Date: Sun, 26 May 2002 22:14:41 -0400 (EDT) From: Thomas David Rivers <rivers@dignus.com> To: freebsd-hackers@freebsd.org, imp@village.org, rivers@dignus.com Subject: more info on pccard insertion hang... Message-ID: <200205270214.g4R2Ef483353@lakes.dignus.com>
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OK - after *many* additional printf()s, and following the
control flow through several twisty passages (all alike),
I've figured out _where_ the hang is happening.... but, not
why...
First - the card is inserted, and the various callbacks occur...
pccardd gets involved and reads the CIS to determine the kind
of card that was inserted.
We actually get through the pcic stuff, and through the
device probe and attach.
It's determined that the card is an ed-compatible ethernet
card. Then, we try to set the interrupt for that card.
(apparently, it's being set as an ISA interrupt number,
even though pcic is using PCI interrupts.)
This then hangs in pci_cfgdisable().
I'm hand-typing in the ddb trace results here, so forgive any
obvious typo:
--- interrupt, eip = 0xc0350d24, sp=0xc635eb14, ebp = 0xc635eb1c ---
pci_cfgdisable(c0cc1808,2,c635eb4c,c03506ae,0) at pci_cfgdisable+0x1c
pcireg_cfgwrite(0,c,0,3e,420) at pcireg_cfgwrite+0x54
pci_cfgregwrite(0,c,0,3e,420) at pci_cfgregwrite+0x1a
pci_cfgwrite(c0cc1808,3e,420,2,c0396702,c0396630,c0cc1780,c03966c0,c0396697) at pci_cfgwrite+0x23
pci_write_config_method(c0cbd180,c0cc1780,3e,420,2) at pci_write_config_method+0x4e
PCI_WRITE_CONFIG(c0cbd180,c0cc1780,3e,420,2) at PCI_WRITE_CONFIG+0x3a
pcic_pci_gen_func(c0cc0a3c,2,c038d300,2,9) at pcic_pci_gen_func+0xa6
pcic_pci_ricoh_func(c0cc0a3c,2,c038d7e0,c0cc0a00,4) at pcic_pci_ricoh_fun+0x1d
pcic_pci_gen_mapirq(c0cc0a3c,9,c0e03000,c0ccac00,c0df2680) at pcic_pci_gen_mapirq+0x56
pcic_pci_setup_intr(c0cc1780,c0df2680,c0ded8c0,4,c031898c) at pcic_pci_setup_intr+0xc1
BUS_SETUP_ITR(c0cc1780,c0df2680,c0ded8c0,4,c031898c) at BUS_SETUP_INTR+0x40
bus_generic_setup_intr(c0ccac00,c0df2680,c0ded8c0,4,c031898c) at bus_generic_setup_intr+0x2e
BUS_SETUP_INTR(c0ccac00,c0df2680,c0ded8c0,4,c031898c) at BUS_SETUP_INTR+0x40
bus_setup_intr(c0df2680,c0ded8c0,4,c031898c,c0e03000) at bus_setup_intr+0x24
ed_pccard_attach(c0df2680,c635ed44,c01cdc05,c0df2680,c037ff53) at ed_pccard_attach+0x85
DEVICE_ATTACH(c0df2680,c037ff53,0,c0df2680,c0d4de00) at DEVICE_ATTACH+0x2e
device_probe_and_attach(c0df2680,c038c0e0,c0cc0800,c0ac5006,c59ef60) at dvice_probe_and_attach+0x8d
allocate_driver(c0cc0800,c0d4de00,c635ede4,c0ccab80,c595ef60) at allocate_driver+0x223
crdioctrl(c0ccab80,c0ac5006,c0d4de00,3,c595ef60) at crdioctl+0x3ca
spec_ioctl(c635ede4,c635edcc,c02db1fd,c635ede4,c635ee74) at spec_ioctl+0x26
spec_vnoperate(c635ede4,c635ee74,c01fabab,c635ede4,c0d10180) at spec_vnoperate+0x15
ufs_vnoperatespec(c635ede4,c0d10180,0,ac,a03bbf00) at ufs_vnoperatespec+0x15
vn_ioctl(c0d10180,c0ac5006,c0d4de00,c595ef60,c595ef60) at vn_ioctl+0x10f
ioctl(c595ef60,c635ef80,8072140,8072100,0) at ioctl+0x20a
syscall2(2f,2f,2f,0,8072100) at syscall2+0x1f5
Xin0x80_syscall(0 at Xint0x80_syscall+0x25
db>
So - it seems the "hang" is occuring when trying to
set up interrupts in the pcic_pci_gen_func() function.
Using liberal printf()s - I've determined that `way'
is pcic_iw_pci. So - it would seem that the
following should be executed:
bcr = pci_read_config(...) // bcr is 0x4a0
bcr &= ~CB_BCR_INT_EXCA; // bcr becomes 0x420
pci_write_config(..., bcr,2); <<<< hangs
Warner - any ideas?
I'm wondering - it seems we're trying to set the ethernet's
irq to #9 - which was also used for the pcic card... could there
be some non-obvious interrupt confusion here?
- Thanks! -
- Dave Rivers -
--
rivers@dignus.com Work: (919) 676-0847
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