time that we really want to do this is when a bus reset causes the sequencer
to be reset and the kernel driver now handles this case.
Remove some reordering in the select2 routine that wasn't necessary.
It was an experimental fix for a race condition I fixed elsewhere, and
confused the code flow.
Don't bother looping on a parity error in the mesgout loop since we can't
see parity errors on out phases.
Clean up the mesgin_identify code. In the old days, we "snooped" for tag
messages and used this as an indicator of whether or not the target was
using tagged transactions. This forced the sequencer to ack the identify
before determining if a valid SCB matched the target meaning that an abort
message to handle this case might not be seen before the target entered a
data phase. Since we can determin the "tagged-ness" of a target by looking
it up in the array of busy targets (recently introduced), we can determine
this up front simplifying the search code as well as ensuring we can follow
the SCSI specs method for rejecting a reselection.
When an SCB is placed on the free list, set its SCB_TAG to SCB_LIST_NULL.
This makes it much easier for the kernel driver to find active SCBs on the
card during error recovery.
cruft and resulted in loading usually following a null pointer. Use
something closer to the pre-Lite2 code, including not making a copy of
the new filesystem's config info. Not making a copy also fixes a race
for loading and a memory leak for unloading.
Fixed unloading of vfs's. maxvfsconf wasn't maintained.
Look up the vfs to unload by name instead of by number. The numbers
should go away as soon as all mount utilities are converted.
- getnewvnode() and vref() were missing one simple_unlock() each.
- the Lite2 locking changes weren't merged at all in
printlockedvnodes() or sysctl_vnode(). Merging these undid
some KNF style regressions.
a race condition in how SDTR and WDTR negotiation are handled, fixes for multi-lun
non-tagged device recovery, and ensuring that the timedout scbs in the waiting queue
are cleaned up.
Fix a problem with SCB paging that caused bogus residuals to be reported.
all of the configurables and instrumentation related to
inter-process communication mechanisms. Some variables,
like mbuf statistics, are instrumented here for the first
time.
For mbuf statistics: also keep track of m_copym() and
m_pullup() failures, and provide for the user's inspection
the compiled-in values of MSIZE, MHLEN, MCLBYTES, and MINCLSIZE.
partly because the #define's for them were moved to a different
file. At least the null VOP_LOCK() no longer works, since vclean()
expects VOP_LOCK( ..., LK_DRAIN | LK_INTERLOCK, ...) to clear the
interlock. This probably only matters when simple_lock() is not
null, i.e., when there are multiple CPUs or SIMPLELOCK_DEBUG is
defined.
connect in TCP while sending urgent data. It is not clear what
purpose is served by doing this, but there's no good reason why it
shouldn't work.
Submitted by: tjevans@raleigh.ibm.com via wpaul
- avoid malloc() if the number of fds is small.
- pack the bits better so that `small' is quite large.
- don't waste time generating zero bits for null fd_set pointers or
scanning these bits.
Possibly improved select():
- free malloc()ed storage before returning. This is simpler and I
think huge select()s aren't worth optimizing since they are rare,
relative gain would be small and there would be tiny costs for all
selects().
Reviewed by: ache (first version by him too)
become impractical to distinguish versions using "real" release dates, so
might as well make it correspond to real version number (-current is
on the 3.0 branch) so at least the feature increments are guaranteed to
be linear.
Silently approved by: current list
execve() clears the P_SUGID process flag in execve() if the binary
executed does not have suid or sgid permission bits set.
This also happens when the effective uid is different from the real
uid or the effective gid is different from the real gid. Under
these circumstances, the process still has set id privileges and
the P_SUGID flag should not be cleared.
Submitted by: Tor Egge <Tor.Egge@idt.ntnu.no>
Cleanup of the disconnected list was broken in the SCB paging case
(confusion of NULLand SCB_LIST_NULL)
Implement a clean mechanism for determining that we have exited the timeout
state and test for this in ahc_done instead of all over the place.
