
*/
This comments means that the procedure may be called without
Giant held (The procedure itself may still need to obtain
Giant temporarily to do its thing).
sv_prepsyscall() is now MP SAFE and assumed to be MP SAFE
sv_transtrap() is now MP SAFE and assumed to be MP SAFE
ktrsyscall() and ktrsysret() are now MP SAFE (Giant Pushdown)
trapsignal() is now MP SAFE (Giant Pushdown)
Places which used to do the if (mtx_owned(&Giant)) mtx_unlock(&Giant)
test in syscall[2]() in */*/trap.c now do not. Instead they
explicitly unlock Giant if they previously obtained it, and then
assert that it is no longer held to catch broken system calls.
Rebuild syscall tables.
Clear residual counts after a successful samount (the user doesn't
care that we got an N-kbyte residual on our test read).
Change a lot of error handling code.
1. If we end up in saerror, check more carefully about the kind of
error. If it is a CAM_SCSI_STATUS_ERROR and it is a read/write
command, we'll be handling this in saerror. If it isn't a read/write
command, check to see whether this is just an EOM/EOP check condition-
if it is, just set residual and return normally. A residual and
then a NO SENSE check condiftion with the ASC of 0 and ASCQ of
between 1 and 4 are normal 'signifying' events, not errors per se,
and we shouldn't give the command to cam_periph_error to do something
relatively unpredictable with.
2. If we get a Bus Reset, had a BDR sent, or get the cam status of
CAM_REQUEUE_REQ, check the retry count on the command. The default
error handler, cam_periph_error, doesn't honor retry count in these
cases. This may change in the future, but for now, make sure we
set EIO and return without calling cam_periph_error if the retry
count for the command with an error is zero.
3. Clean up the pending error case goop and handle cases more
sensibly.
The rules are:
If command was a Write:
If we got a SSD_KEY_VOLUME_OVERFLOW, the resid is
propagated and we set ENOSPC as the error.
Else if we got an EOM condition- just mark EOM pending.
And set a residual of zero. For the longest time I was just
propagating residual from the sense data- but my tape
comparison tests were always failing because all drives I
tested with actually *do* write the data anyway- the EOM
(early warning) condition occurred *prior* to all of the
data going out to media- that is, it was still buffered by
the drive. This case is described in SCSI-2, 10.2.14,
paragraph #d for the meaning of 'information field'. A
better fix for this would be to issue a WFM command of zero
to cause the drive to flush any buffered data, but this
would require a fairly extensive rewrite.
Else if the command was a READ:
If we got a SSD_KEY_BLANK_CHECK-
If we have a One Filemark EOT model- mark EOM as pending,
otherwise set EIO as the erorr.
Else if we found a Filemark-
If we're in Fixed Block mode- mark EOF pending.
If we had an ILI (Incorrect Length Indicator)-
If the residual is less than zero, whine about tape record
being too big for user's buffer, otherwise if we were in
Fixed Block mode, mark EIO as pending.
All 'pending' conditions mean that the command in question completes
without error indication. It had succeeded, but a signifying event
occurred during its execution which will apply to the *next* command
that would be exexcuted. Except for the one EOM case above, we always
propagate residual.
Now, way back in sastart- if we notice any of the PENDING bits set,
we don't run the command we've just pulled off the wait queue. Instead,
we then figure out it's disposition based upon a previous command's
association with a signifying event.
If SA_FLAG_EOM_PENDING is set, we don't set an error. We just complete
the command with residual set to the request count (not data moved,
but no error). We continue on.
If SA_FLAG_EOF_PENDING- if we have this, it's only because we're in
Fixed Block mode- in which case we traverse all waiting buffers (which
we can get in fixed block mode because physio has split things up) and
mark them all as no error, but no data moved and complete them.
If SA_FLAG_EIO_PENDING, just mark the buffer with an EIO error
and complete it.
Then we clear all of the pending state bits- we're done.
MFC after: 4 weeks
- Decrease reseeding interval from every 64 to every 16384 runs
to reduce entropy usage.
- Add time based reseeding. (Every 5 minutes.)
