Commit Graph

218 Commits

Author SHA1 Message Date
John Baldwin
a56fe095f0 Temporarily revert the new-bus locking for 8.0 release. It will be
reintroduced after HEAD is reopened for commits by re@.

Approved by:	re (kib), attilio
2009-08-20 19:17:53 +00:00
Attilio Rao
444b91868b Make the newbus subsystem Giant free by adding the new newbus sxlock.
The newbus lock is responsible for protecting newbus internIal structures,
device states and devclass flags. It is necessary to hold it when all
such datas are accessed. For the other operations, softc locking should
ensure enough protection to avoid races.

Newbus lock is automatically held when virtual operations on the device
and bus are invoked when loading the driver or when the suspend/resume
take place. For other 'spourious' operations trying to access/modify
the newbus topology, newbus lock needs to be automatically acquired and
dropped.

For the moment Giant is also acquired in some key point (modules subsystem)
in order to avoid problems before the 8.0 release as module handlers could
make assumptions about it. This Giant locking should go just after
the release happens.

Please keep in mind that the public interface can be expanded in order
to provide more support, if there are really necessities at some point
and also some bugs could arise as long as the patch needs a bit of
further testing.

Bump __FreeBSD_version in order to reflect the newbus lock introduction.

Reviewed by:    ed, hps, jhb, imp, mav, scottl
No answer by:   ariff, thompsa, yongari
Tested by:      pho,
                G. Trematerra <giovanni dot trematerra at gmail dot com>,
                Brandon Gooch <jamesbrandongooch at gmail dot com>
Sponsored by:   Yahoo! Incorporated
Approved by:	re (ksmith)
2009-08-02 14:28:40 +00:00
Andrew Thompson
853a10a581 Revert r190676,190677
The geom and CAM changes for root_hold are the wrong solution for USB design
quirks.

Requested by:	scottl
2009-04-10 04:08:34 +00:00
Andrew Thompson
626fc9fe3d Add a how argument to root_mount_hold() so it can be passed NOWAIT and be called
in situations where sleeping isnt allowed.
2009-04-03 19:46:12 +00:00
Warner Losh
bca6fb928e Better name for this routine... it doesn't reset the card, but resets
the power to the card...
2009-03-12 06:25:30 +00:00
Warner Losh
993b1ae273 Hold off root mounting until we've gone through the loop of our thread
almost once.  After we've configured the devices that were present the
first time through, then we know that we're done.  If the device has
other devices that are deferred, then it must do a similar dance.
This catches both PC Cards and CardBus cards.
2009-02-17 02:14:04 +00:00
Warner Losh
a620f9a577 Correct signatures to match kobj function definitions. 2009-02-04 21:11:31 +00:00
Warner Losh
d0493c85a6 Update to the interrupt handling code:
o Try to be smarter about reading the ExCA CSC register.  Now, we only
  do it for 16-bit cards.  Add some experimental code to treat it like
  a power interrupt, but I'm not 100% sure that I like it.  It may be
  removed upon further testing.  It seemed to help in one test case, but
  the evidence may be inconclusive.  This may be beneficial for cleaning up
  exca_reset and exca_wait_ready.
o Check for CSTS events on the socket event register.  We ask for it when
  we're powering up a card, but I don't think we're otherwise using
  it.  Just ACK the interrupt for now.  In theory, we can use it
  instead of the busy wait we do in cbb_cardbus_reset.  More research
  is necessary to see if we can optimize things there when we're
  waiting for the DEVVENDOR register to become valid.
o Rework the comments a bit.  Minor tidying up.  Etc.
2008-12-11 06:27:18 +00:00
Warner Losh
f2323a477f Minor tweaks to some of the comments. Also, add a XXX wondering if we
need to frob the 16-bit EXCA registers during the new interrupt-driven
power-up sequence.
2008-12-07 22:49:47 +00:00
Warner Losh
a5d1eba6cf Use '0' rather than PZERO to not change the priority that I'm waiting
at.  I don't think this will make a huge difference, but I have
received a report of a interrupt storm on one 16-bit card that this
might fix (chances are it won't, since I think that we may need to
check both the CBB registers for the 16-bit card as well as the PCIC
registers for power state change).