Bring back the use of AAP (Auto Access Pause) I don't think it was the
true cause of the bus hangs people were reporting.
We want to reset the bus if we've been through an Abort action, not if
we are a recovery SCB (one implies the other, but not vice-versa).
pr_usrreqs. Collapse duplicates with udp_usrreq.c and
tcp_usrreq.c (calling the generic routines in uipc_socket2.c and
in_pcb.c). Calling sockaddr()_ or peeraddr() on a detached
socket now traps, rather than harmlessly returning an error; this
should never happen. Allow the raw IP buffer sizes to be
controlled via sysctl.
negotiation messages may be tagged, we were overrunning the old buffer.
The variable that was getting squashed is updated before the message goes
out, causing corrupted SDTR or WDTR messages. Depending on the phases
traversed before message out, this could cause the wrong offset to be
negotiated allowing data overruns to occur. The problem is easier to
detect with wide targets on the chain since the allowed offset is smaller.
Also removed the unnecessary clearing of SPIORDY during the message out
phase. We don't rely on SPIORDY any more.
non-broken chipssets whose ID is 0x84, such as the one found in the NEC
6030H.
> The code relies on the assumption that on a genuine_broken vlsi, you
> don't get 0x84 when probing slot 1 in the normal location. On the versa I
> do get 0x84 when probing slot 1 in the normal location. What you get on
> genuine_broken at the normal slot 1 location is unknown to me;
Submitted by: Chris Timmons <skynyrd@opus.cts.cwu.edu>
Successful lstat()s purged an existing entry as well as not caching the
result.
This bug was introduced in Lite1 by setting the LOCKPARENT flag for
[o]lstat() in order to support the inherit-attributes-from-parent-
directory misfeature for symlinks. LOCKPARENT was previously only set
for CREATEs and DELETEs. It is now set for LOOKUPs, but only for
[o]lstat(), so the problem wasn't very noticeable.
the old VFS_VFSCONF sysctl is enabled by default.
Initialize the vfc_vfsops field to non-NULL in sysctl_ovfs_conf()
so that the old VFS_VFSCONF sysctl actually works. The old (still
current) getvfsent.c uses this "kernel-only" field to decide which
vfs's are configured (the old implementation returned null entries
for unconfigured vfs's).
will increase the overhead of queueing a command, but some recent bug reports
make me believe that AAP isn't really working and that we are losing some
SCBs from the input queue. Hopefully this will cure that problem.
Fix some bugs in the error recovery code. Mainly these could cause us to
inadvertantly forget to untimeout an SCB that was recovered causing later
confusion.
to coredump previously since it (somewhat uniquely) is setuid and forks
without execing, and thus without passing P_SUGID the child could
coredump and possibly divulge sensitive information (such as encrypted
passwords from the passwd database).
at runtime.
etc/make.conf:
Nuked HAVE_FPU option.
lib/msun/Makefile:
Always build the i387 objects. Copy the i387 source files at build
time so that the i387 objects have different names. This is simpler
than renaming the files in the cvs repository or repeating half of
bsd.lib.mk to add explicit rules.
lib/msun/src/*.c:
Renamed all functions that have an i387-specific version by adding
`__generic_' to their names.
lib/msun/src/get_hw_float.c:
New file for getting machdep.hw_float from the kernel.
sys/i386/include/asmacros.h:
Abuse the ENTRY() macro to generate jump vectors and associated code.
This works much like PIC PLT dynamic initialization. The PIC case is
messy. The old i387 entry points are renamed. Renaming is easier
here because the names are given by macro expansions.
in the route. This allows us to remove the unconditional setting of the
pipesize in the route, which should mean that SO_SNDBUF and SO_RCVBUF
should actually work again. While we're at it:
- Convert udp_usrreq from `mondo switch statement from Hell' to new-style.
