files which Compaq open-sourced (with a BSD license).
This commit adds support for proper PCI interrupt mapping and much
better support for swizzling between "standard" isa IRQs and the stdio
irqs used by the t2. This also adds enabling/disabling/eoi support
for AlphaServer 2100A machines. The 2100A (or lynx) interrupt
hardware is is very different (and much nicer) than the 2100.
Previously, only AS2100 and AS2000 machines worked.
This commits also lays the groundwork for supporting ExtIO modules.
These modules are essentially a second hose. This work is left
unfinished pending testing on real hardware. Wilko tells me that
ExtIO modules are quite rare, and may not actually exist in the wild.
Obtained from: Tru64
Tested by: wilko
Backout the previous delta (rev 1.4), it didn't make any difference.
If the requested handle is NULL then don't add it to the list of
objects, to be found by handle.
The problem is that when asking for a NULL handle you are implying
you want a new object. Because objects with NULL handles were
being added to the list, any further requests for phys backed
objects with NULL handles would return a reference to the initial
NULL handle object after finding it on the list.
Basically one couldn't have more than one phys backed object without
a handle in the entire system without this fix. If you did more
than one shared memory allocation using the phys pager it would
give you your initial allocation again.
Deal with excessive dirty buffers when msync() syncs non-contiguous
dirty buffers by checking for the case in UFS *before* checking for
clusterability.
__P() prototypes when an ansi-style static inline is a prototype already.
Since vnode_if.[ch] are generated on the fly, there are no CVS diffs to
mess up.
SMP problem. Compaq, in their infinite wisdom, forgot to put the IO apic
intpin #0 connection to the 8259 PIC into the mptable. This hack is to
look and see if intpin #0 has *no* table entry and adds a fake ExtInt
entry for the remap routines to use. isa/clock.c will still test the
interrupts. This entry is only ever used on an already broken system.
where fork1() could put the process on the run queue where it could be
snatched up by another CPU before kthread_create() had set the proper
fork handler. Instead, we put the new kthread on the runqueue after its
fork handler has been sent.
Noticed by: jake
Looked over by: peter
mutex operations. In the future they may call functions that verify
correct locking order between processes in the INVARIANTS case.
- Lock the process in PHOLD() and PREL().
mpapic.c. This gives us the benefit of C type checking. These functions
are not called in any critical paths and are not used by the interrupt
routines.
place the LOCKing macros within the areas within if_wxvar.h that
is set aside for them. Put any platform specific data also in those
areas.
For ease of maintenance purposes, merge in the OpenBSD version codebase here.
- Whitespace fixes.
- Comment fixes (mostly capitalization and trailing periods).
- Reorderings to put variables all in the same place, function prototypes
sorted alphabetically, etc.
2. Removed unused and #ifdef'd out members from struct ithd.
3. Changed ESTCPULIM() to use an explicit (PRIO_MAX - PRIO_MIN) rather than
PRIO_TOTAL.
4. Remove <sys/lock.h> #include and resort #include's.
Submitted by: bde (1, 3, 4)
a tunstart function, which is called when a packet is sucessfully
placed on the queue. This allows us to properly do output byte accounting
within the handoff routine.
Add a test against isp->isp_osinfo.islocked prior to trying to see
whether --isp->isp_osinfo.islocked is zero to cause us to unlock
(non-SMPLOCK case).
in the future:
o Remove pcic_softc from pcic_handle and replace it with a void *
o Reduce dependence on accessing softc via a pcic_handle
Minor cleanups:
o Define a macro to count the size of an array and use it.
o Minor whitespace alignment
o make no slots found a printf not a panic.
spending, which was unused now that all software interrupts have
their own thread. Make the legacy schednetisr use an atomic op
for setting bits in the netisr mask.
Reviewed by: jhb
HID passed in as an argument at all; callers are typically going to be
sending us static strings anyway.
Submitted by: Munehiro Matsuda <haro@tk.kubota.co.jp>
Also, while here, run up to 32 interrupt sources on APIC systems.
Normalize INTREN/INTRDIS so they are the same on both UP and SMP systems
rather than sometimes a macro, and sometimes a function.
Reviewed by: jhb, jakeb
field in CDB' error when attempting to start a caddy-type CD drive,
since those drives apparently in general refuse to load a medium. Since
we never advertised the feature to load the medium upon calling
cdstartunit() (i. e. upon receipt of a CDIOCSTART ioctl command), nobody
should have relied on it. Besides, nobody noticed so far at all that
this command is failing for caddy-type drives... Only few applications
seem to use it at all (among them is workman, which made me notice it).
