Commit Graph

127 Commits

Author SHA1 Message Date
Peter Wemm
af3d516f55 Initiate de-orbit burn for USE_PCI_BIOS_FOR_READ_WRITE. This has been
#if'ed out for a while.  Complete the deed and tidy up some other bits.

We need to be able to call this stuff from outer edges of interrupt
handlers for devices that have the ISR bits in pci config space.  Making
the bios code mpsafe was just too hairy.  We had also stubbed it out some
time ago due to there simply being too much brokenness in too many systems.
This adds a leaf lock so that it is safe to use pci_read_config() and
pci_write_config() from interrupt handlers.  We still will use pcibios
to do interrupt routing if there is no acpi.. [yes, I tested this]

Briefly glanced at by:  imp
2003-02-18 03:36:49 +00:00
Poul-Henning Kamp
152e80d952 Outdent the string rather than use concatenation. 2002-12-23 22:12:17 +00:00
Warner Losh
a4bbd12ff1 MFp4:
o Fix small style nit.  This was supposed to be part of the last batch of
  style fixes, but somehow didn't get merged.
2002-11-14 05:22:37 +00:00
Peter Wemm
41f778bb99 Recognize the Serverworks CIOB30 host to pci bridge. 2002-11-13 21:30:44 +00:00
Warner Losh
ce494452fe MFp4:
o It turns out that we always need to try to route the interrupts for
  the case where the $PIR tells us there can be only one.  Some machines
  require this, while others fail when we try to do this (bogusly, imho).
  Since we have no apriori way of knowing which is which, we always try to
  do the routing and hope for the best if things fail.
o Add some additional comments that state the obvious, but amplify it in
  non-obvious ways (judging from the questions I've gotten).

This should un-break older laptops that still have to use PCIBIOS to route
interrupts.

Tested by: sam
2002-11-02 22:35:24 +00:00
Warner Losh
984de797ff Use 0xffffffff instead of -1 for id to compare against.
Use exact width types, since this is a MD file and won't be used elsewhere.
Fix a couple of resulting printf breakages

Bug found by: phk using Flexlint
2002-11-02 22:32:04 +00:00
Poul-Henning Kamp
7f30cdf366 Revert last commit, there actually was a -1 waaaaay down in pcireg_cfgread(). 2002-10-20 17:54:17 +00:00
Poul-Henning Kamp
a67ee49294 "id" is never going to be -1 when it is unsigned.
Spotted by:	FlexeLint
2002-10-20 17:21:43 +00:00
John Baldwin
a73f15c7a8 Use the global pcib devclass instead of our own static copy. 2002-10-16 18:38:35 +00:00
Warner Losh
ea5420299c o go ahead and route the interupt, even if it is supposedly unique.
there are some strange machines that seem to need this.
o delete bogus comment.
o don't use the the bios for read/writing config space.  They interact badly
  with SMP and being called from ISR.  This brings -current in line with
  -stable.

# make the latter #ifdef on USE_PCI_BIOS_FOR_READ_WRITE in case we
# need to go back in a hurry.
2002-10-07 05:15:05 +00:00
Mitsuru IWASAKI
2f00e60504 Add 2 Ids for new ServerWorks host to PCI bridge chipset.
These are still unknown name but these are working as well
as the other ServerWorks chipset.
Description strings should be corrected when the chipsets
are known.

MFC after:	1 week
2002-10-02 17:50:38 +00:00
Poul-Henning Kamp
cb8e433232 Don't call function in return() for a void function. 2002-09-28 17:36:29 +00:00
John Baldwin
b8581e0d56 Now that we only probe host-PCI bridges once, we no longer have to check to
see if we have been probed before by checking for a pciX bus device.
2002-09-23 18:14:31 +00:00
John Baldwin
8ff25e9763 Put verbose printf's in the PCI BIOS interrupt routing code under
if (bootverbose).
2002-09-23 18:13:42 +00:00
John Baldwin
2ab55f4392 Change the nexus_pcib driver (eventually to be renamed to legacy_pcib) to
hang off of the legacy driver instead of the nexus.
2002-09-23 15:52:30 +00:00
John Baldwin
fe4663379e Axe unused include. 2002-09-20 19:16:41 +00:00
John Baldwin
fefe985dc6 Make sure a $PIR table header has a valid length before accepting the table
as valid.