- Delete old TCP mondo switch statement from Hell, which had previously
been diked out.
is administratively downed, all routes to that interface (including the
interface route itself) which are not static will be deleted. When
it comes back up, and addresses remaining will have their interface routes
re-added. This solves the problem where, for example, an Ethernet interface
is downed by traffic continues to flow by way of ARP entries.
clusters greater than one page in length by calling contigmalloc1().
This uses a helper process `mclalloc' to do the allocation if
the system runs out at interrupt time to avoid calling contigmalloc
at high spl. It is not yet clear to me whether this works.
sb_max * MCLBYTES / (MSIZE + MCLBYTES)
used in sbreserve() to overflow, causing all socket creation attempts
to fail. Force the calculation to use u_quad_t's, which makes overflow
less likely.
"boot.config" (relative to the root directory on the 'a' partition
on the first BSD slice) if it exists. If it doesn't exist, then
the only visible changes should be that the kernel name isn't reset
to "/kernel" after looking it up fails and that the default name
is now "kernel".
The new function readfile() can be used for other things:
- reading help messages.
- reading splash screens.
- reading userconfig info.
Changed it from 4 to 16 for i386's. It can be anything for i386's,
but compiler options limit it to a power of 2, and assembler and
linker deficiencies limit it to a small power of 2 (<= 16).
We use 16 in the kernel to get smaller tables (see Makefile.i386 and
<machine/asmacros.h>). We still use the default of 4 in user mode.
Use HISTCOUNTER instead of (*kcount) in the definition of KCOUNT()
for consistency with other macros.
- *fs_init routines now take a "struct vfsconf * vfsp" pointer
as an argument.
- Use the correct type for cookies.
- Update function prototypes.
Submitted by: bde
Call vget/VOP_UNLOCK with the correct number of
arguments. Call vn_lock where appropriate.
vfs_goneall is now replaced by VOP_REVOKE.
Submitted by: bde
available in buffer when buffer was completely empty.
It now correctly reports the total buffer space available.
Reviewed by: jkh, davidg
Obtained from: Linux 1.3.20's sound driver code
being used without ever being initialized. From examining
the rest of the routine, it looks like this is a typo,
and it really should have been "1" instead of "i".
Submitted by: mpp
filed in the hardware SCB not changing during the course of a transaction.
Since the sequencer now DMAs the hardware SCB back up to the host when it
detects a residual, this is no longer the case. I added a field to the
"software" scb to mirror this information and it is now used for doing the
residual calculation.
When setting the HCNT registers, do so in ascending order.
When performing tagged queueing in non-paging mode, also check the
disconnected bit in the SCB as extra sanity during a reconection.
Make the labels in the DMA routine more sane.
When doing a DMA, if we see the DMADONE condition come true, we can
simply turn of the DMA enable bits in DFCNTRL without testing the FIFO
state as HDONE is true when DMADONE is true and this emplies the FIFO is
empty.
These changes clear up the data overrun error messages and seem to prevent
the "timed out in data-in phase" problems.
to not return without setting a return value when it
can't read a block error or detects a bad cylinder group,
since the caller is expecting a return value.
It will now panic at this point, since the thing
to do in this case would be to return a "bad block"
status to the caller, and the caller will panic
anyways when that happens.
Also updated to panic strings in this routine to read
"ffs_checkblk: ..." instead of "checkblk: ...".
changes, so don't expect to be able to run the kernel as-is (very well)
without the appropriate Lite/2 userland changes.
The system boots and can mount UFS filesystems.
Untested: ext2fs, msdosfs, NFS
Known problems: Incorrect Berkeley ID strings in some files.
Mount_std mounts will not work until the getfsent
library routine is changed.
Reviewed by: various people
Submitted by: Jeffery Hsu <hsu@freebsd.org>
ULTRAENB->FAST20
Add a missing ahc_run_done_queue if a BRKADDRINT occurs. This should never
happen (haven't heard of one happening), but it was still a bug.
