lkml.org 
[lkml]   [2008]   [Dec]   [8]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    Date
    From
    SubjectRe: Oops in UHCI when encountering "host controller process error"
    Jeremy Fitzhardinge wrote:
    > Alan Stern wrote:
    >> On Thu, 16 Oct 2008, Jeremy Fitzhardinge wrote:
    >>
    >>
    >>> Looks like this is the relevent detail: "uhci->skelqh[1]->node.next
    >>> is NULL" for all the queues. Haven't looked into it yet.
    >>>
    >>
    >> Any news?
    >
    > The problem went away for a while, but then came back. I still have
    > no idea why, but I'm back to debugging it.
    >
    > The most strange thing I'm seeing is this:
    >
    > uhci_hcd 0000:00:1d.0: irq 29, io base 0x0000bce0
    > uhci_alloc_td uhci ffff88002e1a3d58 td ffff88002e105000 dma_handle
    > 4ce2f000
    > uhci_alloc_qh: uhci=ffff88002e1a3d58 qh=ffff88002e106000 handle=4ce36000
    > uhci_alloc_qh: uhci=ffff88002e1a3d58 qh=ffff88002e106080 handle=4ce36080
    > uhci_alloc_qh: uhci=ffff88002e1a3d58 qh=ffff88002e106000 handle=4ce36000
    > uhci_alloc_qh: uhci=ffff88002e1a3d58 qh=ffff88002e106001
    > handle=4ce36001 <<<
    > uhci_alloc_qh: uhci=ffff88002e1a3d58 qh=ffff88002e107000 handle=7e546000
    > uhci_alloc_qh: uhci=ffff88002e1a3d58 qh=ffff88002e107080 handle=7e546080
    > uhci_alloc_qh: uhci=ffff88002e1a3d58 qh=ffff88002e107000 handle=7e546000
    > uhci_alloc_qh: uhci=ffff88002e1a3d58 qh=ffff88002e107001
    > handle=7e546001 <<<
    > uhci_alloc_qh: uhci=ffff88002e1a3d58 qh=ffff88002e108000 handle=7e22d000
    > uhci_alloc_qh: uhci=ffff88002e1a3d58 qh=ffff88002e108080 handle=7e22d080
    > uhci_alloc_qh: uhci=ffff88002e1a3d58 qh=ffff88002e108000 handle=7e22d000
    > usb usb1: configuration #1 chosen from 1 choice
    > uhci_hcd 0000:00:1d.0: host controller process error, something bad
    > happened!
    > uhci_hcd 0000:00:1d.0: host controller halted, very bad!
    > general protection fault: 0000 [#1] SMP DEBUG_PAGEALLOC
    >
    >
    > For some reason dma_pool_alloc() is returning unaligned, overlapping
    > memory chunks. That that point everything else is no surprise...
    >
    > So I'm trying to figure out how the dma pool stuff is malfunctioning,
    > and whether anything we've done is causing it.

    On other runs the allocations turn out OK:

    uhci_alloc_td: uhci ffff88002e631b08 td ffff88002e621000 dma_handle 4ce2f000
    uhci_alloc_qh: uhci=ffff88002e631b08 qh=ffff88002e622000 handle=4ce36000
    uhci_alloc_qh: uhci=ffff88002e631b08 qh=ffff88002e622080 handle=4ce36080
    uhci_alloc_qh: uhci=ffff88002e631b08 qh=ffff88002e622100 handle=4ce36100
    uhci_alloc_qh: uhci=ffff88002e631b08 qh=ffff88002e622180 handle=4ce36180
    uhci_alloc_qh: uhci=ffff88002e631b08 qh=ffff88002e622200 handle=4ce36200
    uhci_alloc_qh: uhci=ffff88002e631b08 qh=ffff88002e622280 handle=4ce36280
    uhci_alloc_qh: uhci=ffff88002e631b08 qh=ffff88002e622300 handle=4ce36300
    uhci_alloc_qh: uhci=ffff88002e631b08 qh=ffff88002e622380 handle=4ce36380
    uhci_alloc_qh: uhci=ffff88002e631b08 qh=ffff88002e622400 handle=4ce36400
    uhci_alloc_qh: uhci=ffff88002e631b08 qh=ffff88002e622000 handle=4ce36000
    uhci_alloc_qh: uhci=ffff88002e631b08 qh=ffff88002e622000 handle=4ce36000


    but the controller crashes and the structures seem to have been corrupted:

    uhci_hcd 0000:00:1d.0: host controller process error, something bad happened!
    uhci_hcd 0000:00:1d.0: host controller halted, very bad!
    [lots of WARN_ONs I added about NULL qh->queue.nexts omitted ]
    Root-hub state: running FSBR: 0
    HC status
    usbcmd = 00c0 Maxp64 CF
    usbstat = 0020 HCHalted
    usbint = 000f
    usbfrnum = (0)000
    flbaseadd = 7dd2b000
    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
    [ffff88002e622000] Skel QH link (4ce36002) element (00000000)
    Element is NULL (bug?)
    queue is empty
    [ffff88002e621000] link (00000001) e0 Length=0 MaxLen=7ff DT0 EndPt=0 Dev=7f, PI
    last QH not linked to next skeleton!
    - skel_iso_qh
    [ffff88002e622080] CTL QH link (00000000) element (00000000)
    Element is NULL (bug?)
    qh->queue.next == NULL
    last QH not linked to next skeleton!
    - skel_int128_qh
    [ffff88002e622100] CTL QH link (4ce36002) element (00000000)
    Element is NULL (bug?)
    qh->queue.next == NULL
    - skel_int64_qh
    [ffff88002e622180] CTL QH link (4ce36002) element (00000000)
    Element is NULL (bug?)
    qh->queue.next == NULL
    - skel_int32_qh
    [ffff88002e622200] CTL QH link (4ce36002) element (00000000)
    Element is NULL (bug?)
    qh->queue.next == NULL
    - skel_int16_qh
    [ffff88002e622280] CTL QH link (4ce36002) element (00000000)
    Element is NULL (bug?)
    qh->queue.next == NULL
    - skel_int8_qh
    [ffff88002e622300] CTL QH link (4ce36002) element (00000000)
    Element is NULL (bug?)
    qh->queue.next == NULL
    - skel_int4_qh
    [ffff88002e622380] Skel QH link (4ce36002) element (00000001)
    queue is empty
    - skel_int2_qh
    [ffff88002e622400] Skel QH link (4ce36002) element (00000001)
    queue is empty
    - skel_async_qh
    [ffff88002e622000] Skel QH link (4ce36002) element (00000000)
    Element is NULL (bug?)
    queue is empty
    [ffff88002e621000] link (00000001) e0 Length=0 MaxLen=7ff DT0 EndPt=0 Dev=7f, PI
    last QH not linked to next skeleton!
    - skel_term_qh
    [ffff88002e622000] Skel QH link (4ce36002) element (00000000)
    Element is NULL (bug?)
    queue is empty
    [ffff88002e621000] link (00000001) e0 Length=0 MaxLen=7ff DT0 EndPt=0 Dev=7f, PI


    Any clues about what this means? Also, where's the best place to dump
    all the structures before kicking off the hardware to make sure they're
    correct from the outset?

    Thanks,
    J


    \
     
     \ /
      Last update: 2008-12-09 02:07    [W:0.026 / U:29.092 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site