Submitted by:	Michal Mertl <mime@traveller.cz>
2002-09-09 18:24:35 +00:00
Poul-Henning Kamp
a0c422db00 #include "opt_bla.h" goes first says Bruce. 2002-09-09 08:44:52 +00:00
Poul-Henning Kamp
9339569236 Fix style(9) bugs.
Brucified by:	bde
2002-09-08 15:16:49 +00:00
John Baldwin
7bbb0b56e4 Add a subclass of the PCI-PCI bridge driver that uses the PCIBIOS to
route interrupts if the child bus is described in the PCIBIOS interrupt
routing table.  For child busses that are in the routing table, they do
not necessarily use a 'swizzle' on their pins on the parent bus to route
interrupts for child devices.  If the child bus is an embedded device then
the pins on the child devices can be (and usually are) directly connected
either to a PIC or to a Interrupt Router.  This fixes PCIBIOS interrupt
routing across PCI-PCI bridges for embedded devices.
2002-09-06 22:19:39 +00:00
John Baldwin
c3ba1376f5 Add a function pci_probe_route_table() that returns true if our PCI BIOS
supports interrupt routing and if the specified PCI bus is present in the
routing table.
2002-09-06 22:15:44 +00:00
John Baldwin
facfd6e8ed Dump the $PIR table if booting verbose. 2002-09-06 19:25:25 +00:00
John Baldwin
8ab96fd8d0 - Add a pci_cfgintr_valid() function to see if a given IRQ is a valid
IRQ for an entry in a PCIBIOS interrupt routing ($PIR) table.
- Change pci_cfgintr() to except the current IRQ of a device as a fourth
  argument and to use that IRQ for the device if it is valid.
- If an intpin entry in a $PIR entry has a link of 0, it means that that
  intpin isn't connected to anything that can trigger an interrupt.  Thus,
  test the link against 0 to find invalid entries in the table instead of
  implicitly relying on the irqs field to be zero.  In the machines I have
  looked at, intpin entries with a link of 0 often have the bits for all
  possible interrupts for PCI devices set.
2002-09-06 17:08:07 +00:00
John Baldwin
fbabd7bec2 Add support for printing out the contents of a PCI BIOS $PIR interrupt
routing table on the console.  Eventually it will be printed during
verbose boots.
2002-09-06 16:10:12 +00:00
John Baldwin
cea0a89545 Prefer the physical bus number of the PCI bus as the unit of the pciX
device created.
2002-09-06 16:09:07 +00:00
John Baldwin
5264a94f3f Test PCIbios.ventry against 0 to see if we found a PCIbios entry point,
not the 'entry' member.  The entry point is formed from both a base and
a relative entry point.  'entry' is that relative offset.  It is perfectly
valid to have an entry point with a relative offset of 0.  PCIbios.ventry
is the virtual address of the entry point that takes both 'base' and
'entry' into account, thus it is the proper variable to test to see if we
have an entry point or not.
2002-09-05 17:07:07 +00:00
Poul-Henning Kamp
bd8add3d61 Change the support for AMDs ElanSC520 CPU from being a device driver to
be
	options	CPU_ELAN
(NB: Soekris.com users!)

It is cleaner this way.  We still recognize the cpu on the host-pci bridge.
2002-09-04 19:43:22 +00:00
Poul-Henning Kamp
14a3a6ea0b Move a prototype to the least wrong place.
Suggested by:	bde
2002-08-02 18:45:43 +00:00
Warner Losh
e300f53ca2 style(9)ize the whole file
Approved in concept a long time ago by: msmith
2002-07-21 05:35:42 +00:00
Andrew Gallatin
f76ec8facd Add support for probing secondary buses on the ServerWorks Grand Champion
chipset used for P4-Xeon machines

PR: kern/38894
Tested-by: "Marc G. Fournier" <scrappy@hub.org>
Submitted-by: Mark Tinguely (partially)
2002-07-19 18:35:08 +00:00
Poul-Henning Kamp
61658cf6a1 Add initialization code for the AMD Elan sc520 which maps the MMCR
into KVM and sets the i8254 frequency to the correct value.
2002-07-18 12:56:54 +00:00
Poul-Henning Kamp
3ae87b7ec6 Add an entry for the AMD Elan SC520 hostbridge. I do not belive we can
identify this gadget on the CPUID result alone, so I intend to activate
the necessary magic (i8254 frequency for instance) for it based on the
precense of the on-chip host to PCI bridge.
2002-07-18 10:57:20 +00:00
Warner Losh
8ce1ab3a24 Use a common function to map the bogus intlines.
Don't require pin be non-zero before we map bogus intlines, always do it.
This fixes a number of problems on HP Omnibook computers.

Tested/Reviewed by: Brooks Davis
2002-06-01 05:14:11 +00:00
Brooks Davis
26722a1909 Restore the irq=0 => irq=255 hack to pci_cfgintr_search(). Just having
it in pci_cfgregread() wasn't sufficent on at least the HP Omnibook 500.

Reviewed by:	imp
2002-05-29 16:16:16 +00:00
Warner Losh
d5ccecfad7 o Work around bugs in the powerof2 macro: It thinks that 0 is a power of
2, but that's not the case.  This fixes the case where there were slots
  in the PIR table that had no bits set, but we assumed they did and used
  strange results as a result.
o Map invalid INTLINE registers to 255 in pci_cfgreg.c.  This should allow
  us to remove the bogus checks in MI code for non-255 values.

I put these changes out for review a while ago, but no one responded
to them, so into current they go.