Brought the ordered tag sending code up into the tag code to be clearer.
If we decide we should send an ordered tag, only do so for the target that
timed out instead of all targets.
Initialize the STAILQ in ahc_serach__qinfifo. This was causing a panic
during some recovery operations.
Remove the unused varable maxtarget.
free.
When we clear SCSIRATE, also clear the FAST20 bit in SXFRCTL0. This also
allowed me to clean up some of the ULTRA code.
ULTRAENB->FAST20 to follow the convention in the Adaptec data books.
Fix the data-overrun code to set both stcnt and hcnt otherwise, the transfer
will just hang until we get a timeout.
Add implicit support for the NOOP message. I've never heard of the driver
issueing a reject for one, but its silly to reject NOOP and who knows how a
device might react.
In the dma routine, check SDONE before cleaing SDMAEN. The data books mention
SDONE possibly being cleared when SDMAEN is reset. Clients of dma now need
to check if SINDEX is cleared to know if a phasemis occured.
Fix some comments to be correct.
from last time. Some people have pointed out that there were some odd
side-effects in the changes I made. Two things are different:
- sc_print_addr() will print 'foodev0:' (i.e. sd0:, st0:, cd0:, etc...)
if the device name is known. If it's not known, it'll use a longer
notation. This shortens error messages back to a sane length.
- Added a small function called sc_print_init() to set the sc_printing
flag so that sc_print_addr() will know that we want it to print a
linefeed. Used this in scsi_device_attach() to restore proper carriage
return printing behavior which I broke.
Remaining bogons: the NCR SCSI driver prints out information while the
device-specific attach routine is running with its own linefeeds. This
breaks up the individual messages emitted by the subdriver modules and
causes at least one message to appear on a line by itself without a
device spec prefix. I'm not sure of the correct way to fix this, and
I don't have any NCR SCSI hardware to test with anyway.
There's probably more, but I gather that a rewrite of the SCSI subsystem
is pending anyway, so I'll leave the rest to Those Who Know More About
This Than I (tm).
complained so it cannot be entirely bad :-)
I include the email that probably explains it for people who already know:
> >Compiling with -O3 inlines functions. However the function that is being
> >inlined in makeinfo.c (add_word_args()) is a vararg function and must not be
> >inlined.
> >
> >The code in question is K&R style, and AFIK, there is no way for the compiler
> >to determine that the function uses vararg. Either change the code to use
> >prototypes, or use stdarg, or add a directive to prevent inlining.
>
> Not declaring a varargs function as varargs before it is used gives
> undefined behaviour.
>
> However, in practice the bug is probably in FreeBSD's <varargs.h>, which
> doesn't use gcc's __builtin_next_arg(). gcc should notice that it is
> used and not inline functions that have it. <stdarg.h.> uses it, but I
> think there's another gcc builtin that it should be using.
Patch attached. The ellipsis causes gcc to flag this as a varargs function,
and the name "__builtin_va_alist" is special cased in gcc to hide the last
argument in the arglist.
Reviewed by: bde & phk
Submitted by: jlemon@americantv.com (Jonathan Lemon)
The PS/2 mouse device responds to a reset command with a sequence of
ACK(fa), RESULT(aa) and ID(00). Most PS/2 mice immediately returns
ACK, but spend sometime before sending RESULT. The Armada takes time
before ACK; extra delay is necessary before the call to read ACK.
The problem was reported in comp.unix.bsd.freebsd.misc and the patch
was tested by the reporter. No PR was filed, by the way.
read-mode access to CD-ROM media in the worm(4) driver. No whistles
and bells yet, like all the CDIO* commands, but at least a start.
In order to do this, i had to slightly rearrange the semantics of an
open(2) on the worm driver: now, opening it with O_NONBLOCK set means
no actual IO operations will be intended but only ioctls are to be
processed. This mode is used by wormcontrol(8) to prepare a track
and/or session.