Submitted by:	jhb@
2008-12-07 18:34:27 +00:00
Warner Losh
3e7d0bebac Use atomic_add_int rather than a simple ++ to ensure no cache races if
the power interrupt and init code waiting for the interrupt are
running on different CPUs.  I haven't seen this make any real
difference, but I've also had some reports of odd behavior I can't
otherwise explain.  It is an infrequent operation, and certainly
wouldn't hurt.
2008-12-07 18:32:09 +00:00
Warner Losh
5b9ee137aa Move to using filter for the change interrupts. Also rework the power
interrupt code to be more robust.  I've been running these changes for
over a year...  With these changes, I don't see the ath card going
into reset like the code in the tree.
2008-12-05 05:20:08 +00:00
Warner Losh
ca446278b1 Minor style nit. 2008-12-05 04:48:04 +00:00
Warner Losh
f40b0e2e97 Augment comments, and move things around a smidge. 2008-12-05 04:46:26 +00:00
Warner Losh
414f7ec8bd Implement a method described in NetBSD PR 36652 for coping with the
BAD VCC bit.
2008-12-05 04:43:25 +00:00
Warner Losh
a3f223e26a Return BUS_PROBE_GENERIC rather BUS_PROBE_DEFAULT for generic CBB we match.
Reviewed by:	jhb@
2008-10-02 22:50:11 +00:00
Warner Losh
6e31e5ebde Don't forget to match on a CLASS of PCIC_BRIDGE as well as subclass
PCIS_BRIDGE_CARDBUS.  Otherwise, we may hit a few false positives....
2008-10-02 06:29:45 +00:00
Warner Losh
8e6604f8d5 Read the config space of the child, not the bridge, to determine when
the child is out of reset... <blush>
2008-08-10 09:55:14 +00:00
Warner Losh
d1a8ac92a9 fix typo
Submitted by:	N.J. Mann
2008-08-09 17:29:36 +00:00
Warner Losh
e6501bf131 It turns out that checking the first DWORD register is more reliable
on a variety of cards.  Adjust the comments accordingly to match the
code.  Even if the vendor chose 0xffff for the device ID, the vendor
ID can't be 0xffff, so the test is still valid from a standards
perspective.
2008-08-09 15:55:10 +00:00
Warner Losh
1b146a73ee After some intial testing, there are even slower cards than the ones
that I have.  Wait up to 1.1s for the card to become ready.  Document
what the standards say, and use that to justify the behavior in the
code: PCI standard says that a card must respond to configuration
cycles within 2^25 cycles after reset goes high, which is
approximately 1s.  Therefore, give cards a little break and wait for
up to 1.1s for VENDOR to become valid.  Only look at the vendor part
of the ID, since only it can't be 0xffff (although in practice
vendor/device will always be != 0xfffffffff).  Include detailed
pointers to standards so epople understand why we're doing what we're
doing and why it just might be OK.  Make it clear in the timeout
message that it is just a warning, sinc we try to soldier on as best
we can anyway.

This should eliminate an error message that r181453 produced on
certain Atheros cards.
2008-08-09 07:41:18 +00:00
Warner Losh
bfd58cce84 Rather than waiting a fixed amount of time, which might not be enough
and also holds things up, check every 20ms to see if we can read the
vendor of device 0.0.  It will be 0xffffffff until the card is out of
reset.  Always wait at least 20ms, for safety.

I think this is a better fix to the reset problem.  However, I did it
as a separate commit in case something bad happens, people can roll
back to the commit before this one to see if that gives them reliable
behavior.  I don't have FreeBSD up on enough machines to do exhaustive
testing on all known bridges...
2008-08-09 04:08:36 +00:00
Warner Losh
ae438af62d While most bridges can bring a card out of reset in 20ms, there are
some bridge + card combinations that take longer for reasons unknown.
Adjust the timeout to be 100ms on all !RICOH bridges, but leave RICOH
at 400ms.  The 400ms is "lore" from other open source projects, and
I've never see my ricoh bridge chips take this long.  Maybe it is the
same thing?  Maybe a bit should be read instead of a hard-wired pause?

After this adjustment, a few cards that I'd insert and get only:
	cbb0: card_power: 3V
	cbb0: card_power: 0V
with full debugging enabled would actually try to attach.

Reported by:	sam@ (I think)
MFC after:	3 days
2008-08-09 03:37:12 +00:00
Julian Elischer
3745c395ec Rename the kthread_xxx (e.g. kthread_create()) calls
to kproc_xxx as they actually make whole processes.
Thos makes way for us to add REAL kthread_create() and friends
that actually make theads. it turns out that most of these
calls actually end up being moved back to the thread version
when it's added. but we need to make this cosmetic change first.