Reviewed by: ken
tweak to enable/disable interrupt sources. Seems to work. It is unclear
how many of the PC164 models actually might needs this, and whether or
not there are other hidden issues.
Obtained from:Bernd Walter <ticso@cicely8.cicely.de>
MPLOCKED macro
(2) Use decimal 12 rather than hex 0xc in an addl
(3) Implement MTX_ENTER for the I386_CPU case
(4) Use semi-colons between instructions to allow MTX_ENTER
and MTX_ENTER_WITH_RECURSION to be assembled
(5) Use incl instead of incw to increment the recusion count
(6) 10 is not a valid label, use 7, 8 and 9 rather than 8, 9 and 10
(7) Sort numeric labels
Submitted by: bde (2, 4, and 5)
on. So stop failing the attach if the IRQ is unassigned. With this
patch, I can now boot with PNP-OS YES in my BIOS no differently than
PNP-OS NO (which is a good thing since Windows hangs with PNP-OS NO).
Obtained from: msmith
- standardise error reporting for commands
- simplify the driver-to-controller bio transfer
- add bio in/out accounting
- correctly preserve the command ID in twe_ioctl (thanks to joel@3ware)
pushl that of the new process, rather than doing a movl (%esp) and
assuming that the stack has been setup right. This make the initial
stack setup slightly more sane, and will make it easier to stick
an interrupted process onto the run queue without its knowing.
and numvnodes are longs in the kernel. They should remain longs in systat,
what really needs to change is that they should be using SYSCTL_LONG rather
than SYSCTL_INT. I also changed wantfreevnodes to SYSCTL_LONG because I
happened to notice it.
I wish there was a way to find all of these automatically..
Pointed out by: bde
There is no more TAILQ fifo to harvest the entropy; instead, there
is a circular buffer of constant size (changeable by macro) that
pretty dramatically improves the speed and fixes potential slowdowns-
by-locking.
Also gone are a slew of malloc(9) and free(9) calls; all harvesting
buffers are static.
All-in-all, this is a good performance improvement.
Thanks-to: msmith for the circular buffer concept-code.
(specifically, how many entries we've looked at so far). Maintain
interrupt instrumentation. Use USEC_SLEEP instead of USEC_DELAY in
a number of places (this allows us to drop locks and sleep instead
of spin). Track changes to configuration options for topology preference.
Fix botched order of printout for Channel, Target, Lun.
from struct proc, which are now unused (p_nthread already was).
Remove process flag P_KTHREADP which was untested and only set
in vfs_aio.c (it should use kthread_create). Move the yield
system call to kern_synch.c as kern_threads.c has been removed
completely.
moral support from: alfred, jhb
not return ENOEXEC. This is because image activators should return -1 if they
don't claim an image. They should return ENOEXEC if they do claim it,
but cannot load it due to sime problem with the image. This bug was
preventing static compilation of the osf/1 module. I'm surprised it
did not cause more problems.
EOI after the ithread runs, send the EOI when we get the interrupt and
disable the source. After the ithread is run, the source is renabled.
Also, add isa_handle_fast_intr() which handles fast interrupts by sending
an EOI after the handler is run.
This fixes the chronic missing interrupt problems under heavy NFS load
on my UP1000 and should result in greater stability for alphas which
route all irqs through an isa pic.
Discussed with: jhb, bde (sending non-specific EOIs early was bde's idea)
like the args to the config space accessors these functions replaced.
This reduces the likelyhood of overflow when the args are used in
macros on the alpha. This prevents memory management faults when
probing the pci bus on sables, multias and nonames.
Approved by: dfr
Tested by: Bernd Walter <ticso@cicely8.cicely.de>
- Use ACPI_PHYSICAL_ADDRESS
- RSDT -> XSDT
- FACP -> FADT
- No APIC table support
- Don't install a global EC handler; this has bad side-effects
(it invokes _REG in *all* EC spaces in the namespace!)
- Check for PCI bus instances already existing before adding them
but a hack! Add `flags 0x8000' to the psm driver to enable it.
The psm driver will try to get out of out-of-sync situation
by disabling the mouse and immediately enable it again.