I have only been able to test this on a 2.2-GAMMA system by now, and
only the !DEVFS part is tested yet. Also, i have only done a dummy
burn so far, but wouldn't expect many surprises else. Report bugs to
me ASAP, if there's reasonable demand and i hear no objections, i
might consider merging it into the 2.2 branch as well.
affect programs that sit on top of divert(4) sockets. The
multicast routing code already unconditionally zeros the sum
before recalculating.
Any code that unconditionaly sums a packet without first zeroing
the sum (assuming that it's already zero'd) will break. No such
code seems to exist.
This parameter is intended to allow new kernels to work with old LKM binaries,
provided the revision ID is incremented whenever the PCI LKM interface is
changed. The revision ID does not at all protect against changes in data
structures accesses by the driver.
Disabled the DMA byte counters - I had it this way originally and this is
the recommended setting.
Set crscdt to CRS only (0) since this is what it should be for an MII PHY.
Also fixed some comments.
to search the QINFIFO to remove any possible command that is waiting
otherwise our abort request may not be held up still waiting for the
first command to complete.
I/O port address of most devices is not contiguos, a return value of
probe routine is not so useful for detecting conflict. The return
value was too big, and kernel sometimes detected conflict even though
two devices are not conflict in I/O address between them.
Suggested by: Chiharu Shibata <chi@rd.njk.co.jp>
Fix a few panics during error recovery:
1) Stupid mistake in the "no SCB match handler" where I was using the wrong
variable (busy_scbid instead of scb_index).
2) Unbusy the target of an abort request if the command we are trying to
abort is an untagged transaction. If we don't, we get a fatal NO_MATCH_BUSY
condition which "should never happen".
3) When an abort completes, turn off ahc->in_timeout or else the next timeout
will hit the protective "scb timesout again" panic.
4) Fix a typo that caused the requeued "abort" SCB to have its TAG_ENB and
disconnect bits to be cleared (missing ~) so that devices would complain
about overlapped commands.
Be sure to turn off the unexpected busfree interrupt after we do a bus
reset since we are expecting the bus to go free in that case.
Return XS_TIMEOUT instead of XS_DRIVERSTUFFUP in certain scenarios. XS_TIMEOUT
allows for retries, XS_DRIVERSTUFFUP does not.
Allow commands with SDTR and WDTR negotiation to be tagged. The SCSI II spec
says that you probably should not do this for fear of hitting bogus devices.
The driver did this in the past for almost two years without any problem,
and not doing it causes problems during error recovery to a tag capable device
as the number of openings is higher than two and we'll start sending it
tagged commands causing "overlapped commands attempted" type errors. The
real fix needs to happen in the generic SCSI layer which can limit the
number and type of transactions to a device during error recovery efficiently.
Give ourselves at least 100ms to perform a request sense instead of relying
on the original timeout to be long enough to complete this new command as
well as the one that generated the condition.
Removed some redundant code.
host DMAs. The additional test to ensure that the DMA has stopped is also
unnecessary since we've already waited for the DMA to complete.
Update my copyright for the new year.
(since T_DIRECT just incidentally happens to be equal 0). This causes
more harm than it would do good. Instead , get it at the uk driver.
Reviewed by: obrien@NUXI.com (David O'Brien)
set it in the first place, independent of whether sin->sin_port
is set.
The result is that diverted packets that are being forwarded
will be diverted once and only once on the way in (ip_input())
and again, once and only once on the way out (ip_output()) -
twice in total. ICMP packets that don't contain a port will
now also be diverted.
with <= 100 usec between each character arrival time. This didn't happen
until rev.1.75 of clock.c because DELAY(100) used to delay for closer to
80 usec than 100 usec, and the minimum time between character arrivals is
87.8 usec at the maximum supported speed of 115200 bps 8N1.
Clear DCD timestamp flag on close (the input timestamp flag is already
cleared).
key "print scrn".