I'd LOVE to do this rename in 7.0  so that we can eventually MFC the
new kthread_xxx() calls.
2007-10-20 23:23:23 +00:00
Marius Strobl
55aaf894e8 Make the PCI code aware of PCI domains (aka PCI segments) so we can
support machines having multiple independently numbered PCI domains
and don't support reenumeration without ambiguity amongst the
devices as seen by the OS and represented by PCI location strings.
This includes introducing a function pci_find_dbsf(9) which works
like pci_find_bsf(9) but additionally takes a domain number argument
and limiting pci_find_bsf(9) to only search devices in domain 0 (the
only domain in single-domain systems). Bge(4) and ofw_pcibus(4) are
changed to use pci_find_dbsf(9) instead of pci_find_bsf(9) in order
to no longer report false positives when searching for siblings and
dupe devices in the same domain respectively.
Along with this change the sole host-PCI bridge driver converted to
actually make use of PCI domain support is uninorth(4), the others
continue to use domain 0 only for now and need to be converted as
appropriate later on.
Note that this means that the format of the location strings as used
by pciconf(8) has been changed and that consumers of <sys/pciio.h>
potentially need to be recompiled.

Suggested by:	jhb
Reviewed by:	grehan, jhb, marcel
Approved by:	re (kensmith), jhb (PCI maintainer hat)
2007-09-30 11:05:18 +00:00
Warner Losh
6e878bc765 Migrate from setting a CARD_OK flag in a shared word, to setting its
own entry in the softc.  This should allow more of cbb_pci_intr() to
migrate to a new cbb_pci_filt() so that we don't have to run cbb's ISR
in almost every case we get an interrupt.  We can't just move
cbb_pci_intr into cbb_pci_filt because it does things that aren't safe
to do from a fast interrupt handler, err I mean from a filter.  This is
an important first step.

# I wonder if I need to make cardok volatile or not.
2007-06-04 05:59:44 +00:00
Warner Losh
16f89cb420 Don't register cb_func_filt if the client driver doesn't have a filter.
ditto for the isr.

Reviewed/Suggested by: simokawa-san
2007-06-04 03:13:24 +00:00
Warner Losh
cf924571a3 Minor filter tweaks:
o If we don't have a filter, also check to make sure the card is there before
  calling the scheduled ISR.  This is necessary to help old drivers whose
  ISRs can't cope with being called with the hardware missing, which sadly
  still exist in the tree.  This is the main reason why we have an extra
  layer of indirection for cardbus interrupts.
o If the card is no longer present, mark the interrupt as 'handled' rather
  than 'stray' because this accounts for why the interrupt happened.  Stray
  isn't all bad, since there are other filters that would claim it...
o Fix some comments
  + Add comment about why we check for CARD_OK and touch the hardware in both
    the filter and ISR.
  + add a note about why we don't care about Giant
  + also note that giant can't be taken out in a filter...
  + Some minor formatting nits on very long comments.
2007-06-03 05:42:05 +00:00
Paolo Pisati
97caddeea2 Make the interrupt handler wrapper capable of correctly support filter+ithread handler.
Discussed and reviewed with: bsdimp, simokawa
2007-05-31 19:29:20 +00:00
Warner Losh
26432f7ba2 o Don't hold lock over bus_teardown_intr when we're waiting for the
thread to die, since that can cause deadlock with the ISR (in theory).
o Minor cleanup
o comment nit
2007-05-16 19:53:49 +00:00
Warner Losh
af3bdf60d5 Better message on cbb resource alloc failure 2007-05-16 18:44:56 +00:00
Warner Losh
a9d4f3ded4 Use different wait channel name for second of two sleeps. Minor commentary
addition.
2007-03-05 05:40:24 +00:00
Warner Losh
8c6c85bef3 Reduce the number of retries to 10 from 20 for not_a_card retry test.
Add some comments to explain how 10 was picked.  20 was completely
arbitrary, at least 10 has some reasoning behind it.

Also, update the comments about how long we sleep to reflect the new,
shorter timeout we use.
2007-03-04 19:33:12 +00:00
John Baldwin
8410d79dd1 Use pause() instead of tsleep()'s on the softc pointer that have no
corresponding wakeups.  Also, at least some of the comments nearby indicate
that these are fixed-length I/O sleeps.
2007-02-27 17:27:23 +00:00
Paolo Pisati
ef544f6312 o break newbus api: add a new argument of type driver_filter_t to
bus_setup_intr()

o add an int return code to all fast handlers

o retire INTR_FAST/IH_FAST

For more info: http://docs.freebsd.org/cgi/getmsg.cgi?fetch=465712+0+current/freebsd-current

Reviewed by: many
Approved by: re@
2007-02-23 12:19:07 +00:00
Warner Losh
ca29e6e128 Two changes:
(1) change debounce period from 1s to 250ms.  This appears to be fine and
    speeds things up a little.
(2) In the middle of cbb_pcic_power_disable_socket we write 0 to the EXCA_INTR
    register to put the card into reset.  However, this turns off CSC
    interrupts for TI bridges (and maybe others).  So no further card
    insertion events would be noticed.  To compensate, after we've gone
    through the entire power down sequence, turn on EXCA_INTR_ENABLE so
    that CSC events happen.