- Throw away the first 256 words of output as suggested in
"Weaknesses in the Key Scheduling Algorithm of RC4."
Reviewed by: Mark Murray
MFC After: jkh says ok
for the device now (we should really just be parsing a passed-in resource
buffer).
Wrap long lines so this is (more) readable.
Support Address16 and Address32 resources, in the CONSUMER case.
Support DRQs so that we can handle ISA devices.
Support ExtendedIrqs (we ignore most of their attributes)
Add a placeholder device for system memory and system resources. This
takes the place of the nexus placeholder, which only attaches to ISA.
the ACPI module if the system apperars to be ACPI compliant.
This is an initial cut; the load should really be done by Forth support
code, and we should check both the BIOS build date and a blacklist.
o Unify <machine/endian.h>'s across all architectures.
o Make bswapXX() functions use a different spelling of u_int16_t and
friends to reduce namespace pollution. The bswapXX() functions
don't actually exist, but we'll probably import these at some
point. Atleast one driver (if_de) depends on bswapXX() for big
endian cases.
o Deprecate byteorder(3) prototypes from <sys/types.h>, these are
now prototyped indirectly in <arpa/inet.h>.
o Deprecate in_addr_t and in_port_t typedefs in <sys/types.h>, these
are now typedef'd in <arpa/inet.h>.
o Change byteorder(3) prototypes to use standards compliant uint32_t
(spelled __uint32_t to reduce namespace pollution).
o Document new preferred headers and standards compliance.
Discussed with: bde
PR: 29946
Reviewed by: bmilekic
new data is acknowledged, reset the dupacks to 0.
The problem was spotted when a connection had its send buffer full
because the congestion window was only 1 MSS and was not being incremented
because dupacks was not reset to 0.
Obtained from: Yahoo!
1. Correctly handle commands initiated by the adapter. These commands
are defered to a kthread responsible for their processing, then are
properly returned to the controller.
2. Add/remove disk devices when notified by the card that a container was
created/deleted/offline.
3. Implement crashdump functionality.
4. Support all ioctls needed for the management CLI to work. The linux
version of this app can be found at the Dell or HP website. A native
version will be forthcoming.
MFC-after: 4.4-RELEASE
Second, the TI 1130 need to have the PCI_INTR set, not cleared.
This gets Soren's machine working with NEWCARD again.
# The whole initialization is a mess and needs to be organized ala OLDCARD.
the cwd is looked up inside the kernel. The native getcwd() in libc
handles this in userland if __getcwd() fails.
Obtained from: NetBSD via OpenBSD
Tested by: Chris Casey <chriss@phys.ksu.edu>, Markus Holmberg <markush@acc.umu.se>
Reviewed by: Darrell Anderson <anderson@cs.duke.edu>
PR: kern/24315
pollution for non-POSIX.1e macros.
o Introduce CAP_UNITE(), CAP_NONZERO().
o Disable aspects of CAP_SETPCAP, which is Linux-specific (in particular,
remove it from CAP_ALL_ON).
o Improve commenting.
Submitted by: tmm
Obtained from: TrustedBSD Project
KINFO_BSDI_SYSINFO. This supposedly fixes Netscape 3.0.4 (bsdi binary)
on -current. (and is also applicable to RELENG_4)
PR: 25476
Submitted by: Philipp Mergenthaler <un1i@rz.uni-karlsruhe.de>
multiple times, others do. The last strategy, which was to assume
that already routed interrupts were good and just return them doesn't
work for some laptops. So, instead, we have a new strategy: we notice
that we have an interrupt that's already routed. We go ahead and try
to route it, none the less. We will assume that it is correctly
routed, even if the route fails. We still assume that other failures
in the bios32 call are because the interrupt is NOT routed.
Note: some laptops do not support the bios32 interface to PCI BIOS and
we need to call it via the INT 2A interface. That is another windmill
to till at later.
Also correct a minor typo and minor whitespace nits.
Strong MFC candidate.
dual function card. It needs pretty much the same flags as the 656C,
except that it seems to need both the INVERT_MII_PWR and INVERT_LED_PWR
flags set. Tested with cardbus in -current as of today.
