From: Felipe Balbi <felipe.balbi@linux.intel.com>
To: alex zheng <tc0721@gmail.com>,
linux-usb@vger.kernel.org,
Mathias Nyman <mathias.nyman@linux.intel.com>
Subject: Re: BUG report: usb: dwc3: Link TRB triggered an intterupt without IOC being setted
Date: Mon, 23 Sep 2019 08:36:41 +0300 [thread overview]
Message-ID: <87a7avh8uu.fsf@gmail.com> (raw)
In-Reply-To: <CADGPSwj3aTJjjHvPSZVgxNRGikznL5i=-8Q2hOUb1LoLbWcRDA@mail.gmail.com>
Hi,
(it helps when you Cc correct maintainers ;-)
alex zheng <tc0721@gmail.com> writes:
> Hi all,
>
> I am a user of dwc3 USB host controller, I found there are some
> confused behavior of trb event on this controller.
> When I run a raw USB data transfer(run bulk in&out transfer with
> libusb) and iperf3(over rndis) at the same time,
> there are some strange interrupts occurs and make the driver report
> error(ERROR DMA transfer).
> And:
So dwc3 is workingo n host mode. Which platform is this?
> 1. this problem only hapened in USB SS mode
> 2. this problem seems not hapen when I run same test case with other
> xhci controller(such as asmedia/intel pcie xhci controller) on PC.
> 3. the kernel version is 4.9.130
Have you tried a more recent kernel? 4.9 is really ancient. Please try
v5.3.
> I think this may be a hw bug of DWC3 USB controller, could anyone
> please give me some help to debug this problem？
>
> The detail log see as below:
> [ 131.074102] c0 3 (ksoftirqd/0) xhci-hcd xhci-hcd.0.auto: xHCI
> handle event, 8000
> 27630 [ 131.074109] c0 3 (ksoftirqd/0) xhci-hcd xhci-hcd.0.auto:
> process trans event : ep_index = 11, event_dma = 1eb13e90
> 27631 [ 131.074117] c0 3 (ksoftirqd/0) xhci-hcd xhci-hcd.0.auto:
> inc_deq, start trb dma = 1eb13e90, dequeue_p = e482ce90, trb_free num
> = 1871, ring type = 2
> 27632 [ 131.074123] c0 3 (ksoftirqd/0) xhci-hcd xhci-hcd.0.auto:
> inc_deq 111, start trb dma = 1eb13ea0, dequeue_p = e482cea0, trb_free
> num = 1872, ring type = 2
> 27633 [ 131.074130] c0 3 (ksoftirqd/0) xhci-hcd xh[ 133.057617] c0 3
> (ksoftirqd/0) xhci-hcd xhci-hcd.0.auto: ERROR Transfer event TRB DMA
> ptr not part of current TD ep_index 16 comp_code 1
> 27634 [ 133.059312] c0 3 (ksoftirqd/0) xhci-hcd xhci-hcd.0.auto:
> Looking for event-dma 000000001eb0fff0 trb-start 000000001eb10000
> trb-end 000000001eb10000 seg-start 000000001eb10000 seg-end
> 000000001eb10ff0
> 27635 [ 133.066215] c0 3 (ksoftirqd/0) xhci-hcd xhci-hcd.0.auto:
> ERROR Transfer event TRB DMA ptr not part of current TD ep_index 16
> comp_code 1
> 27636 [ 133.067908] c0 3 (ksoftirqd/0) xhci-hcd xhci-hcd.0.auto:
> Looking for event-dma 000000001eb10000 trb-start 000000001eb10230
> trb-end 000000001eb10230 seg-start 000000001eb10000 seg-end
> 000000001eb10ff0
> 27637 [ 133.070572] c0 3 (ksoftirqd/0) xhci-hcd xhci-hcd.0.auto:
> ERROR Transfer event TRB DMA ptr not part of current TD ep_index 16
> comp_code 1
> 27638 [ 133.072260] c0 3 (ksoftirqd/0) xhci-hcd xhci-hcd.0.auto:
> Looking for event-dma 000000001eb10010 trb-start 000000001eb10230
> trb-end 000000001eb10230 seg-start 000000001eb10000 seg-end
> 000000001eb10ff0
> 27639 [ 133.075052] c0 3 (ksoftirqd/0) xhci-hcd xhci-hcd.0.auto:
> ERROR Transfer event TRB DMA ptr not part of current TD ep_index 16
> comp_code 1
> 27640 [ 133.076739] c0 3 (ksoftirqd/0) xhci-hcd xhci-hcd.0.auto:
> Looking for event-dma 000000001eb10020 trb-start 000000001eb10230
> trb-end 000000001eb10230 seg-start 000000001eb10000 seg-end
> 000000001eb10ff0
> 27641 [ 133.079472] c0 3 (ksoftirqd/0) xhci-hcd xhci-hcd.0.auto:
> ERROR Transfer event TRB DMA ptr not part of current TD ep_index 16
> comp_code 1
> 27642 [ 133.081159] c0 3 (ksoftirqd/0) xhci-hcd xhci-hcd.0.auto:
> Looking for event-dma 000000001eb10030 trb-start 000000001eb10230
> trb-end 000000001eb10230 seg-start 000000001eb10000 seg-end
> 000000001eb10ff0
> 27643 [ 133.083896] c0 3 (ksoftirqd/0) xhci-hcd xhci-hcd.0.auto:
> ERROR Transfer event TRB DMA ptr not part of current TD ep_index 16
> comp_code 1
> 27644 [ 133.085584] c0 3 (ksoftirqd/0) xhci-hcd xhci-hcd.0.auto:
> Looking for event-dma 000000001eb10040 trb-start 000000001eb10230
> trb-end 000000001eb10230 seg-start 000000001eb10000 seg-end
> 000000001eb10ff0
> 27645 [ 133.088328] c0 3 (ksoftirqd/0) xhci-hcd xhci-hcd.0.auto:
> ERROR Transfer event TRB DMA ptr not part of current TD ep_index 16
> comp_code 1
>
> 1. According these logs above the link trb whose address is 0x1eb0fff0
> occurs a transfer event, but this DMA address is not in the trb ring,
> then the driver report an error(and followed a few error logs witch
> invalid DMA address).
> 2. I dump the data of the address(0x1eb0fff0) and find the IOC bit is
> not set, see as below:
> # dump_reg.sh 0x1eb0fff0 4
> 0x1eb0fff0:0x1EB10000 0x00000000 0x00000000 0x00001800
--
balbi
next prev parent reply other threads:[~2019-09-23 5:36 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-09-22 8:34 BUG report: usb: dwc3: Link TRB triggered an intterupt without IOC being setted alex zheng
2019-09-23 5:36 ` Felipe Balbi [this message]
2019-09-23 7:08 ` alex zheng
2019-09-23 10:15 ` Mathias Nyman
[not found] ` <CADGPSwi87a5+3mCGAgptHgpBsQk9STQrEKs-kC6Nw55nPdRtOw@mail.gmail.com>
2019-09-25 14:48 ` Mathias Nyman
2019-09-25 16:22 ` David Laight
2019-09-26 5:45 ` Felipe Balbi
2019-09-26 8:21 ` Mathias Nyman
2019-09-26 10:38 ` alex zheng
[not found] ` <CADGPSwhCPvdu=KmQP6RHMJnh292UO0uBAt+KyJqqOWY5DWDc3w@mail.gmail.com>
2019-10-23 9:52 ` alex zheng
2019-10-23 10:01 ` Felipe Balbi
2019-10-25 8:44 ` alex zheng
2019-09-23 10:45 ` Felipe Balbi
2019-09-24 14:19 ` alex zheng
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