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SubjectRe: Oops in UHCI when encountering "host controller process error"
Alan Stern wrote:
> The hardware starts running right at the end of uhci_start(), in the
> call to start_rh(). However according to those debugging lines you
> added to uhci_alloc_qh(), the DMA pool allocations are all messed up.
> Those initial allocations all occur within uhci_start(), in the
>
> for (i = 0; i < UHCI_NUM_SKELQH; ++i)
>
> loop. It sure looks like the DMA pool memory management needs
> attention.
>
>

Yep, there's something very odd going on in there. By contrast, does
this look OK? The allocations are fine, but I'm wondering if the
skeleton QH stuff is all correct; it seems to work OK in this state.

uhci_alloc_qh: uhci=ffff88002e5de3d0 qh=ffff88002e5f4000 handle=7e212000
uhci_alloc_qh: uhci=ffff88002e5de3d0 qh=ffff88002e5f4080 handle=7e212080
uhci_alloc_qh: uhci=ffff88002e5de3d0 qh=ffff88002e5f4100 handle=7e212100
uhci_alloc_qh: uhci=ffff88002e5de3d0 qh=ffff88002e5f4180 handle=7e212180
uhci_alloc_qh: uhci=ffff88002e5de3d0 qh=ffff88002e5f4200 handle=7e212200
uhci_alloc_qh: uhci=ffff88002e5de3d0 qh=ffff88002e5f4280 handle=7e212280
uhci_alloc_qh: uhci=ffff88002e5de3d0 qh=ffff88002e5f4300 handle=7e212300
uhci_alloc_qh: uhci=ffff88002e5de3d0 qh=ffff88002e5f4380 handle=7e212380
uhci_alloc_qh: uhci=ffff88002e5de3d0 qh=ffff88002e5f4400 handle=7e212400
uhci_alloc_qh: uhci=ffff88002e5de3d0 qh=ffff88002e5f4480 handle=7e212480
uhci_alloc_qh: uhci=ffff88002e5de3d0 qh=ffff88002e5f4500 handle=7e212500
Root-hub state: reset FSBR: 0
HC status
usbcmd = 0000 Maxp32
usbstat = 0020 HCHalted
usbint = 0000
usbfrnum = (0)000
flbaseadd = 7ffd5000
sof = 40
stat1 = 0080
stat2 = 0080
Most recent frame: 0 (0) Last ISO frame: 0 (0)
Periodic load table
0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0
Total: 0, #INT: 0, #ISO: 0
Frame List
Skeleton QHs
- skel_unlink_qh
[ffff88002e5f4000] Skel QH link (00000001) element (00000001)
queue is empty
- skel_iso_qh
[ffff88002e5f4080] Skel QH link (00000001) element (00000001)
queue is empty
- skel_int128_qh
[ffff88002e5f4100] Skel QH link (7e212482) element (00000001)
queue is empty
- skel_int64_qh
[ffff88002e5f4180] Skel QH link (7e212482) element (00000001)
queue is empty
- skel_int32_qh
[ffff88002e5f4200] Skel QH link (7e212482) element (00000001)
queue is empty
- skel_int16_qh
[ffff88002e5f4280] Skel QH link (7e212482) element (00000001)
queue is empty
- skel_int8_qh
[ffff88002e5f4300] Skel QH link (7e212482) element (00000001)
queue is empty
- skel_int4_qh
[ffff88002e5f4380] Skel QH link (7e212482) element (00000001)
queue is empty
- skel_int2_qh
[ffff88002e5f4400] Skel QH link (7e212482) element (00000001)
queue is empty
- skel_async_qh
[ffff88002e5f4480] Skel QH link (00000001) element (7e215000)
queue is empty
[ffff88002e5f3000] link (00000001) e0 Length=0 MaxLen=7ff DT0 EndPt=0 Dev=7f, PID=69(IN) (buf=00000000)
- skel_term_qh
[ffff88002e5f4500] Skel QH link (7e212502) element (7e215000)
queue is empty


Thanks,
J


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