It used to stop at the first non-open vty, now it skips the non-open
ones and thereby enable one to cycle around all open vty by pressing
"print scrn".
I have code to calibrate the overhead fairly accurately, but there
is little point in using it since it is most accurate on machines
where an estimate of 0 works well. On slow machines, the accuracy
of DELAY() has a large variance since it is limited by the resolution
of getit() even if the initial delay is calibrated perfectly.
Use fixed point and long longs to speed up scaling in DELAY().
The old method slowed down a lot when the frequency became variable.
Assume the default frequency for short delays so that the fixed
point calculation can be exact.
Fast scaling is only important for small delays. Scaling is done
after looking at the counter and outside the loop, so it doesn't
decrease accuracy or resolution provided it completes before the
delay is up. The comment in the code is still confused about this.
- don't uselessly initialize the fifo "DMA" bit at attach time.
- initialize the fifo "DMA" bit at open time. Without this, the device
interrupts for every character received, reducing input performance
to that of an 8250.
- don't uselessly initialize the fifo trigger level to 8 (scaled to
256) at attach time.
- don't scale the fifo trigger level to 512 bytes. The driver's pseudo-
dma buffer has size 256, so it can't handle bursts of size 512 or 256.
It should be able to handle the second lowest ftl (2 scaled to 64).
- don't reset the fifos in siostop(). Reset triggers a hardware bug
involving wedging of the output interrupt bit This workaround
unfortunately requires ESP support to be configured.
slices in sd_open() after a media change when the previous sd_open()
discards the previous slices and then fails. sd_open() just handles
media changes poorly and fails too often.
If we can, use timeouts instead of DELAYs when dealing with a bus reset.
This prevents us from holding up the whole machine for a noticible amount
of time (especially for a real time app).
Make a pass over the timeout/error handling code. Aborts are more
reliable. We actually handle parity errors correctly now instead of
locking up the bus. Added code to properly clean up disconnected SCBs
down on the card during error handling. Improved robustness in several
areas.
If we are using defaults, but are an Ultra card, negotiate at 20MHz instead
of 10.
Don't attempt to handle any commands for 100ms after a reset has occured.
This is the minimum time before a target will respond to selection. Also
disable the busfree interrupt before doing a bus reset. This prevents the
driver from getting confused by an "unexpected busfree".
Expand the boundaries of a pause disabled region to close of possible race
condition.
Revert a portion of the DMA code to fix false overruns.
Add a missing "add_scb_to_free_list" so we don't leak SCBs.
The limit is now only used by init, so it may as well be "infinite".
Don't use RLIM_INFINITY, since setrlimit() doesn't allow setting
that value. Use maxfiles instead of RLIM_INFINITY for the hard
limit for the same reason.
Similarly for the maxprocesses limits (use the "infinite" value of
maxproc instead if MAXUPRC and RLIM_INFINITY).
NOFILES, MAXUPRC, CHILD_MAX and OPEN_MAX are no longer used in
/usr/src and should go away. Their values are almost guaranteed to
be wrong now that login.conf exists, so anything that uses the values
is broken. Unfortunately, there are probably a lot of ports that
depend on them being defined.
The global limits maxfilesperproc and maxprocperuid should go away
too.
Put obsolete GATEWAY option back in opt_defunct.h. It's the only
significant option that has gone away since 2.1.6, so warning about
it might be useful.
SEM* and SHM*. These are already supported in the options files. I
mostly used the default value plus 1. This ensures that the LINT kernel
depends on the options headers.
("Hey! Who made _you_ the keeper of all things BSDish?!") but this has
bugged me for a long time, and now that I finally have the chance
to hack on it (and test the results), I'll take my chances. I can also
point to other BSD implementations for precedents if you put my back to
the wall.