Also added support for the 3c656, which looks to be the same as
the 656B, except it doesn't need the EEPROM_8BIT flag. I think. This
one is untested, but the added support should not break any of the
other cards.
to the application as a RST would, this way we're compatible with the most
applications.
MFC candidate.
Submitted by: Scott Renfro <scott@renfro.org>
Reviewed by: Mike Silbersack <silby@silby.com>
I already deleted it some time ago). This should fix problem people have with
unsefined reference to `MD_PRELOAD_COMPRESSED'.
Submitted by: Manfred Antar <null@pozo.com>
the chip can cause a PCI protocol violation in under certain scenarios.
The workaround is to rewrite the EEPROM to disable Dynamic Standby Mode.
Once the EEPROM is rewritten, the system needs to be rebooted in order
to pick up the new settings.
This has been tested on several ICH2/ICH2-M systems, found in 815E based
boards, and usually identified by the presence of the 82562 ET/EM PHY.
Thanks to: Mike Tansca, Paul Saab for samples of the problematic boards.
if all disks were detached sucessfully;
- use consistent style for return statements and fix several others style
inconsistencies.
Reviewed by: ru
Approved by: phk
file. ffs will discard any pending dirty pages when it is closed,
so we may as well not waste time trying to clean them. This doesn't
stop other things from writing it out, eg: pageout, fsync(2) etc.
config space that I'm aware of) work. I'm committing this from such
a machine.
Remove warning about I/O based bridges. Warn users that the PCI routing
of interrupts still doesn't work for these cards.
o For TI PCI-1130, you need to set bit 5 of register 91 if you want
ANY pci interrupts. Then set bits 3 and/or 4 as appropriate. This
will fix those people with 1030, 1130 and 1131 in their machines
trying to do PCI interrupts.
o Fix case where we were trying to automatically fail back to ISA
interrupt routing. We were dereferencing a NULL pointer. This
was true of ANY chipset.
o The bus_setup_intr method needs to be pcic_setup_intr so that "FAST"
interrupts fail on PCI case (modems act flakey if we don't force
them to fall back to normal interrupts). Also needed so that the
proper ISA IRQ can be set in the ExCA register. This fixes the
people whose ISA routing was failing[*].
o When we find a generic yenta/pccard bridge, go ahead and print its
vendor ID in boot verbose.
Machine with theses symptoms and a serial console by: jedgar
[*] Looks like my pc98 machine has some interrupt source on IRQ 15
that gave about 30 interrupts per second, which masked this problem on
my PC-9821Nr15.
Briefly, the significant changes include:
* Way better resource management in pccbb, pccard and cardbus.
* pccard hot-removal now appears to work.
* support pre-fetchable memory in cardbus.
* update cardbus to support new pci bus interface functions.
* Fix CIS reading to no longer use rman_get_virtual().
What's not there, but in the works:
* pccard needs to do interrupt properly and not read the ISR on single
function cards.
* real resource management for pccard
* a complete implementation of CIS parsing
* need to look into how to correctly use mutex in pccbb
This is the first part of a two-part update to NEWCARD. Changes in this
commit are non-functional, and includes the following:
* indentation and other changes to meet style(9).
* other minor style consistancy changes
* addition of comments
* renaming of device_t variables to be consistant across all of NEWCARD.
(note that not all style violations are fixed in this commit -- those that
aren't will be clobbered by the next commit.)
This is the first part of a two-part update to NEWCARD. Changes in this
commit are non-functional, and includes the following:
* indentation and other changes to meet style(9).
* other minor style consistancy changes
* addition of comments
* renaming of device_t variables to be consistant across all of NEWCARD.
(note that not all style violations are fixed in this commit -- those that
aren't will be clobbered by the next commit.)
never attempt to hash directories once they are deleted. This fixes
a problem where operations on a deleted directory could trigger
dirhash sanity panics.
about rules and dynamic rules. it later fills this buffer with these
rules.
it also takes the opporunity to compare the expiration of the dynamic
rules with the current time and either marks them for deletion or simply
charges the countdown.
unfortunatly it does this all (the sizing, the buffer copying, and the
expiration GC) with no spl protection whatsoever. it was possible for
the dynamic rule(s) to be ripped out from under the request before it
had completed, resulting in corrupt memory dereferencing.