If you are seeing this out-of-sync problem because of an
incompetent(?!) KVM switch, this hack will NOT be good
for you. However, if you are occasionally seeing the
problem because of lost mouse interrupt, this might help.
lock. Otherwise, if we block on the backing mutex while releasing the
allproc lock, then when we resume, we will be at SRUN, and we will stay
that way all the way through cpu_exit. As a result, our parent will never
harvest us.
depend on MUTEX_DEBUG. The MUTEX_DEBUG option turns on extra assertions
and checks to verify that mutexes themselves are implemented properly.
The WITNESS option uses extra checks and diagnostics to verify that other
code is using mutexes properly.
passed vnode must be locked; this is the case because of calls
to VOP_GETATTR(), VOP_ACCESS(), and VOP_OPEN(). This becomes
more of an issue when VOP_ACCESS() gets a bit more complicated,
which it does when you introduce ACL, Capability, and MAC
support.
Obtained from: TrustedBSD Project
recently discussed at -hackers. The problem is a null-pointer
dereference that happens in kern/vfs_lookup.c when accessing ".."
with a v_mount entry for the current directory vnode of NULL. This
happens when a volume is forcibly unmounted, and the vnode for a
working directory in the mounted volume is cleared.
PR: 23191
Submitted by: Thomas Moestl <tmoestl@gmx.net>
locking the global hash on each uifree()
make struct uidinfo only visible to the kernel
make uihold() a function rather than a macro to reduce bloat
swap the order of a spl/mutex to maintain consistancy
process is on the alternate stack or not. For compatibility
with sigstack(2) state is being updated if such is needed.
We now determine whether the process is on the alternate
stack by looking at its stack pointer. This allows a process
to siglongjmp from a signal handler on the alternate stack
to the place of the sigsetjmp on the normal stack. When
maintaining state, this would have invalidated the state
information and causing a subsequent signal to be delivered
on the normal stack instead of the alternate stack.
PR: 22286
-current and RELENG_4 with GENERIC.
NKPT is the number of initial bootstrap page table pages we create for
the kernel during startup. Once VM is up, we resize it as needed, but
with 4G ram, the size of the vm_page_t structures was pushing it over
the limit. The fact that trimmed down kernels boot on 4G ram machines
suggests that we were pretty close to the edge.
The "30" is arbitary, but smaller than the 'nkpt' variable on all
machines that I checked.
- Use a better test for determining when a process is running.
- Convert some checks to assertions.
- Remove unnecessary tests.
- Save the priority before acquiring a mutex rather than in msleep(9).
4) The cardbus CIS code treats the CIS_PTR as a mapping register if
it is mentioned in the CIS. I don't have a spec handy to understand
why the CIS_PTR is mentioned in the CIS, but allocating a memory range
for it is certainly bogus. My patch ignores bar #6 to prevent the
mapping.
[The pccard spec says that BAR 0 and 7 (-1 and 6 in thic case since we
did a minus one) is "reserved". The off by 1 error has been fixed.
also bar=5 is invalid for IO maps, so we check it.]
5) The CIS code allocated duplicate resources to those already found
by cardbus_add_resources(). The fix is to pass in the bar computed
from the CIS instead of the particular resource ID for that bar,
so bus_generic_alloc_resource succeeds in finding the old resource.
[fixed, also removed superfluous (and incorrect) writing back to the
PCI config space.]
7) The CIS code seems to use the wrong bit to determine rather a particular
register mapping is for I/O or memory space. From looking at the
two cards I have, it seems TPL_BAR_REG_AS should be 0x10 instead
of 0x08. Otherwise, all registers that should be I/O mapped gain
a second mapping in memory space.
[Oops, the spec does say 0x10..., fixed]
Submitted by: Justin Gibbs
Providing shell scripts that do nothing but load a similarly named
kernel loadable module in out of vogue.
There is no ibcs2(4) manual page, and I haven't managed to coax
anyone into contributing one based on the linux(4) manual page.
our kernel module system learned how to handle dependencies.
Providing a whole bunch of shell scripts that do nothing but load
a similarly named kernel loadable module is out of vogue.
The svr4(8) manual page has been replaced with a much better svr4(4)
page.
timeout. If DIAGNOSTIC is turned on, then display a message to the console
with a map of which CPUs failed to stop or restart. This gives an SMP box
at least a fighting chance of getting into DDB if one of the other CPUs has
interrupts disabled.
Fix amr_map_command so that 40LD-specific commands get the scatter-gather
list count in the right place. I don't understand why AMI did it like
this, but now the AMI MegaManager can talk to the newer (1600 and later)
controllers.
Remove an unused variable.
Include <machine/clock.h> when necessary.
Tweak some debugging levels to make things more intelligible.