The only thing that's changed is how the messages are formatted. Now,
instead of having this:
aha0 at 0x330-0x333 irq 11 drq 5 on isa
(aha0:3:0): "HP C1553A 9503" type 1 removable SCSI 2
st0(aha0:3:0): Sequential-Access density code 0x24, variable blocks, write-enabled
(aha0:3:1): "HP C1553A 9503" type 8 removable SCSI 2
ch0(aha0:3:1): Medium-Changer 6 slot(s) 1 drive(s) 0 arm(s) 0 i/e-slot(s)
We have this:
aha0 at 0x330-0x333 irq 11 drq 5 on isa
scbus0 at aha0 bus 0
st0 at scbus0 target 3 lun 0
st0: <HP C1553A 9503> type 1 removable SCSI 2
st0: Sequential-Access density code 0x24, variable blocks, write-enabled
ch0 at scbus0 target 3 lun 1
ch0: <HP C1553A 9503> type 8 removable SCSI 2
ch0: Medium-Changer 6 slot(s) 1 drive(s) 0 arm(s) 0 i/e-slot(s)
Which is (to me anyway) is a lot more pleasant to look at. (Call me
crazy -- g'head: you know you wanna -- but the previous messages remind
me of Linux. Ever see the output from the linux device probes? It's a mess
of copyright notices, version numbers/dates, author e-mail addresses and
other crap. Let's not go there, okay? Bleh.)
Notice that devices are now specified in terms of the scsi bus they
live on rather than the adapter. This better reflects the contents
of the kernel config file (if you use wired-down device specifications
anyway) and removes some ambiguity that may arise if you have a multi-
channel adapter with more than one bus.
Also, sc_print_addr() now generates messages like this:
st0 at scbus0 target 3 lun 0: NOT READY asc:3a,0 Medium not present
instead of this:
st0(aha0:3:0): NOT READY asc:3a,0 Medium not present
I also added a quirk entry for the HP Superstore 12000e 6 tape DAT
autoloader, which needs SC_MORE_LUS in order for the changer device
to be properly probed and attached. (I'm working on a chcontrol utility
to manipulate the changer on this drive which should hopefully be general
enough to work with other changers too. If you want the prototype I have
now, it's at ftp://skynet.ctr.columbia.edu/pub/freebsd/changer.c.)
Remaining bugs:
- The 'foodev0: yadda yadda yadda' bits should probably be printed entirely
by the device-specific subdriver attach code instead of half by the
scsi_device_attach() routine and half by the device specific attach
routine like it is now.
- The wired-down device specifications in the kernel config file should
be used to control bus/device probing to some extent rather than just
for choosing names for devices we find. If the config says there's a
device at scbus0 target 0 lun 0 called sd0, we should look there and
check for a device that can be managed by the sd driver. If we don't
find one, we should probably complain that there's no device there or
that there is a device but of the wrong type. Once all the devices from
the wired down list have been probed, the code can then autodetect and
autoattach any devices that remain unassigned.
- Apparently some tape changers (hi Ulf!) return 'not ready/medium not
present' when the magazine is loaded but a tape has not been put in the
drive yet. This causes an open(/dev/ch0) to fail and prevents you from
using the changer.c utility to load the first tape into the drive. My
HP changer does not behave this way. The workaround is to manually load
a tape into the drive before attempting to use the changer program, but
you can get in trouble if you accidentally eject a tape without loading
a new one and you're at a remote location: you won't be able to load
any tapes anymore. I'm not sure what the correct software solution is
for this but ideally there should be one.
- I should not be doing this: I'm the NIS guru, not the SCSI guru.
(This is not my beautiful code. How did I get here? My god: what
have I done?)
Add auto-termination support as well as support for setting the high byte
termination. Booting with '-v' will display the settings that the driver
chose. If you stick narrow devices onto the external wide port, you had
better make sure that your converter cable terminates the bus, you have a
wide device on there that terminates the bus, or you manually set the
termination properly in SCSI-Select instead of using "Automatic". The
code will get the setting right regardless if you *don't* have internal
wide devices in this type of configuration. Unfortunatly this is a limitation
of the design of the Adaptec cards.