This should help us work better on machines that don't route
interrupts in the traditional way.

MFC After: 4286 millifortnights
2002-04-24 15:30:11 +00:00
Warner Losh
e5d7e9c76c Fix a PNPID in a comment
Submitted by: David Xu
2002-04-24 15:22:53 +00:00
Nicolas Souchu
c17d43407f Major rework of the iicbus/smbus framework:
- VIA chipset SMBus controllers added
	- alpm driver updated
	- Support for dynamic modules added
	- bktr FreeBSD smbus updated but not tested
	- cleanup
2002-03-23 15:49:15 +00:00
Warner Losh
654d58ca24 Don't call the bios if the interrupt appaers to be already routed. Some
older PCI BIOSes hate this and this leads to panics when it is done.  Also,
assume that a uniquely routed interrupt is already routed.  This also
seems to help some older laptops with feable BIOSes cope.
2002-03-16 23:02:41 +00:00
Warner Losh
a8c18609ec The Libretto L series has no $PIR table, but does have a _PIR table.
This typo keeps us from properly routing an interrupt for CardBus
bridges on this machine.  So, now we look for $PIR and then _PIR to
cope.  With these changes, the Libretto L1 now works properly.
Evidentally, the idea comes from patch that the Japanese version of
RedHat (or against a Japanese version of Red Hat), but my Japanese
isn't good enough to to know for sure.

Reported by: Hiroyuki Aizu-san <eyes@navi.org>

# This may be an MFC candidate, but I'm not yet sure.
2002-01-20 03:28:29 +00:00
Murray Stokely
b0ae3ab3fe Add identification string for AMD-761 host to PCI bridge.
PR:	kern/32255
2001-12-10 09:27:00 +00:00
Warner Losh
1cf5f5552b MFS: I was confused. This code wasn't in -current after all.
Merge in the irq 0 detection.  Add comment about why.

If we have irq 0, ignore it like we do irq 255.  Some BIOS writers aren't
careful like they should be.
2001-11-26 21:25:03 +00:00
Warner Losh
d3b6477a19 It turns out that while Toshiba laptops don't want to route interrupts
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.
2001-08-28 16:35:01 +00:00
Warner Losh
d626906b0c MFS: IRQ ordering, PRVERB and more whining in pcibios_get_version on failure.
Check return value from bios32.

[[ Yes, I was bad and committed this to stable first.  I should have done
   the commit in the other order. ]]
2001-08-27 20:44:38 +00:00
Warner Losh
0b9427de88 The general conesnsus on irc was that pci bios for config registers
and such was just a bad idea and one that users should be forced to
enable if they want it.  This patch introduces a hw.pci.enable_pcibios
tunable for those people.  This does not impact the pcibios interrupt
routing at all.

Approved by: peter, msmith
2001-08-21 07:53:37 +00:00
Peter Wemm
573be82757 Detect a certain type of PCIBIOS brain damage. For some reason,
some bios vendors took it apon themselves to "censor" the
host->pci bridges from PCIBIOS callers, even when the caller
explicitly asks for them.  This includes certain Compaq machines
(eg: DL360) and some laptops.

If we detect this, shut down pcibios and revert to using IO
port bashing.

Under -current, apcica does a better job anyway.
2001-08-21 03:10:55 +00:00
Mike Smith
85fab96387 Un-swap irq/link byte values so that printf works. 2001-05-11 04:52:29 +00:00
Mike Smith
6c9eb5f3a6 Free the memory we get from devclass_get_devices and device_get_children.
Submitted by:	wpaul
2001-02-08 20:44:49 +00:00
Peter Wemm
47c6b72621 Fix a warning due to missing prototype. 2001-01-19 09:10:14 +00:00
Bosko Milekic
6a47d852b9 Remove declaration of airq variable from outer block. There were two
declarations of a variable of the same name. The one in the outer block
was unused and probably just slipped in at one point or another. This
silences a compiler warning.
2001-01-12 07:49:29 +00:00
Mike Smith
bb0d0a8efc Next phase in the PCI subsystem cleanup.
- Move PCI core code to dev/pci.
 - Split bridge code out into separate modules.
 - Remove the descriptive strings from the bridge drivers.  If you
   want to know what a device is, use pciconf.  Add support for
   broadly identifying devices based on class/subclass, and for
   parsing a preloaded device identification database so that if
   you want to waste the memory, you can identify *anything* we know
   about.
 - Remove machine-dependant code from the core PCI code.  APIC interrupt
   mapping is performed by shadowing the intline register in machine-
   dependant code.
 - Bring interrupt routing support to the Alpha
   (although many platforms don't yet support routing or mapping
   interrupts entirely correctly).  This resulted in spamming
   <sys/bus.h> into more places than it really should have gone.
 - Put sys/dev on the kernel/modules include path.  This avoids
   having to change *all* the pci*.h includes.
2000-12-08 22:11:23 +00:00