Reviewed by: ps
MFC before: 4.4-RELEASE, hopefully.
to supply the number of bytes to be bcopy()'d to move an entry. If
d_ino == 0 however, DIRSIZ() is not guaranteed to return a sensible
length, so ufs_direnter could end up corrupting a directory during
compaction. In practice I believe this can only happen after fsck_ffs
has fixed a previously-corrupted directory.
We now deal with any mid-block unused entries specially to avoid
using DIRSIZ() or bcopy() on such entries. We also ensure that the
variables 'dsize' and 'spacefree' contain meaningful values at all
times. Add a few comments to describe better this intricate piece
of code.
The special handling of mid-block unused entries makes the dirhash-
specific bugfix in the previous revision (1.53) now uncecessary,
so this change removes it.
Reviewed by: mckusick
interrupt for the CSC interrupt, then we revert to ISA. If we didn't
have an interrupt set up with hw.pcic.irq, then do polling.
Also, don't complain about ignoring function 1 for any devices except
pcic devices. This would normally only show up if someone set
hw.pcic.ignore_function_1=1.
MFC: as soon as I can test it on some troublesome laptops.
on and off since John Dyson left his work-in-progress.
It is off by default for now. sysctl vm.zeroidle_enable=1 to turn it on.
There are some hacks here to deal with the present lack of preemption - we
yield after doing a small number of pages since we wont preempt otherwise.
This is basically Matt's algorithm [with hysteresis] with an idle process
to call it in a similar way it used to be called from the idle loop.
I cleaned up the includes a fair bit here too.
level implementation stuff out of machine/globaldata.h to avoid exposing
UPAGES to lots more places. The end result is that we can double
the kernel stack size with 'options UPAGES=4' etc.
This is mainly being done for the benefit of a MFC to RELENG_4 at some
point. -current doesn't really need this so much since each interrupt
runs on its own kstack.
I'm at it also add a comment in mtx_validate() explaining the purpose
of the last change.
Basically, this fixes booting kernels compiled with MUTEX_DEBUG. What used
to happen is before we setidt from init386() [still using BTX idt], we
called mtx_init() on several mutex locks, notably Giant and some others.
This is a problem for MUTEX_DEBUG because it enables mtx_validate() which
calls kernacc(), some of which in turn requires Giant.
Fix by calling kernacc() from mtx_validate() only if (!cold).
explain the subtle side effects that are going to happen and why we go
ahead and ack the interrupt source. This stuff is tricky to get
right.
Also, emperical tests have shown that doing a shutdown in attach to be
ineffectual, so remove it from there. Analysis of the code paths
shows that nearly identical writes to these registers happen in later
parts of the code. The hanging problem on thinkpads when we change
the interrupt routing type is something else.
shutdown and also before we get going with the device initialization.
This may fix the hangs some people are seeing on warmboot. It appears
that some machines will reset the cardbus bridge on boot, while others
don't. So we turn off the card, and ack the interrupts (which likely
is a nop in the shutdown case since we're still fielding interrupts).
This should turn off the interrupts.
Since I don't have hardware that hangs on reboot, I'm committing this
without testing that aspect of the patch (it causes no harm on my
Dell).
initialization structure. Warn the user for those chipsets that
aren't yet customized that they might not work. Second, try to power
off the slot on attach and ack the interrupts. I don't know, but this
might solve the hangs that people will see on Thinkpads if they set
hw.pcic.init_routing=1.
go into the PLX 9052's interrupt control register and turn on the magic
interrupt enable bit.
Partial thanks are due to OpenBSD for pointing out that the chip is a
PLX 9052 and pointing me to the datasheet PDF.
then one can restart from a panic by resetting the panicstr variable to
NULL. This commit conditionalizes the previously committed functionality
on this variable. It also removes the __dead2 attribute from the panic()
function so that when one continues from a panic() the behavior will
be predictable.