Style nit. Backslashes in macro weren't aligned.
aic7xxx.c:
Preserve the value of STPWEN in SXFRCTL1 during initialization. STPWEN
controls low byte termination and is setup by the PCI probe front end.
SDONE, not HDONE.
In the data phase dma handler, mask off just the enable bits instead of
clearing the whole register. Clearing the direction bit could be bad.
Also don't stop a DMA until MREQPEND goes false. Doing this may cause
an ABORT on the PCI bus although I have yet to see this happen.
Add definitions for MREQPEND and the BRDCTL register. The BRDCTL register
is used to handle high byte termination and automatic termination testing.
Disabling npx0 works right now.
Don't reference `npxdriver' if npx0 is not configured. Not configuring
npx0 doesn't quite work yet.
Don't clear potential non-npx pcb flags in setregs().
should be nearly impossible to overflow the QOUTFIFO (worst case 9 command
have to complete with at least 6 of them requiring paging on an aic7850),
so don't take the additional PIO hit to guard against this condition. If we
don't see our interrupt in time, the system has bigger problems elsewhere.
If this ever does happen, the timeout handler will notice and retry the
command.
Remove the ABORT_TAG sequencer interrupt handler. This condition can't happen
with the new SCB paging scheme.
Fix a few bugs noticed by Dan Eischen <deischen@iworks.InterWorks.org>
that could prevent ULTRA from being negotiated to drives above ID 7 and
also could allow an SCB to be passed to ahc_done twice during error recovery.
Fix a bug notice by Rory Bolt <rory@atBackup.com>. It turns out that a
sequencer reset will actually start the sequencer running regardless of the
state of the pause bit. This could lead to strange problems with loading
the sequencer.
Only enable reselections once the channel and SCSIRATE have been cleared.
Add a pause block around the test busy code in the non-tagged case to simplify
error recovery in the corner case of aborting an SCB that just got started.
Simplify reselection processing by removing the call to initialize_scsiid.
Clear the scsiseq re/select control bits and setup for catching bogus
busfrees earlier in the re/select process.
Improve the automatic PIO code. It turns out that SPIORDY is not a reliable
hardware condition bit, so use REQINIT intstead. Don't rely on PHASEMIS
either since it can take too long to come true. Use a brute force comparison
instead.
Remove some unnecessary overhead in the command complete processing. It
should be nearly impossible to overflow the QOUTFIFO (worst case 9 command
have to complete with at least 6 of them requiring paging on an aic7850),
so don't take the additional PIO hit to guard against this condition. If we
don't see our interrupt in time, the system has bigger problems elsewhere.
If this ever does happen, the timeout handler will notice and retry the
command.
not lazy-fault page table pages. Update the copyout support to take
that into account. This should fix some segfault problems on such
machines.
After a short test period, we'll move this into 2.2.
Submitted by: Stephen McKay <syssgm@devetir.qld.gov.au>
an X seesion. Really stupid error of me, and I've been looking at
this code SO many times. Thanks to Kazutaka YOKOTA for seeing this..
Submitted by: Kazutaka YOKOTA
the page to be unbusy, and it caused some algorithmic problems
as a result. There were some other problems with it also, so
this is a general cleanup of the code.
Submitted by: Douglas Crosher <dtc@scrooge.ee.swin.oz.au> and myself.
one in draw_mouse causes spontanious hangs on my p5-100 when I
move the mouse excessively. Forgot that on the last commit, so
using the mouse or destructive cursor would produce large amounts
of flicker..
now dead sys/pci/if_pdq.c which has been committed about by the same
time i made my tests with Matt's code.
LINT should compile now again.
Well, that's a clear case where ``CVS writer locks'' would certainly
(not) have helped. :-]