#2 should fix the 'dead slot' problem that has been reported after
card ejection (but only 16-bit cards).
2007-02-16 05:36:59 +00:00
Warner Losh
33d7325a5f Fix typo in comment 2007-02-16 05:24:19 +00:00
Warner Losh
21de43a1ec It turns out that it is easier to not NULL out pccard and cardbus
device pointers.  They don't change as the children device drivers
come and go.  Rather, check to see if the device is attached where we
would have checked ! NULL.  This solves many asymmetries in the code
that likely could lead to crashes when loading/unloading cbb without
one or more of the expected children's driver not present.
2007-02-15 07:22:27 +00:00
Warner Losh
9d101a9556 Fix three bugs:
o When detaching all children, try really hard to get all the children
  list before giving up.  This is based on an observation by hans petter
  selasky in his usb p4 branch.
o When rescanning devices after a driver is added, abort if we can't get
  the child list with a message.
o when rescanning devices, if the reprobe/attach is successful, save the
  device for cardbus/pccard.
2007-02-15 07:13:38 +00:00
Warner Losh
673c9ca931 Batch of changes:
o when turning off the socket for a 16-bit card, write 0 to INTR register
  rather than just tying to just clear the rest bit.  this seems to fix
  card insert detection after an eject on TI bridges (ricoh bridges work
  either way, apparently).  This is a MFp4.
o Cope better with TOPIC95 bridges on powerup.  According to NetBSD driver,
  these bridges don't set POWER_STATE, so cope accordingly in our power
  code.  They also need a little extra time to settle, so do that as well.
o It appears that we need to turn on/off one of the clocks to the card
  when we power up/down that socket on a TOPIC97, also from NetBSD.
o TOPIC97 bridges need to specifically enable LV card support.  Unconditionally
  do this in the hopes that all laptops that have these chips support LV
  voltages (they should, since they are required for CardBus).
o TOPIC register name regularization.  Registers specific to models of TOPIC
  are now called out as such.

# I need a machine with a TOPIC95 for testing.
2006-08-12 09:06:55 +00:00
Warner Losh
f99cc4ad59 We don't have a ISA specific shutdown routine at this time, so remove
it.  We just moved it to be pci specific, so this was causing compile
problems (linking problems, so I didn't notice since I unwisely just
built the module).
2006-06-03 21:10:50 +00:00
Warner Losh
5a535f681f Since we turn off the interrupts, we don't need to disestablish
our ISR.
2006-06-03 21:05:36 +00:00
Warner Losh
7490082f08 Move shutdown, and pci specific methods into pccbb_pci.c. Many more
are needed still.
2006-06-03 19:16:45 +00:00
Warner Losh
fc7119a71e The interrupt routine is pci specific. Move it into pccbb_pci.c. 2006-06-03 19:07:16 +00:00
Warner Losh
7dcc4efb74 Fix a couple printf's to be properly terminated.
Use a better name for the cbb thread.
2006-06-03 18:58:48 +00:00
Warner Losh
083f44a5a1 Succeed for writing bus value... nobody that calls must care :-( 2006-06-03 18:57:28 +00:00
Warner Losh
32b35e59a3 Zero out the devices when they are deleted. We can access the pointer after
the bus detaches which can lead to core dumps.  This is quite rare.
2006-06-02 06:33:35 +00:00
Warner Losh
fef035542a Export the pribus, secbus and subbus as sysctls for information
purposes only.  Additional information may be exported in the future.
2006-05-24 17:27:55 +00:00
Warner Losh
2f6303b0f6 Suspend the children before we turn off card events in hardware. This
was done, I believe, to work around some cards having issues in the
suspend case.  I think that this helped my Sony VAIO TS505 work better
when it had certain wireless cards in it and I did a apm -z.  I've not
tested suspend/resume on other laptops in a long time, so I hope this
doesn't cause greif.  Please let me know if it does.
2006-05-24 17:26:16 +00:00
Warner Losh
1b2ec08c94 Fix a race when detaching the cbb worker thread. There were a couple
of cases where we didn't take out the lock before setting or clearing
a bit.  This apparently can lead to a race at kldunload time (at least
on my Turion64 laptop, never saw it on my Sony Vaio).
2006-05-24 17:22:53 +00:00